IRAUDAMP8 International Rectifier, IRAUDAMP8 Datasheet
IRAUDAMP8
Specifications of IRAUDAMP8
Related parts for IRAUDAMP8
IRAUDAMP8 Summary of contents
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... Channel Class D Audio Power Amplifier Using the IRS2093M and IRF6665 Jun Honda, Yasushi Nishimura and Liwei Zheng International Rectifier suggests the following guidelines for safe operation and handling of IRAUDAMP8 Demo board; Always wear safety glasses whenever operating Demo Board ...
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... SCHEMATIC…………………………………………………………………………………………………………. .26 IRAUDAMP8 FABRICATION MATERIALS................................................................................................... 27 IRAUDAMP8 HARDWARE ............................................................................................................................ 30 IRAUDAMP8 PCB SPECIFICATIONS........................................................................................................... 31 REVISION CHANGES DESCRIPTIONS........................................................................................................ 34 www.irf.com ...
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... Introduction The IRAUDAMP8 Demo board is a reference design which uses only one IC (IRS2093M) to derive appropriate input signals, amplify the audio input, and achieve a four-channel 120 W/ch (4Ω) half-bridge Class D audio power amplifier. The reference design demonstrates how to use the IRS2093M Class D audio controller and gate driver IC, implement protection circuits, and design an optimum PCB layout using IRF6665 DirectFET MOSFETs ...
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... No signal input =42C PCB T =54C Continuous =71C PCB At OTP shutdown @ 150 sec, T =80 =25C T =106C A PCB 3.94”(L) x 2.83”(W) x 0.85”(H) 100 mm ( (W) x 21.5 mm(H) 0.140kgm IRAUDAMP8 REV 1.0 =25C A =25C A Page ...
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... CN1 Analog input for CH2 CN1 Analog input for CH3 CN1 Analog input for CH4 P1 Positive and negative supply (+B / -B) P2 Output for CH1 P2 Output for CH2 P3 Output for CH3 P3 Output for CH4 IRAUDAMP8 REV 1.0 ,VCC INDICATOR IRF6665 250W,4ΩNon-inductive Page ...
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... Monitor the output signals at P2/P3 with an oscilloscope. The waveform must be a non distorted sinusoidal signal. 15. Observe that RMS R4A/(R3A), determines the voltage gain of IRAUDAMP8. Test Setup using Audio Precision (Ap): 16. Use an unbalanced-floating signal from the generator outputs. 17. Use balanced inputs taken across output terminals, P2 and P3. ...
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... Performance and test graphs 0.5 0.2 0.1 % 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m CH1-Blue; CH2-Yellow; CH3-Red; CH4-Cyan Fig 2 IRAUDAMP8, THD+N versus Power, Stereo, 4 Ω - 100 CH1-Blue; CH2-Yellow; CH3-Red; CH4-Cyan Fig 3 IRAUDAMP8, Frequency response www.irf.com 500m ±B Supply = ±35V, 4 Ω Resistive Load ...
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... Red Blue CH1-Blue; CH2-Yellow; CH3-Red; CH4-Cyan www.irf.com 100 200 500 CH1, 10W Output CH1, 50W Output Fig 4 THD+N Ratio vs. Frequency Fig 5, 1V output Frequency Spectrum IRAUDAMP8 REV 1.0 5k 10k 20k Page ...
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... B -70 -80 -90 -100 -110 -120 20 50 Red Blue www.irf.com No signal, Self Oscillator @ 400kHz Fig 6, IRAUDAMP8 Noise Floor . 100 200 500 CH1 – CH2, 60W CH2 – CH1, 60W Fig 7, Channel separation vs. frequency IRAUDAMP8 REV 1.0 5k 10k 20k Page ...
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... Clipping characteristics 60W / 4, 1kHz, THD+N=0.012% Measured Output and Distortion Waveforms www.irf.com Red Trace: Total Distortion + Noise Voltage 174W / 4, 1kHz, THD+N=10% Fig 8 Clipping Characteristics . IRAUDAMP8 REV 1.0 Green Trace: Output Voltage Page ...
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... Efficiency Fig 9 shows efficiency characteristics of the IRAUDAMP8. The high efficiency is achieved by following major factors: 1) Low conduction loss due to the DirectFETs offering low R 2) Low switching loss due to the DirectFETs offering low input capacitance for fast rise and fall times Secure dead-time provided by the IRS2093, avoiding cross-conduction ...
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... The pressure between DirectFET & TIM (Thermal Interface Material) is controlled by depth of Heat Spreader’s groove. Choose TIM which is recommended by details). TIM’s manufacturer thickness, conductivity, & etc. determine pressure requirement. Below shows selection options recommended: www.irf.com IR. Fig 10 TIM Information IRAUDAMP8 REV 1.0 (Refer to AN-1035 for more Page ...
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... Groove Depth=DirectFET’s Height +TIM’s Thickness*strain **DirectFET’s height should be measured from PCB to the top of DirectFET after reflow. The average height of IRF6665 is 0.6mm. Fig 11 compression deflection with constant rate of strain www.irf.com IRAUDAMP8 REV 1.0 Page ...
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... Power Supply Rejection Ratio (PSRR) The IRAUDAMP8 obtains good power supply rejection ratio of - 1kHz shown in Fig 12. With this high PSRR, IRAUDAMP8 accepts any power supply topology when the supply voltages fit between the min and max range. +0 -10 -20 -30 - -50 -60 -70 -80 ...
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... Short Circuit Protection Response Figs 13-14 show over current protection reaction time of the IRAUDAMP8 in a short circuit event. As soon as the IRS2093 detects an over current condition, it shuts down PWM. After one second, the IRS2093 tries to resume the PWM. If the short circuit persists, the IRS2093 repeats try and fail sequences until the short circuit is removed ...
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... IRAUDAMP8 Overview The IRAUDAMP8 features a 4CH self-oscillating type PWM modulator for the smallest space, highest performance and robust design. This topology represents an analog version of a second- order sigma-delta modulation having a Class D switching stage inside the loop. The benefit of the sigma-delta modulation, in comparison to the carrier-signal based modulation, is that all the error in the audible frequency range is shifted to the inaudible upper-frequency range by nature of its operation ...
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... A single stage output filter can be used with switching frequencies of 400 kHz and greater; a design with a lower switching frequency may require an additional stage of LPF. Fig 15 Simplified Block Diagram of IRAUDAMP8 Class D Amplifier www.irf.com IRAUDAMP8 REV 1 ...
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... Functional Descriptions IRS2093 Gate Driver IC The IRAUDAMP8 uses the IRS2093 Channel high-voltage (up to 200 V), high-speed power MOSFET driver with internal dead-time and protection functions specifically designed for Class D audio amplifier applications. These functions include OCP and UVP. The IRS2093 integrates bi- directional over current protection for both high-side and low-side MOSFETs ...
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... Normally, when adjusting the self-oscillating frequency of the different channels suggested to either match the frequencies accurately, or have them separated by at least 25kHz. Under the normal operating condition with no audio input signal, the switching-frequency is set around 400kHz in the IRAUDAMP8. www.irf.com IRAUDAMP8 REV 1.0 ...
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... Selectable Dead-time The dead-time of the IRS2093 is set based on the voltage applied to the DT pin. Fig 17 lists the suggested component value for each programmable dead-time between 45 and 105 ns. All the IRAUDAMP8 models use DT1 (45ns) dead-time. Dead-time Mode DT1 DT2 DT3 DT4 Recommended Resistor Values for Dead Time Selection ...
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... Fig 19 Simplified Functional Diagram of OCP www.irf.com R60 15k GND Q5 MMBT5551 Z4 R54 18V 10k R57 R51 47k 22k 5 R50 Z3 47k 4 R59 R53 39V 22k 10k R52 15k Q4 MMBT5551 R58 47k R55 47k UVP -B . IRAUDAMP8 REV 1.0 IC6 LM26CIM5-XHA GND 3 VCC VT OTP D51 4.7V Page ...
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... UVP is provided externally to the IRS2093. UVP prevents unwanted audible noise output from unstable PWM operation during power up and down. UVP shuts down the amplifier if the bus voltage between GND and -B falls below a voltage set by Zener diode Z4. www.irf.com IRAUDAMP8 REV 1.0 during its on state. DS(ON) during its on state ...
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... D2, R18 and C10 form a bootstrap floating supply for the HO gate driver. Bus Pumping When the IRAUDAMP8 is running in stereo mode, the bus pumping effect takes place with low frequency, high output. Since the energy flowing in the Class D switching stage is bi-directional, there is a period where the Class D amplifier feeds energy back to the power supply ...
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... Smaller bus capacitance (the same energy will cause a larger voltage increase) The OVP protects IRAUDAMP8 from failure in case of excessive bus pumping. 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 ...
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... Fig 21 Output Low Pass Filter and Zobel Network Gain Setting The ratio of resistors R4A~D/R1A~D in Fig 22 sets voltage gain. The IRAUDAMP8 has no on board volume control. To change the voltage gain, change the input resistor term R1A~D. Changing R4A~D affects PWM control loop design and may result poor audio performance. ...
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... R41 4 120k Q4 MMBT5551 D7 C36 R58 R32 R40 LM5007 0.01uF, 50V R55 47k 1k 100k 47k OVP UVP Fig 22 IRAUDAMP8 Schematic Page 1.0 CH3 OUTPUT L1 R24A 2.2K 22uH GND CH4 OUTPUT R24B 2.2K GND GND R24C 2.2K CH2 OUTPUT L2 22uH GND R24D 2 ...
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... IRAUDAMP8 Fabrication Materials Table 1 IRAUDAMP8 Electrical Bill of Materials Quantity Value Description CAP CER .1UF 50V 10% X7R 1 0.1uF,50V 0603 CAP CERAMIC 100PF 50V 4 100pF, 50V NP0 0603 CAP CER 2200PF 50V 10% 9 2.2nF,50V X7R 0603 CAP 1000PF 4 1nF,50V CERAMICX7R 0603 CAP 10UF 16V HA ELECT ...
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... R24D RHM2.2KARCT-ND R31 RHM5.1KARCT-ND R36 RHM5.1KGCT-ND R37, R50, R55, R56, R57, R58 RHM47KGCT-ND R41 RHM120KGCT-ND R42 RHM3.3KGCT-ND IRAUDAMP8 REV 1.0 TOKO Sumida Corporation Weidmuller On Shore Technology Inc Zetex Inc International Rectifier Diodes Inc Diodes Inc Zetex Inc Zetex Inc Panasonic - ECG ...
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... DIODE ZENER 39V 500MW 1 39V SOD-123 DIODE ZENER 500MW 18V 1 18V SOD123 DIODE ZENER 500MW 5.6V 2 5.6V SOD123 Table 2 IRAUDAMP8 Mechanical Bill of Materials Quantity Value Description WASHER LOCK 7 Washer #4 SS INTERNAL #4 SS Print Circuit Board 1 PCB IRAUDAM8M_Rev 3.0 .PCB Screw 4- ...
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... Lock washer Screw Stand Off 3 H343-ND 1893K-ND Lock washer Lock washer Lock washers Stand Off 4 H729-ND 1893K-ND Screws H343-ND Fig 24 Hardware Assemblies www.irf.com IRAUDAMP8 Heat Spreader 27 Fig 23 Heat Spreader . Thermal Pad Screw H343-ND Lock washer Screw Screw Screw Stand Off 1 1893K-ND IRAUDAMP8 REV 1 ...
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... IRAUDAMP8 PCB Specifications PCB: 1. Two Layers SMT PCB with through holes 2. 1/16 thickness 3. 2 FR4 material 5. 10 mil lines and spaces 6. Solder Mask to be Green enamel EMP110 DBG (CARAPACE) or Enthone Endplate DSR-3241or equivalent. 7. Silk Screen to be white epoxy non conductive per IPC–RB 276 Standard. ...
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... Fig 25 IRAUDAMP8 PCB Top Overlay (Top View) www.irf.com IRAUDAMP8 REV 1.0 Page ...
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... Fig 26 IRAUDAMP8 PCB Bottom Layer (Top View) www.irf.com IRAUDAMP8 REV 1.0 Page ...
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... Revision Rev 1.0 Released Rev 1.1 ROHS Compliant (BOM Updated) WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 www.irf.com Changes description Data and specifications subject to change without notice. 01/29/2009 IRAUDAMP8 REV 1.0 Date th Jan, 08 2009 th May,29 2009 Page ...