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HCPL-3160 Datasheet(PDF) 2 Page - Agilent(Hewlett-Packard) |
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HCPL-3160 Datasheet(HTML) 2 Page - Agilent(Hewlett-Packard) |
2 / 4 page 1-213 Fault Circuit Operation A typical desaturation protected IGBT gate drive application circuit using the HCPL-3160 is shown in Figure 1. The IGBT collector to emitter voltage is monitored through DDESAT. When the IGPT is on and VDESAT exceeds the internal reference voltage of 7 V the IGBT gate is “softly” turned-off by M2 to prevent large di/dt generation. The LED2 driver is also activated, which drives the internal feedback LED2 and notifies the controller of the IGBT fault by bringing the FAULT output low. The FAULT output remains low until RESET is brought low. (Note if a separate reset line is not required, RESET can be connected to Vin on the circuit board. In this case, the FAULT output will be reset on the next PWM cycle that Vin goes low.) The FAULT output is an open collector which allows the FAULT outputs from all the HCPL-3160s in a drive to be connected together in a “wired OR” forming VCC1 Q R Q S SHIELD GND FAULT RESET VIN ENABLE VCC1 LED1+ LED1– GND BUFFER IC LED1 R Q S Q D R I V E R – + + – + – + – + – VCC2 + – VEE 0.1 µF VE DDESAT VE RG CBLANK TRIPLE DARLINGTON UVLO ICHG IDSCHG Q1 VE VE 7 V DESAT M2 1X VE VUVLO 12 V/11 V VE LED2 SHIELD R2 (OPTIONAL) M1 33X A3 LED2 DRIVER DETECTOR IC HCPL-3160 Figure 1. IGBT Gate Drive with Desaturation Protection and Fault Feedback. a single fault bus for interfacing with the micro-controller. The ENABLE input can also be connected to this fault bus. With this connection all IGBTs in a drive are shutdown without micro-controller intervention once a fault is detected on a single IGBT. CBLANK disables the fault detection circuitry for a time period sufficient for normal IGBT turn-on. CBLANK is held low by Q1 when the IGBT is off. |
Similar Part No. - HCPL-3160 |
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Similar Description - HCPL-3160 |
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