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IRAUDAMP9 Datasheet(PDF) 6 Page - International Rectifier |
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IRAUDAMP9 Datasheet(HTML) 6 Page - International Rectifier |
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6 / 39 page  www.irf.com IRAUDAMP9 REV 2.0 Page 6 of 39 Connector Description CH1 IN J7 Analog input for CH1 POWER J3 Positive and negative supply (+B / -B) CH1 OUT J1 Output for CH1 EXT CLK J6 External clock sync DCP OUT J8 DC protection relay output Test Procedures Test Setup: 1. Connect 2 Ω - 3000 W dummy loads to the output connectors (J1 as shown on Figure 1). 2. Connect the Audio Precision Analyzer (AP) signal Generator output to J7. 3. Initially set the voltages of the dual power supplies to ±75V with current limits to 0.5 A. 4. Make sure to TURN OFF the dual power supplies before connecting to the unit under test (UUT). 5. Set switch S1 to middle position (self oscillating). 6. Set volume level knob R130 fully counter-clockwise (minimum volume). 7. Connect the dual power supply to J3 as shown in Figure 1. Power up: 8. Turn ON the dual power supply. The ±B supplies must be applied and removed at the same time. 9. Red LED (Protection) should turn on almost immediately and turn off after about 3s. 10. Green LED (Normal) then turns on after the red LED is extinguished and should stay ON. 11. Note the quiescent current for the positive supply should be 67mA ±10mA at +75V. 12. Quiescent current for the negative supply should be 105mA ±15mA at –75V. 13. Push switch S3 (Trip and Reset push-button) to restart the LEDs sequence, which should be the same as noted above in steps 9 and 10. Switching Frequency test 14. Monitor switching waveform at VS1/J4 (pins 9-12) of CH1 on Daughter Board using an oscilloscope. 15. For IRAUDAMP9, the self-oscillating switching frequency is pre-calibrated to 300 kHz. To modify the IRAUDAMP9 frequency, adjust the potentiometer P1 for CH1. |
Similar Part No. - IRAUDAMP9 |
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Similar Description - IRAUDAMP9 |
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