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1ED020I12FA2 Datasheet(PDF) 10 Page - Infineon Technologies AG |
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1ED020I12FA2 Datasheet(HTML) 10 Page - Infineon Technologies AG |
10 / 27 page 1ED020I12FA2 Single IGBT Driver IC Functional Description Data Sheet 10 Rev.3.0 2016-04-04 Figure 4 Application Example Unipolar Supply 4.3 Internal Protection Features 4.3.1 Undervoltage Lockout (UVLO) To ensure correct switching of IGBTs the device is equipped with an undervoltage lockout for both chips, refer to Figure 8. If the power supply voltage VVCC1 of the input chip drops below VUVLOL1 a turn-off signal is sent to the output chip before power-down. The IGBT is switched off and the signals at IN+ and IN- are ignored as long as VVCC1 reaches the power-up voltage VUVLOH1. If the power supply voltage VVCC2 of the output chip goes down below VUVLOL2 the IGBT is switched off and signals from the input chip are ignored as long as VVCC2 reaches the power-up voltage VUVLOH2. VEE2 is not monitored, otherwise negative supply voltage range from 0 V to -12 V would not be possible. 4.3.2 READY Status Output The READY output shows the status of three internal protection features. • UVLO of the input chip • UVLO of the output chip after a short delay • Internal signal transmission after a short delay It is not necessary to reset the READY signal since its state only depends on the status of the former mentioned protection signals. 4.3.3 Watchdog Timer During normal operation the internal signal transmission is monitored by a watchdog timer. If the transmission fails for a given time, the IGBT is switched off and the READY output reports an internal error. GND1 IN+ IN- RDY /FLT /RST VCC1 OUT VCC2 GND2 CLAMP DESAT +5V VEE2 SGND IN+ RDY FLT RST +15V NC 10R 1k 10R 220p 1µ 100n |
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