Amplificador Classe D 25 - 500W Muito Bom

March 29, 2018 | Author: Pablo Igor | Category: Power Supply, Field Effect Transistor, Amplifier, Telecommunications Engineering, Electronic Engineering
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IRAUDAMP7S25W-500W Scalable Output Power Class D Audio Power Amplifier Reference Design Using the IRS2092S Protected Digital Audio Driver By Jun Honda, Manuel Rodríguez, Liwei Zheng CAUTION: International Rectifier suggests the following guidelines for safe operation and handling of IRAUDAMP7S Demo Board: • Always wear safety glasses whenever operating Demo Board • Avoid personal contact with exposed metal surfaces when operating Demo Board • Turn off Demo Board when placing or removing measurement probes www.irf.com IRAUDAMP7S REV 1.3 Page 1 of 42 Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Table of Contents Introduction of scalable design ………………………………………………….. Power table values for each power model……………………………………… Specifications……………………………………………………………………… Connection setup…………………………………………………………………. Test procedure…………………………………………………………………..… Performance and test graphs………………………………………………….… Clipping characteristics…………………………………………………………… Efficiency…………………………………………………………………………… Thermal considerations……………………………………………...…………… PSRR, half bridge, full bridge……………………………………………………. Short circuit response…………………………………………………………….. IRAUDAMP7S Overview……………………………………………………….… Functions Descriptions…………………………………………………………… Selectable dead Time…………………………………..………………………… Protection Features……………………………………………..………………… Click and pop noise control………………………………………….…………… Bus pumping…………………………………………………….………………… Bridged configuration……………………………………….……..……………… Input signal and Gain……………………………………….……………………. Gain settings………………………………………………………………………. Schematics………………………………………………………………………… Bill of Materials………………………………………………………………..…… IRAUDAMP7S models differential table………………………………………... Hardware…………………………………………………………………………… PCB specifications………………………………………………………………… Assembly Drawings………………………………………………………….…… Revision changes descriptions………………………………………………….. Page 3 4 4-5 6 7 8-13 14 14-16 16 16-17 17-18 18-19 20-22 22 23-25 25 26-27 27 29 29 30-32 33-36 37 38-39 40 41 42 www.irf.com IRAUDAMP7S REV 1.3 Page 2 of 42 Introduction The IRAUDAMP7S reference design is a two-channel Class D audio power amplifier that features output power scalability. The IRAUDAMP7S offers selectable half-bridge (stereo) and full-bridge (bridged) modes. This reference design demonstrates how to use the IRS2092 Class D audio driver IC, along with IR’s digital audio dual MOSFETs, such as IRFI4024H-117P, IRFI4019H-117P, IRFI4212H-117P and IRFI4020H-117P, on a single layer PCB. The design shows how to implement peripheral circuits on an optimum PCB layout using a single sided board. The resulting design requires a small heatsink for normal operation (one-eighth of continuous rated power). The reference design provides all the required housekeeping power supplies and protections. Unless otherwise noted, this user’s manual is based on 150V model, IRAUDAMP7S-150. Other output power versions can be configured by replacing components given in the component selection of Table 5 on page 36 Applications • • • • • • • AV receivers Home theater systems Mini component stereos Powered speakers Sub-woofers Musical Instrument amplifiers Automotive after market amplifiers Features Output Power: Residual Noise: Distortion: Efficiency: Multiple Protection Features: Scalable output power from 25W- 500W (see Table 1) 200 μV, IHF-A weighted, AES-17 filter 0.007 % THD+N @ 60W, 4 Ω 90 % @ 500W, 8 Ω, Class D stage Over-current protection (OCP), high side and low side MOSFET Over-voltage protection (OVP), Under-voltage protection (UVP), high side and low side MOSFET DC-protection (DCP), Over-temperature protection (OTP) Self-oscillating PWM, half-bridge or full-bridge topologies selectable PWM topology: www.irf.com IRAUDAMP7S REV 1.3 Page 3 of 42 Table 1 IRAUDAMP7S Specification Table Series Item IR Power FET1A, MOSFET FET1B 8Ω Half Bridge 4Ω Full Bridge 8Ω Nominal +B, -B Supply Voltage Min/Max +B, -B Supply Voltage Voltage Gv Gain Notes: • • All the power ratings are at clipping power (THD+N = 1 %). To estimate power ratings at THD+N=10%, multiply them by 1.33 See Table 5 on page 36 for the complete listing of components table. AMP7S-55 IRFI4024H-117P 25W x 2 50W x 2 100W x 1 ±25V ±20V ~ ±28V 20 Model Name AMP7S-100 AMP7S-150 IRFI4212H-117P 60W x 2 120W x 2 240W x 1 ±35V ±28V ~ ±45V 30 IRFI4019H-117P 125W x 2 250W x 2 500W x 1 ±50V ±45V ~ ±60V 36 AMP7S-200 IRFI4020H-117P 250W x 2 Not Supported Not Supported ±70V ±60V ~ ±80V 40 Specifications General Test Conditions for IRAUDAMP7S-150 (unless otherwise noted) Power Supply Voltages ± 50V Load Impedance 4Ω Self-Oscillating Frequency 400kHz Voltage Gain 36 Notes / Conditions Typical Notes / Conditions IRS2092, Protected digital audio driver IRFI4024H-117P, IRFI4019H-117P, IRFI4212H-117P, IRFI4020H117P Digital audio MOSFETs PWM Modulator Self-oscillating, second order sigma-delta modulation, analog input Power Supply Range ± 45V to ± 60V Or see table 1 above Output Power CH1-2: (1 % THD+N) 300W 1kHz Output Power CH1-2: (10 % THD+N) 400W 1kHz Rated Load Impedance 8-4Ω Resistive load Standby Supply Current +50 mA/-80 mA No input signal Total Idle Power Consumption 7W No input signal Channel Efficiency 90 % Single-channel driven, 250W IR Devices Used . Electrical Data www.irf.com IRAUDAMP7S REV 1.3 Page 4 of 42 007 % 0. 4 Ω – 8 Ω Load Thermal Performance (TA=25 °C) Condition Idling 2 ch x 31W (1/8 rated power) 2 ch x 250W (Rated power) Typical TC =30 °C TPCB=37 °C TC =54 °C TPCB=67 °C TC =80 °C TPCB=106 °C Notes / Conditions No signal input OTP shutdown after 150 s Physical Specifications Dimensions Weight 5. Single-channel driven A-weighted.02 % 0.007 % 101 dB 200 μV 2000 95 dB 85 dB 75 dB 20 Hz-35kHz Class D Output 0. 60W THD+N. relative to 4 Ω load 100Hz 1kHz 10kHz 1W. 100W Dynamic Range Residual Noise Damping Factor Channel Separation Frequency Response : 20 Hz20kHz Before Demodulator 0.Audio Performance THD+N. 10W THD+N.3 Page 5 of 42 . AES17 filter Self-oscillating frequency 400kHz 1kHz. 1W THD+N.7”(L) x 4”(W) x 1.com IRAUDAMP7S REV 1.008 % 101 dB 200 μV 120 90 dB 80 dB 65 dB ±3 dB Notes / Conditions 1kHz.330kgm www.25”(H) 145 mm (L) x 100 mm (W) x 35 mm(H) 0.005 % 0. AES-17 filter.005 % 0.007 % 0. Single-channel operation 22 Hz – 20kHz.01 % 0.irf. com IRAUDAMP7S REV 1. 5A DC supply -B. 5A DC supply 4 Ohm G SPK1A CNN1 4 Ohm SPK1B LED1 A LED2 A RCA1A LED1 B S1 LED2 S300 B RCA1B Audio Signal Fig 1 Typical Test Setup Connector Description CH1 IN CH2 IN SUPPLY CH1 OUT CH2 OUT RCA1A RCA1B CNN1 SPK1A SPK1B Analog input for CH1 Analog input for CH2 Positive and negative supply (+B / -B) Output for CH1 Output for CH2 Switches Descriptions S1 S300 Shutdown PWM Half bridge / Full bridge select Indicator Description LED1A.irf.B PWM (presence of low side gate signal) Protection www.3 Page 6 of 42 .Test Setup +B. B LED2A. 7. 13.irf. Turn ON the dual power supply. www. Turn OFF the dual power supply before connecting to UUT. the negative supply current must be less than 100 mA. 15. Slide S1 to ON position. The red LEDs (Protections) turn ON immediately and stay on as long as S1 is in OFF position. 14. set switch S1 to OFF and S300 to Stereo positions. Connect 4 Ω-200 W dummy loads to output connectors. Waveform must be a non distorted sinusoidal signal. quiescent current for the positive supply must be less than 50 mA. On the unit under test (UUT). Sweep the audio signal voltage from 15 mVRMS to 1 VRMS. 18. Set up a dual power supply ±50V with 5A current limit 4. 17. Blue LEDs stay OFF. Switching Frequency Test: 11. 20 mVRMS output. 16. Adjust the potentiometer resistances of P11A and P11B for CH1 and CH2 respectively. Observe that voltage gain doubles. while S1 is in OFF position. capacitor CP3 10. SPKR1A and SPKR1B. Connect the dual power supply to CNN1. 2. Under the normal operating condition with no input signal applied. Set the signal generator to 1kHz. 8. Observe 1 VRMS input generates output voltage of 36 VRMS. R8/(R7+R2).Test Procedures Test Setup: 1. Connect audio signal generators to RCA1A and RCA1B.3 Page 7 of 42 . This transition delay time is controlled by CSD pin of IRS2092. The ±B supplies must be applied and removed at the same time.com IRAUDAMP7S REV 1. Audio Functionality Tests: 12. the two blue LEDs turn ON and the red LEDs turns off. as shown on Fig 1. Note: To change self-oscillating switching frequency. Under this condition. With an oscilloscope. 9. 3. The ratio. Power up: 6. determines the voltage gain of IRAUDAMP7S. monitor switching waveform at test points VS1 & VS2 Adjust P1A & P1B to change self oscillating frequency to 400kHz ± 25kHz. Set switch S300 to Bridged position. 5. The two blue LEDs indicate that PWM oscillation is present. Quiescent current for the positive and negative supplies must be less than 50mA. Monitor the output signals at SPK1A/B with an oscilloscope. after one second delay. as shown in Fig 1. IRS2092 is in shutdown mode. Connect Ap frame ground to GND in terminal CNN1. SPKR1A and SPKR1B. Use unbalance-floating signal generator outputs. Test Results 10 5 2 1 0.5 0.002 0.3 Page 8 of 42 . Stereo. 4 Ω .02 0.001 100m 200m 500m 1 2 W 5 10 20 50 100 Red = CH1.005 0. 20. Use balanced inputs taken across output terminals.01 0.Test Setup using Audio Precision (Ap): 19.Fig 13 below.irf.com IRAUDAMP7S REV 1.05 0. Run Ap test programs for all subsequent tests as shown in Fig 2. 21. THD+N versus Power. Blue = CH2 ±B Supply = ±25V. 22. 24. 4 Ω Resistive Load Fig 2 IRAUDAMP7S-55.2 % 0. Use signal voltage sweep range from 15 mVRMS to 1 VRMS. Place AES-17 filter for all the testing except frequency response. www.1 0. 23. 02 0.1 0. 8 Ω Resistive Load. 10 5 2 1 0. Stereo. Bridged Fig 4 IRAUDAMP7S-100.02 0.1 0. THD+N versus Power.5 0.005 0.001 100m 200m 500m 1 2 5 W 10 20 50 100 200 Red = CH1.irf. 4 Ω . Bridged.05 0. 8 Ω www.005 0.01 0.002 0. 4 Ω Resistive Load Fig 3 IRAUDAMP7S-100. THD+N versus Power.2 % 0.3 Page 9 of 42 .5 0.001 100m 200m 500m 1 2 5 W 10 20 50 100 200 500 ±B Supply = ±35V.01 0. Blue = CH2 ±B Supply = ±35V.com IRAUDAMP7S REV 1.10 5 2 1 0.05 0.2 % 0.002 0. 005 0.01 0.001 100m 200m 500m 1 2 5 10 W 20 50 100 200 700 ±B Supply = ±50V. 4 Ω Resistive Load Fig 5 IRAUDAMP7S-150. Stereo. 10 5 2 1 0.02 0. 4 Ω .2 % 0. THD+N versus Power. THD+N versus Power. 8 Ω Resistive Load Fig 6 IRAUDAMP7S-150.01 0.3 Page 10 of 42 .2 % 0.5 0. www.com IRAUDAMP7S REV 1.002 0.1 0.001 100m 200m 500m 1 2 5 W 10 20 50 100 200 500 Red = CH1. Blue = CH2 ±B Supply = ±50V. 10 5 2 1 0..5 0.05 0.02 0. Bridged 8 Ω .005 0.irf.002 0.1 0.05 0. 8 Ω. www.irf. +4 +2 +0 d B r A -2 -4 -6 -8 -10 20 50 100 200 500 1k 2k Hz 5k 10k 20k 50k 100k 200k Red Blue CH1 .com IRAUDAMP7S REV 1.4 Ω. 2 V Output referenced CH1 .3 Page 11 of 42 . 2 V Output referenced Fig 8 Frequency Response (All Models) .. Stereo . www. 50W Output Fig 9 IRAUDAMP7S-150.com IRAUDAMP7S REV 1.3 Page 12 of 42 .002 0. Blue = CH2 1V Output Fig 10 IRAUDAMP7S-150.2 % 0.001 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Red Blue CH1.005 0. 10W Output CH1.01 0.irf.1 0. +0 -10 -20 -30 -40 d B V -50 -60 -70 -80 -90 -100 -110 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Red = CH1.5 0.02 0.05 0.10 T 5 2 1 0. 1 kHz – 1 V Output Spectrum. THD+N versus Frequency. 4Ω . No signal.ACD.1V Output Spectrum. No signal.ACD. 1 kHz . Self Oscillator @ 400kHz Fig 12 IRAUDAMP7S-150 Noise Floor .3 Page 13 of 42 . Self Oscillator @ 400kHz CH2 .+0 -10 -20 -30 -40 d B V -50 -60 -70 -80 -90 -100 -110 20 50 100 200 500 Hz 1k 2k 5k 10k 20k 1V Output Fig 11 IRAUDAMP7S-150. www.irf. Bridged .com IRAUDAMP7S REV 1. +20 +0 -20 -40 d B V -60 -80 -100 -120 -140 10 20 50 100 200 500 Hz 1k 2k 5k 10k 20k Red Blue CH1 . THD+N = 10 % Measured Output and Distortion Waveforms Fig 13 Clipping Characteristics .irf. THD+N = 0. 1 kHz. www.Clipping characteristics Red Trace: Total Distortion + Noise Voltage Gold Trace: Output Voltage 210 W / 4 Ω. Stereo . 4 Ω.3 Page 14 of 42 . Efficiency Figs 14-19 show efficiency characteristics of the IRAUDAMP7S.02 % 310 W / 4 Ω. avoiding cross-conduction 100% 90% 80% Efficiency (%) 70% 60% 50% 40% 30% 20% 10% 0% 0 10 20 30 40 50 60 25V-4ohms Output power (W) ±B Supply = ±25 V Fig 14 Efficiency versus Output Power. The high efficiency is achieved by following major factors: 1) Low conduction loss due to the dual FETs offering low RDS(ON) 2) Low switching loss due to the dual FETs offering low input capacitance for fast rise and fall times 3) Secure dead-time provided by the IRS2092. IRAUDAMP7S-55. 1 kHz.com IRAUDAMP7S REV 1. irf. 4 Ω. Bridged . 8 Ω. Stereo . Stereo www. IRAUDAMP7S-100. IRAUDAMP7S-100.com IRAUDAMP7S REV 1. 90% 80% Efficiency (%) 70% 60% 50% 40% 30% 20% 10% 0% 0 50 100 150 200 250 300 50V-4ohms Output power (W) ±B Supply = ±50V Fig 17 Efficiency versus Output Power.100% 90% 80% Efficiency (%) 70% 60% 50% 40% 30% 20% 10% 0% 0 20 40 60 80 100 120 140 160 35V-4ohms Output power (W) ±B Supply = ±35 V Fig 15 Efficiency versus Output Power. IRAUDAMP7S-150. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0 50 100 150 200 250 300 Efficiency (%) 35V-8ohms-Full bridge Output power (W) ±B Supply = ±35V Fig 16 Efficiency versus Output Power.3 Page 15 of 42 . 4 Ω. 8 Ω. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0 50 100 150 200 250 300 Efficiency (%) 70V-8ohms Output power (W) ±B supply = ±70V Fig 19 Efficiency versus Output Power. without additional heatsink or forced air-cooling. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0 50 100 150 200 250 300 350 400 450 500 550 Efficiency (%) 50V-8ohms-Full bridge Output power (W) ±B Supply = ±50V Fig 18 Efficiency versus Output Power. Bridged .3 Page 16 of 42 . IRAUDAMP7S-200. With this high PSRR.. www.irf. which is generally considered to be a normal operating condition for safety standards. IRAUDAMP7S-150. the IRAUDAMP7S design can handle one-eighth of the continuous rated power. Stereo Thermal Considerations With this high efficiency. IRAUDAMP7S accepts any power supply topology as far as the supply voltages fit in the min and max range. 8 Ω.com IRAUDAMP7S REV 1. Power Supply Rejection Ratio (PSRR) The IRAUDAMP7S obtains good power supply rejection ratio of -65 dB at 1kHz shown in Fig 20. 3 Page 17 of 42 .com IRAUDAMP7S REV 1.Red: VAA & VSS are fed by +/-B bus Green: VAA & VSS are fed by external +/-5 V regulated power supplies.irf. If the short circuit persists. www. After one second. the IRS2092 tries to resume the PWM. As soon as the IRS2092 detects over current condition. it shuts down PWM. Short Circuit in Positive and Negative Load Current CSD pin CSD pin VS pin Positive OCP VS pin Load current Load current Negative OCP Fig 21 Positive and Negative OCP Waveforms . Fig 20 IRAUDAMP7S Power Supply Rejection Ratio Short Circuit Protection Response Figs 21-23 show over current protection reaction time of the IRAUDAMP7S in a short circuit event. the IRS2092 repeats try and fail sequences until the short circuit is removed. com IRAUDAMP7S REV 1. The www. Fig. Fig 22 OCP Response with Continuous Short Circuit .irf. 23 High and Low Side OCP current waveform reaction time IRAUDAMP7S Overview The IRAUDAMP7S features a self-oscillating type PWM modulator for the lowest component count.3 Page 18 of 42 .OCP Waveforms Showing CSD Trip and Hiccup CSD pin VS pin Load current Load current VS pin CSD pin . This topology represents an analog version of a second-order sigma-delta modulation having a Class D switching stage inside the loop. highest performance and robust design. Actual Reaction Time OCP Waveforms Showing actual reaction time . The IRAUDAMP7S self-oscillating topology consists of following essential functional blocks. The IRS2092 drives two MOSFETs. is that all the error in the audible frequency range is shifted to the inaudible upper-frequency range by nature of its operation. in the power stage providing the amplified PWM waveform.and low-sides. high. P1. C4. C6.com IRAUDAMP7S REV 1.benefit of the sigma-delta modulation.3 Page 19 of 42 . in comparison to the carrier-signal based modulation. PWM Comparator The carrier signal in COMP pin is converted to PWM signal by an internal comparator that has threshold at middle point between VAA and VSS. The high-side levelshifter shifts up the high-side gate drive signal out of the dead-time block. • Front-end integrator • PWM comparator • Level shifters • Gate drivers and MOSFETs • Output LPF Integrator Referring to Fig 24 below. and R11. the input operational amplifier of the IRS2092 forms a front-end secondorder integrator with R7. Level Shifters The internal input level-shifter transfers the PWM signal down to the low-side gate driver section. Also. The comparator has no hysteresis in its input threshold. www. The analog input signal shifts the average value of the quadratic waveform such that the duty cycle varies according to the instantaneous voltage of the analog input signal.irf. The integrator that receives a rectangular feedback signal from the PWM output via R8 and audio input signal via R7 generates quadratic carrier signal in COMP pin. sigma-delta modulation allows a designer to apply a sufficient amount of error correction. The gate driver section has another level-shifter that level shifts up the high-side gate signal to the high-side gate driver section. Gate Drivers and MOSFETs The received PWM signal is sent to the dead-time generation block where a programmable amount of dead time is added into the PWM signal between the two gate output signals of LO and HO to prevent potential cross conduction across the output power MOSFETs. These functions include OCP and UVP. filters out the Class D switching carrier signal leaving the audio output at the speaker load. The IRS2092 integrates bidirectional over current protection for both high-side and low-side MOSFETs. a high-voltage (up to 200 V). . minimizing deadtime while preventing shoot-through.Output LPF The amplified PWM output is reconstructed back to analog signal by the output LC LPF. The dead-time can be selected for optimized performance according to the size of the MOSFET. there is no gate-timing adjustment required externally. www.irf.com IRAUDAMP7S REV 1. R26 and R27 as shown on Fig 25 below. R25 CP2 CP5 -VSS COM +VCC -B R118 . R8 R117 +B CP4 0V C4 R11 C6 +VAA VB IRS2092 HO CP6 R24 +B 0V -B LP Filter FET1 IRFI4024H-117P IRFI4212H-117P IRFI4019H-117P IRFI4020H-117P D3 L1 C12 COMP C7 0V R7 INPUT INGND 0V + . As a result. Selectable dead-time through the DT pin voltage is an easy and reliable function which requires only two external resistors. Modulator and Shift level Integrator VS VCC LO . a design with a lower switching frequency may require an additional stage of LPF. A single stage output filter can be used with switching frequencies of 400 kHz and greater. Fig 24 Simplified Block Diagram of IRAUDAMP7S Class D Amplifier Functional Descriptions IRS2092 Gate Driver IC The IRAUDAMP7S uses IRS2092. high-speed power MOSFET driver with internal dead-time and protection functions specifically designed for Class D audio amplifier applications. Demodulation LC low-pass filter (LPF) formed by L1 and C12.3 Page 20 of 42 . 400V R21 10R VCC 3 TIP31C Q105 Z102 R23 10k -B CP101 15V 22uF Fig 25 System-level View of IRAUDAMP7S Self-Oscillating Frequency Self-oscillating frequency is determined by the total delay time along the control loop of the system. The frequency is highest at idling. R11 R8.6V R14 4.2k 4 3 R28 10R CH1 OUT SPKR1 1 2 R20 4. 400V *470uF.com C14 -B C8 IRAUDAMP7S REV 1. VS1 Feedback R8 *120k 1% RCA1 RCA1 CP1 22uF R2 330 C2 1nF CP4 Z103 5. The self-oscillating frequency changes with the duty ratio. Variations in +B and –B supply voltages also affect the self-oscillating frequency.250V -B *MUR120RLG C13 0.1k R19 10k CP6 22uF D4 C9 FET1 *IRFI4019H-117P 5 HS1 R29 150pF.100V 0.irf. R7.5k OCSET IRS2092S DT 9 R26 10k R27 10k CP5 22uF 7 VSS VREF LO COM 11 10 2 C4 C6 1 1nF 1nF 22uF 2K POT P1 +VAA 1 R11 100R 3 C7 1nF 4 5 INCOMP CSD HO VS VCC 14 13 12 D3 2 VAA GND CSH VB 16 15 R7 *3.100V C10 CP8 *470uF. www.1uF. the time-constant of front-end integrator (P1. C7).100V R1 100k 0.7k RED PROT CSD1 3 FET2 BS250F R3 SD D1 100R CP3 Z104 5. the propagation delay of the IRS2092.3 Page 21 of 42 .3k 1w R17 +B *47k R18 *9. C6. It drops as duty cycle varies away from 50%.01K 1% U1 R22 10k R117 *3. 1W D6 R31 2. • PWM modulator • Dead-time insertion • Over current protection • Under voltage protection • Level shifters Refer to IRS2092 datasheet and AN-1138 for more details.1uF.1uF.250V +B C11 0.The IRS2092 offers the following functions.400V R24 20R +B L1 22uH CH_OUT *MUR120RLG D5 C12 0.1uF.100V CP7 R30 10. the MOSFETs switching speed.3k 1W 10uF 6 CP2 22uF R13 10k 8 R12 *7.7R R25 20R LED1 Blue 2 R114 *1k 1W R115 1 *15k 1 2 10R + CH1 - 150pF.6V R118 *3. C4.47uF. 36xVcc 0.3kΩ <10k DT/SD Voltage Vcc 0.46 x Vcc 0. Dead-time Mode DT1 DT2 DT3 DT4 R1 <10k 5. while at lower frequencies. Fig 26 lists the suggested component value for each programmable dead-time between 25 and 105 ns. Normally.Adjustments of Self-Oscillating Frequency Use P1 & R11 to set different self-oscillating frequencies.7kΩ 3. In the absolute terms. Selectable Dead-time The dead-time of the IRS2092 is set based on the voltage applied to the DT pin. Under the normal operating condition with no audio input signal. when adjusting the self-oscillating frequency of the different channels. VDT Voltage Protection System Overview www.3 Page 22 of 42 .23xVcc 0.6kΩ 8. it is suggested to either match the frequencies accurately. the bandwidth of the amplifier suffers. interference between channels is most significant if the relative frequency difference is within the audible range. both in absolute frequency and frequency relative to the other channels. or have them separated by at least 25kHz.57xVcc Vcc COM Fig 26 Dead-time Settings vs. The PWM switching frequency in this type of self-oscillating switching scheme greatly impacts the audio performance. All the IRAUDAMP7S models use DT2 (45ns) dead-time.irf. In relative terms. at higher frequencies distortion due to switching-time becomes significant.5mA Vcc R1 75nS 105nS VDT DT R2 0. the switching-frequency is set around 400kHz in the IRAUDAMP7S.time IRS2092(S) 25nS 45nS >0.com IRAUDAMP7S REV 1.29 x Vcc COM Recommended Resistor Values for Dead Time Selection Dead.2kΩ Open R2 Open 4. The rest of the protections.2V +VAA FET2 PROT VB HO FET1 LP Filter CSD VS CSD VCC OCSET LO BLUE .2k 2N3906 R101 4. under-voltage protection (UVP).com IRAUDAMP7S REV 1. Once the fault is cleared. the external shutdown circuit will disable the output by pulling down CSD pins. R17 CSH R18 R19 D4 BAV19 + 1. TH100 is thermally connected with Heat sink DCP Q102 2N3906 R108 CH1_OUT 100k R109 CH2_OUT 100k R110 100k CP100 OTP R103 715R TH100 2. RED UVP +B . turning on red LEDs. the blue LEDs turn on and red LEDs turn off. .irf.The IRS2092 integrates over current protection (OCP) inside the IC. and turning off blue LEDs (Fig 28). are realized externally to the IRS2092 (Fig 27).7k Q101 330uF.7k Q103 2N3906 R104 4. OTP. the protection circuit stays in shutdown until the fault is removed.1V OCREF R13 R12 LED1 -B OCSET COM Fig 28 Simplified Functional Diagram of OCP and Associated LED Indicators www.3 Page 23 of 42 . In the event that any of these external fault conditions are detected. speaker DC offset protection (DCP) and over temperature protection (OTP). UVP and OVP Protection Circuits . If the fault condition persists. -VSS CP3 OCREF 5. 10V -VSS1 1 S1 2 3 4 5 +B +B Z100 *68V R111 10k Z101 *39V OVP -VSS1 SD R102 10k Q100 2N3904 6 SW DPDT R105 10k R106 10k R107 10k JW3 R112 47K C100 0. such as over-voltage protection (OVP).1uF Q104 2N3904 R113 10k -VSS1 -VSS1 Fig 27 DCP. com IRAUDAMP7S REV 1. An external resistive divider R19.6V across the drain-to-source.3K Amp7-100 3.2K 23A 8. High-Side Current Sensing The high-side current sensing protects the high side MOSFET from an overload condition in positive load current by measuring drain-to-source voltage across RDS(ON) during its on state.Over-Current Protection (OCP) Low-Side Current Sensing The low-side current sensing feature protects the low side MOSFET from an overload condition in negative load current by measuring drain-to-source voltage across RDS(ON) during its on state. High-side over-current sensing monitors drain-to-source voltage of the high-side MOSFET while it is in the on state through the CSH and VS pins. R18 and R17 are used to program a threshold as shown in Fig 26.5K 30A 9.7K 23A 6.1K 29A 12.9A Over-Voltage Protection (OVP) OVP is provided externally to the IRS2092. the IRS2092 turns off outputs and pulls CSD down to -VSS.irf. The CSH pin detects the drain voltage with reference to the VS pin. When the VS voltage during low-side conduction gets higher than the OCSET voltage. OCP shuts down the switching operation if the drain-to-source voltage exceeds a preset trip level.2V.7A Amp7-150 7. OCP shuts down the switching operation if the drain-to-source voltage exceeds a preset trip level. An external reverse blocking diode D4 is required to block high voltage feeding into the CSH pin during low-side conduction. In contrast to the low-side current sensing.1K 23A 8. By subtracting a forward voltage drop of 0. The voltage setting on the OCSET pin programs the threshold for low-side over-current sensing. which is the source of the high-side MOSFET.3 Page 24 of 42 . the threshold of CSH pin to trigger OC protection is internally fixed at 1.0 4. Table 2 Actual OCP table setting thresholds Device R12A R12B Tested OCP current 25oC CSH R18A R18B Tested OCP current 25oC Peak load current at rated power Function OCSET Amp7-55 1. the minimum threshold which can be set for the high-side is 0.2A Amp7-200 5.9K 23A 0.0A 8.6V at D4. OVP www. The threshold is determined by a Zener diode Z100. OVP shuts down the amplifier if the bus voltage between GND and +B exceeds 75V. TH100 in Fig 25. If the heatsink temperature rises above 100 °C. If this abnormal condition is caused by a MOSFET failure because one of the high-side or low-side MOSFETs short circuited and remained in the on state. UVP prevents unwanted audible noise output from unstable PWM operation during power up and down. is placed in close proximity to two dual MOSFETs on a heatsink to monitor heatsink temperature. www. During the shutdown mode the output MOSFETs are kept off.3 Page 25 of 42 . the OTP shuts down both channels by pulling down CSD pins of the IRS2092. IRAUDAMP7S does not use any additional components for this function. DC offsets are tested to be less than ±20 mV. Click and POP Noise Reduction Thanks to the click and pop elimination function built into the IRS2092. Offset Null (DC Offset) Adjustment The IRAUDAMP7S requires no output-offset adjustment. ON-OFF Switch OFF position of S1 forces the IRAUDAMP7S to stay in shutdown mode by pulling down the CSD pin. Over-Temperature Protection (OTP) A NTC resistor. Output DC offset greater than ±4V triggers DCP. Under-Voltage Protection (UVP) UVP is provided externally to the IRS2092. such as due to bus pumping at very low frequency continuous output in stereo mode. Speaker DC-Voltage Protection (DCP) DCP protects speakers against DC output current feeding to its voice coil. the power supply needs to be cut off in order to protect the speakers.protects the board from harmful excessive supply voltages.com IRAUDAMP7S REV 1. UVP shuts down the amplifier if the bus voltage between GND and +B falls below a voltage set by Zener diode Z101. OTP recovers once the temperature has cooled down.irf. DC offset detection detects abnormal DC offset and shuts down PWM. Power Supply Requirements For convenience. Since the energy flowing in the Class D switching stage is bi-directional. respectively. D3 and CP6 form a bootstrap floating supply for the HO gate driver. Lower output frequencies (bus-pumping duration is longer per half cycle) 2.3 Page 26 of 42 . Gate driver section of IRS2092 uses VCC to drive gates of MOSFETs. One of the easiest counter measures of bus pumping is to drive both of the channels in a stereo configuration out-of-phase so that one channel consumes the energy flow from the other and does not return it to the power supply. Following conditions make bus pumping worse: 1.6V for analog signal processing. The VCC is referenced to –B (negative power supply). The majority of the energy flowing back to the supply is from the energy stored in the inductor in the output LPF. House Keeping Power Supply The internally-generated housekeeping power supplies include ±5. creating bus voltage fluctuations. and +12V supply (VCC) referred to negative supply rail -B for MOSFET gate drive. The VAA and VSS supplying floating input section are fed from +B and -B power stage bus supplies via R117 and R118. Usually.com IRAUDAMP7S REV 1. the IRAUDAMP7S has all the necessary housekeeping power supplies onboard and only requires a pair of symmetric power supplies. Bus Pumping When the IRAUDAMP7S is running in the stereo mode.irf. Consequently the bus voltage is pumped up. www. bus pumping effect takes place with low frequency high output. There is no bus pumping effect in full bridge mode. Smaller bus capacitance (the same energy will cause a larger voltage increase) The OVP protects IRAUDAMP7S from failure in case of excessive bus pumping. Bus voltage detection monitors only +B supply. the power supply has no way to absorb the energy coming back from the load. Higher power output voltage and/or lower load impedance (more energy transfers between supplies) 3. assuming the bus pumping on the supplies is symmetric in +B and -B supplies. Power supply voltage depends on the model and is shown in the power selection in Table 1. there is a period where the Class D amplifier feeds energy back to the power supply. 1uF Fig 30 Bridged Configuration (BTL) www.irf. also known as bridge-tied-load. C300 R301 22k R302 +VAA 7 0. Full bridge operation is achieved by feeding out-of-phase audio input signals to the two input channels as shown in the Fig 30 below. The speaker output must be connected between (+) of Channel A and (+) of Channel B in bridged mode. nominal load impedance is 8 Ω. In bridged mode. Pink: Negative Rail voltage (-B) Fig 29 Bus Pumping in Half Bridge Mode Bridged Configuration By selecting S300 to Bridged position. The on-board inverter feed out-of-phase signal to Channel B. (See power table in Table 1) . Green: Speaker Output.com IRAUDAMP7S REV 1. IRAUDAMP7S receives audio input signal from channel A only.Cyan: Positive Rail voltage (+B). In bridged mode. or BTL configuration.1uF 1 2 6 3 5 4 C301 5 6 SW DPDT 100 8 U300 TL072CP Bridged CP1B+ S300 1 2 3 4 From Ch B RCA2 From Ch A RCA1 JW8 R300 22k Steereo R303 -VSS 100 0.3 Page 27 of 42 . the IRAUDAMP7S realizes full bridge mode. T 100 T 10 1 % 0.Load Impedance Each channel is optimized for a 4 Ω speaker load in half bridge and 8 Ω load in full bridge. 1) The DC resistance of the inductor should be minimized to 20 mΩ or less.0001 100m 200m 500m 1 2 5 W 10 20 50 100 200 Fig 31 THD+N vs. Output Filter Selection Since the output filter is not included in the control loop of the IRAUDAMP7S. Output Power with Different kind of Output Inductors www. Fig 31 demonstrates THD performance difference with various inductors. the control loop has no ability to compensate performance deterioration caused by the output filter. it is necessary to understand what characteristics are preferable when designing the output filter.3 Page 28 of 42 . 2) The linearity of the output inductor and capacitor should be high with output current and voltage. Therefore.irf.001 0.1 0.com IRAUDAMP7S REV 1.01 0. 0V L1 C12 0V . This RC filter works also as an input RF filter to prevent potential radio frequency interferences.irf. and the LC resonance can activate OCP. Changing R8 affects PWM control loop design and may result poor audio performance. . To change the voltage gain. C13 R30 . (Fig 32) The Zobel network is not thermally rated to handle continuous supersonic frequencies above 20kHz.com IRAUDAMP7S REV 1. change the input resistor term R2. LP Filter . The IRAUDAMP7S has an RC network called Zobel network (R30 and C13) to damp the resonance and prevent peaking frequency response with light loading impedance. www. causing a large reactive current flowing through the switching stage. Input signal with frequencies from 30kHz to 60kHz may cause LC resonance in the output LPF. especially with greater than 8 Ω load impedances.3 Page 29 of 42 .Input Signal and Gain Setting A proper input signal is an analog signal ranging from 20Hz to 20kHz with up to 3 VRMS amplitude with a source impedance of no more than 600 Ω. The IRAUDAMP7S has no on board volume control. These supersonic input frequencies can be filtered out by adding R2 and C2 as shown on main schematic Fig 33 and Fig 34. Fig 32 Output Low Pass Filter and Zobel Network Gain Setting The ratio of resistors R8/R2 in Fig 33 sets voltage gain. 5k OCSET IRS2092S DT 9 R26 10k R27 10k CP5 22uF 7 VSS VREF LO COM 11 10 2 C4 C6 1 1nF 1nF 22uF 2K POT P1 +VAA 1 R11 100R 3 C7 1nF 4 5 INCOMP CSD HO VS VCC 14 13 12 D3 2 VAA GND CSH VB 16 15 R7 *3.100V C10 CP8 *470uF. Channel 1 & Channel 2 .7k RED PROT CSD1 3 FET2 BS250F R3 SD D1 100R -VSS Z104 5. 400V *470uF.1uF.-B are +/-70Vwith FET1 as IRFI4020H-117P -B CP101 15V 22uF IRAUDAMP7S Rev 1.100V 0.irf.3k 1w R17 +B R1 100k C9 *9.250V -B *MUR120RLG C13 0.3k 1W CP2 22uF R13 10k 8 R12 *7. 400V R21 10R VCC 3 TIP31C Q105 Z102 R23 10k Note: Com ponents values m arked on red or * are according to power table IRAUDAMP7-55.1uF. www. +B.6V CP3 10uF 6 R118 *3.250V CH1 10k *47k R18 +B C11 0.1uF.com IRAUDAMP7S REV 1.7R R25 20R LED1 Blue 2 R114 *1k 1W R115 1 *15k 1 2 10R + CH1 - 150pF. 1W D6 R31 2.2k 10R CH1 OUT SPKR1 1 2 R20 4.1uF. +B.-B are +/-50Vwith FET1 as IRFI4019H-117P IRAUDAMP7-200.47uF.-B are +/-25V with FET1 as IRFI4024H-117P IRAUDAMP7-100.0 Fig 33 Amplifier Schematic.400V R24 20R 4 3 R28 R29 +B L1 22uH CH_OUT *MUR120RLG D5 C12 0.100V 0.VS1 Feedback Note: R2 & C2 are RF filters. +B.1k R19 10k CP6 22uF D4 FET1 *IRFI4019H-117P 5 HS1 150pF.6V R14 4. +B.-B are +/-35Vwith FET1 as IRFI4212H-117P IRAUDAMP7-150.01K 1% U1 R22 R8 *120k 1% R117 *3.100V CP7 R30 10.3 Page 30 of 42 C14 -B C8 . optional RCA1 RCA1 CP1 22uF R2 330 C2 1nF CP4 Z103 5. com IRAUDAMP7S REV 1.JW2 SD JW3 JW4 JW5 VCC -B VCC +B -B JW7 JW8 JW9 JW10 JW11 VCC -B VCC +B -B SD TH1 is thermally connected with FET1 DCP Q102 MMBT5401 R108 CH2_OUT 100k R109 100k R110 100k CP100 OTP R103 715R TH100 TH2.7k -VSS 1 Q103 MMBT5401 R104 4.1uF Q104 MMBT5551 UVP R102 10k R105 10k R106 10k R107 10k R112 47k R113 10k -VSS -VSS Note: Com ponents values m arked on red or * are according to power table Fig 34 Protection Schematic .irf.7k Q101 S1 2 3 4 5 6 SW DPDT +B Z100 *68V 330uF.10V +B R111 10k Z101 *39V -VSS OVP SD Q100 MMBT5551 C100 0.3 Page 31 of 42 . www.2k JW12 CH1_OUT MMBT5401 R101 4. irf.1uF Fig 35 Bridge Preamp Schematic www.Bridged S300 CP1B+ 1 3 4 5 C300 R301 22k JW1 R302 100 8 6 3 5 C301 4 U300 TLC081IDR 7 6 SW DPDT JW6 2 FromCh B RCA2 Steereo +VAA FromCh A RCA1 0.3 Page 32 of 42 .com IRAUDAMP7S REV 1.1uF 1 2 R300 22k R303 -VSS 100 0. com IRAUDAMP7S REV 1. LED1B P1A. CP3B CP7A.250V 150pF. C9B C10A. C9A. CP5A. BS250FTC-ND Drawing IRHS_Amp1 Custom Custom Custom Custom Custom Custom Sagami 7G17A-220MR or IN09063 160-1600-ND 3362H-202LF-ND MMBT5551FSCT-ND Panasonic . 13A CAP ELECT 10UF 16V KS RADIAL CAP 470UF 100V ELECT PW RADIAL CAP 330UF 10V ALUM LYTIC RADIAL LED 3MM HI-EFF RED TRANSPARENT DIODE SWITCH 75V 200MW DIODE ULTRA FAST 1A 200V DIODE SWITCH 100V 200MW DIODE ULTRA FAST 1A 200V IRFI4019H-117P. FET1B FET2A. C2B. D6B FET1A. Inc. D3B D4A. C13B C11A. CP6B. CP101B CP3A. C6A.IRAUDAMP7S-150 Fabrication Materials Table 3 IRAUDAMP7S-150 Electrical Bill of Materials Quantity 8 4 4 4 2 3 1 12 Value 1nF. 16V 470uF.1uF. CP101A. C11B. JW4. #20 #20 #20 #20 #20 #20 22UH AWG AWG AWG AWG AWG AWG P966-ND 493-1985-ND P5125-ND 160-1140-ND 1N4148WS-FDICT-ND MURA120T3GOSCTND BAV19WS-FDICT-ND MURA120T3GOSCTND IR's Part No. CP1B. P1B Q100.1uF. C4B. C14B C12A. Fairchild Semiconductor CSD1A.ECG Nichicon Panasonic .3 Page 33 of 42 .10UF 400V METAL POLYPRO CAP .irf.1uF. CSD1B D1A. C12B C13A. LITE-ON INC Bourns Inc. D4B D5A.10UF 100V CERAMIC X7R CAP . C301 CONN1 CP1A. Digikey P/N 445-2325-1-ND 490-5025-1-ND 495-1311-ND PCC2239CT-ND 495-1315-ND 445-2686-1-ND ED2355-ND 493-1058-ND Vendor TDK Corporation Murata Electronics EPCOS Inc Panasonic . CP4B. JW9 L1A.50MM 3POS PCB CAP 22UF 25V ELECT VR RADIAL Designator C2A.1UF 10V SL 5% TERMINAL BLOCK 7. C10B.47uF. CP2A. CP5B. JW10 JW3 JW5 JW6. C6B. or ICE Components.47UF 400V METAL POLYPRO CAP CER 0. D6A. Inc. C8B. D5B. Dual MOSFET TO-220-5 MOSFET P-CH 45V 90MA Aluminum heat spreader Wire Jumper insulated Wire Jumper insulated Wire Jumper insulated Wire Jumper insulated Wire Jumper insulated Wire Jumper insulated Class D Inductor. JW7 JW8.ECG Lite-On Inc Diodes Inc ON Semiconductor Diodes Inc ON Semiconductor International Rectifier Zetex Inc Custom made Custom Custom Custom Custom Custom Custom Inductors. D1B D3A.100V 330uF.250V 0. 10V ED365/3 22uF Description CAP CER 1000PF 250V C0G 5% CAP CER 150PF 250V U2J CAP . 10V Red LED 1N4148WS MURA120T3G BAV19WS MURA120T3G IRFI4019H117P BS250P Heat Sink JW-300 JW-300 JW-1500 JW-1500 JW-1800 JW-2000 22uH. C300.ECG EPCOS Inc TDK Corporation On Shore Technology Inc Nichicon C100. L1B 2 2 2 Blue LED 2K POT MMBT5551 LED 3MM DUAL BLUE CLEAR POTENTIOMETER FLANGE LED1A. C14A. CP2B. FET2B HS1A JW1 JW2. C7A.100V 0.400V 0. CP6A. CP4A. Q104 TRANSISTOR NPN 160V www. C7B C8A. CP8A. 400V 0. CP8B CP100 CP7B. 2 4 1 2 2 2 2 4 2 2 1 1 3 1 1 2 2 2 10uF. C4A. 0 OHM 1/8W 1% RES 10 OHM 1W 5% RES 2. IRS2092SPbF 16-Lead SOIC IC SINGLE SUPPLY OPAMP 8-SOIC DIODE ZENER 500MW 15V RHM4. R19A. R8B R11A. R29A.7R 10R 20R 10R 10.5k 10k TRANS PNP 150V 350MW SMD TRANSISTOR NPN 100V 3A RES 100K OHM 1/8W 5% RES 330 OHM 1/8W 1% RES 330 OHM CARBON FILM RES 100 OHM 1/8W 5% RES 3. R22B.0 OHM 1/8W 1% RES 10.ECG Rohm Yageo Panasonic . R31B R103 R108 R109 R112 R114A. R23B. R26B.com IRAUDAMP7S REV 1. S300 SPKR1A. Q103 Q105A. R14B. R113 R14A. R104 R17A.3K OHM 1W 5% METAL OXIDE RES 22K OHM 1/8W 5% RES 100 OHM 1/8W 5% CONN RCA JACK METAL R/A RED PCB CONN RCA JACK METAL R/A WHT PCB SWITCH SLIDE DPDT 12V . R106.ECG Rohm Rohm Rohm 4 2 2 2 2 4 4 2 2 1 1 1 1 2 2 4 2 2 2 2 2 2 1 2 1 2 4. R25B R28A.0FRCT-ND RHM20.7 OHM 1/4W 1% RES 10. R26A. R114B R115A.ECG Yageo Rohm Rohm CUI Inc CUI Inc E-Switch On Shore Technology Vishay/BC Components International Rectifier Texas Instruments ON Semiconductor www.2KERCT-ND RHM715CCT-ND RHM100KARCT-ND P100KBATB-ND RHM47KARCT-ND 1. R22A. R303 RCA1A RCA1B S1. R101.2K OHM LEADED Class D Controller.7KARCT-ND RHM47KARCT-ND RHM9.3 2 3 1 1 2 2 2 2 2 18 MMBT5401 TIP31C 100k 330 330 100R 3. R28B.3 Page 34 of 42 .irf.7K OHM 1/8W 5% RES 47K OHM 1/8W 5% RES 9. R117B. R12B R13A. R27B. R1B. Q105B R1A. Z102B R25A. R301 R302. R7B R8A.ECG Rohm Rohm Rohm Panasonic .1k 4.0CRCT-ND PT10XCT-ND RHM2.3KW-1-ND RHM22KARCT-ND RHM100ARCT-ND CP-1401-ND (Red) CP-1402-ND (White) EG1908-ND ED2354-ND BC2304-ND IR's P/N 296-2414-5-ND IRS2092SPBF MMSZ4702T1GOSCTND Rohm Rohm Rohm Panasonic . R107. R111.5K OHM 1/8W 5% RES 10K OHM 1/8W 5% Q101. R24B. MMBT5401-FDICT-ND 497-2615-5-ND RHM100KARCT-ND RHM330CRCT-ND P330BACT-ND P100ACT-ND RHM3. R3B R7A.7RCT-ND RHM10. R115B R117A.ECG Rohm Panasonic .3k 1w 22k 100 RCJ-012 RCJ-013 EG2209A ED365/2 2. R105. U1B U300 Z102A. R17B R18A.01K OHM 1/8W 1% RES METAL FILM 120K OHM 1/4W RES 100 OHM 1/8W 5% RES 7. SPKR1B TH100 U1A.0KW-1-ND P15KBACT-ND 3. R18B R20A. Q102.1KARCT-ND P4. R23A. R102.01KCCT-ND P120KCACT-ND RHM100ARCT-ND RHM7.0K OHM 1W 5% METAL OXIDE RES 15K OHM CARBON FILM 1/4W 5% RES 3. R19B.1K OHM 1/8W 5% RES 4.5KARCT-ND RHM10KARCT-ND Diodes Inc STMicroelectronics Rohm Rohm Panasonic .2k 715R 100k 100k 47k 1k 1W 15k 3.2k at 25C IRS2092SPBF TLC071CD 15V RES 4.2K OHM 1/4W 5% RES 715 OHM 1/8W 1% RES 100K OHM 1/8W 5% RES 100K OHM CARBON FILM 1/4W 5% RES 47K OHM 1/8W 5% RES 1.ECG Rohm Rohm Rohm Panasonic .0CRCT-ND RHM10. R11B R12A. R29B R30A. R13B. R110 R2A R2B R3A. R30B R31A.ECG Panasonic .0 OHM 1/4W 1% RES 20. R20B R21A.01K 120k 1% 100R 7. R118A.50MM 2POS PCB THERMISTOR NTC 2. R21B R24A. R118B R300.7k 47k 9. R27A.1A L=4 TERMINAL BLOCK 7. 1W 2. irf.6V DIODE ZENER 375MW 68V DIODE ZENER 500MW 39V Z100 Z101 568-3782-1-ND BZT52C39-TPMSCTND DIODE ZENER 500MW 5.3 Page 35 of 42 . Z103B. Z104A.1 1 4 68V 39V 5. BZT52C5V6Z104B TPMSCT-ND Note all ½ W and 1W resistors are flame proof part numbers NXP Semiconductors Micro Commercial Co Micro Commercial Co www.6V Z103A.com IRAUDAMP7S REV 1. 3 Page 36 of 42 .2 . Screw 6. Screw 10. Screw 2. Lock washer 5 PCB 1 Screw 1.PCB SCREW MACHINE PHILLIPS 4-40X5/16 STANDOFF HEX 440THR . Lock washer 4. Stand Off 3. Screw 12 Stand Off 1.500" ALUM. Stand Off 4 Stand Off 5 TO-220 mounting kit 1 H343ND 1893KND 8401KND Newuark 82K609 6 Digikey P/N H729ND Vendor Building Fastener s Custom Building Fastener s Keystone Electronics Keystone Electronics Thermalloy 12 4 1 1 www. Chassis GND Thermalloy TO-220 mounting kit with screw Designator Lock washer 1.5" AAVID 4880G Description WASHER LOCK INTERNAL #4 SS Print Circuit Board IRAUDAMP7S_Rev 2.500"L ALUM STANDOFF HEX M/F 440 . Screw 9.Table 4 IRAUDAMP7S Mechanical Bill of Materials Quantit y 5 1 Value Washer #4 SS PCB Screw 440X5/16 Stand off 0. Lock washer 2. Screw 4. Lock washer 3.5" Stand off 0.com IRAUDAMP7S REV 1. Stand Off 2. Screw 3. Screw 7. Screw 8. Screw 5.irf. Screw 11. 2 k (23 A) 75 k 91 V MMSZ5270BT1G OSCT-ND 51 V MMSZ5262BT1G OSCT-ND N/A Zener Digikey P/N Zener Digikey P/N (Trip level) (Trip level) Stereo Stereo Bridged Notes +B.7 k 1. -B ±B Voltage Range Gain R8A.Table 5 IRAUDAMP7S Models Differential Table Model Name Item IR Power MOSFE TS Half Bridge Output Full Bridge Output Power Supply Audio Gain Feedbac k +VAA -VSS AMP7S-55 FET1 8Ω 4Ω 8Ω IRFI4024H-117P 25 W x 2 50 W x 2 100 W x 1 ±25 V ±3 V 20 68k 1 k.3 k (20 A) 0.R8 B R117A* R117B* R118A* R118B* R114A* R114B* R115A R115B R12A R12B R18A R18B R17A R17B Z100 Z101 D5A D5B D6A D6B VCC OCSET CSH VB OVP UVP Clampin g Diode * Marked components are axial. 1 W 2.1 k (29A) 47 k 68 V 568-3782-1-ND 39 V BZT52C39TPMSCT-ND IMURA120T3OS CT-ND AMP7S-200 IRFI4020H-117P 250 W x 2 N/A N/A ±70 V ±10 V 40 130 k 5. 1 W 10 k 3. and flame proof type.3 Page 37 of 42 .1 k (23 A) 8.7 k (23A) 33 k 47 V MMSZ5261BT1GO SCT-ND 30 V MMSZ5256BT1GO SCT-ND MURA120T3OSCTND AMP7S-150 IRFI4019H-117P 125 W x 2 250 W x 2 500 W x 1 ±50 V ±8 V 36 120k 3. 1 W 1 k.3 k.2 k. www. 1 W 220.com IRAUDAMP7S REV 1.2 k 1 W 20 k 5.1 W 4.0 (20A) 20 k 24 V BZT52C24TPMSCT-ND 12 V MMSZ5242BT1GO SCT-ND MURA120T3OSCTND AMP7S-100 IRFI4212H-117P 60 W x 2 120 W x 2 240 W x 1 ±35 V ±5 V 30 100k 2. ¼ w.9 k (23 A) 4. 1 W 15 k 7.irf.1 k.2 k.5 k (30 A) 9. 1 W 1 k. 1 W 3.3 k.1 k. 1 W 5. 1 W 100. 1 W 2. ±5 %. IRAUDAMP7S Hardware Heat sink Put silicone grease between the heat spreader and TO-220-5 Heatsink threaded Screw Lock washer Flat Washer #4 Dual FET TO-220-5 Heatsink threaded PCB Lock washer Screws H343-ND Screw Lock washers H729-ND Fig 36 Dual MOSFET Mounting Heat Sink TO-220 Pad insulator Shoulder Washer Heatsink threaded Screw Lock washer Flat Washer #4 TO-220 Heatsink threaded PCB Lock washer Lock washers H729-ND Screws H343-ND Screw Fig 37 +VCC Regulator TO-220 Mounting www.3 Page 38 of 42 .irf.com IRAUDAMP7S REV 1. com IRAUDAMP7S REV 1.3 Page 39 of 42 .irf. Screw H343-ND Lock washer incert thermistor into this hole and put silicone grease Screw H343-ND Lock washer Screw H343-ND Lock washer Stand Off 3 1893K-ND Screw H343-ND Lock washer Lock washer Stand Off 2 1893K-ND Lock washer Screw Stand Off 4 1893K-ND Lock washers H729-ND Screws H343-ND GND Standoff Screw Stand Off 5 8401K-ND Stand Off 1 1893K-ND Fig 39 Hardware Assemblies www.Fig 38 Heat Spreader . gto 3.txt 10. 7. . 2.gg1 9. . .apr Bottom copper. 4.csv 16. .bom 13.000 + 0. .pcb 12. Mechanical Drill Drawing Drill locations CNC data Apertures data Additional files for assembly that may not be related with Gerber files: 11.003” 11.3 Page 40 of 42 . 6.sch 15. 3. . PCB acceptance criteria as defined for class II PCB’S standards. . . Tolerance of PCB size shall be 0. All exposed copper must finished with TIN-LEAD Sn 60 or 63 for 100u inches thick.lib PCB file Bill of materials Components locations Schematic Pick and Place Components Net List Back up files PCB libraries www. . Gerber Files Apertures Description: All Gerber files stored in the attached CD-ROM were generated from Protel Altium Designer Altium Designer 6. . 8. bottom side Top silk screen Bottom silk screen Bottom Solder Mask Keep Out. . . . 9.cpl 14. Each file name extension means the following: 1.010 –0. Single Layers SMT PCB with through holes 1/16 thickness 2/0 OZ Cu FR4 material 10 mil lines and spaces Solder Mask to be Green enamel EMP110 DBG (CARAPACE) or Enthone Endplate DSR-3241or equivalent.gbs 5.irf.gd1 8. . 5.gbo 4.IRAUDAMP7S PCB Specifications PCB: 1.gko 6. . . . Tolerance of all Holes is -.com IRAUDAMP7S REV 1.bak 18. Top Silk Screen to be white epoxy non conductive per IPC–RB 276 Standard.gbl 2.000 inches 10. .net 17.gm1 7. com IRAUDAMP7S REV 1.irf.Fig 40 IRAUDAMP7S PCB Top Overlay (Top View) Fig 41 IRAUDAMP7S PCB Bottom Layer (Top View) www.3 Page 41 of 42 . El Segundo.3 Page 42 of 42 ..3 Changes description Released ROHS Compliant(BOM updated) BOM updated :Ice Components as a second vender of the inductor Date Sep.Revision changes descriptions Revision Rev 1.1 Rev 1. 29 2009 October 28. California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 08/29/2008 www.com IRAUDAMP7S REV 1. 2009 WORLD HEADQUARTERS: 233 Kansas St.2 Rev 1.irf. 03 2008 May.
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