FNB41560 Datasheet, PDF (11/15 Pages) Fairchild Semiconductor – Smart Power Module

Time Charts of SPMs Protective Function
Input Signal
Protection
RESET
SET
Circuit State
Control
Supply Voltage
UV_CCR
a1
UV_CCD
a3
a2
a4
RESET
a6
a7
Output Current
a5
Fault Output Signal
a1 : Control supply voltage rises: After the voltage rises UV_CCR, the circuits start to operate when next input is applied.
a2 : Normal operation: IGBT ON and carrying current.
a3 : Under voltage detection (UV_CCD).
a4 : IGBT OFF in spite of control input condition.
a5 : Fault output operation starts.
a6 : Under voltage reset (UV_CCR).
a7 : Normal operation: IGBT ON and carrying current.
Figure 11. Under-Voltage Protection (Low-side)
Input Signal
Protection
RESET
SET
Circuit State
Control
UV_BSR
b1
Supply Voltage
UV_BSD
b3
b2
b4
RESET
b5
b6
Output Current
High-level (no fault output)
Fault Output Signal
b1 : Control supply voltage rises: After the voltage reaches UV_BSR, the circuits start to operate when next input is applied.
b2 : Normal operation: IGBT ON and carrying current.
b3 : Under voltage detection (UV_BSD).
b4 : IGBT OFF in spite of control input condition, but there is no fault output signal.
b5 : Under voltage reset (UV_BSR)
b6 : Normal operation: IGBT ON and carrying current
Figure 12. Under-Voltage Protection (High-side)
FNB41560 Rev. C
11
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