FNB43060T2 Datasheet, PDF (11/15 Pages) Fairchild Semiconductor – Motion SPMR 45 Series

Time Charts of Protective Function
Input Signal
Protection
Circuit State
Control
Supply Voltage
RESET
SET
UVDDR
a1
UV_DDD
a3
a2
a4
RESET
a6
a7
Output Current
a5
Fault Output Signal
Figure 11. Under-Voltage Protection (Low-Side)
a1 : Control supply voltage rises: After the voltage rises UV_DDR, the circuits start to operate when next input is applied.
a2 : Normal operation: IGBT ON and carrying current.
a3 : Under voltage detection (UV_DDD).
a4 : IGBT OFF in spite of control input condition.
a5 : Fault output operation starts with a fixed pulse width.
a6 : Under voltage reset (UV_DDR).
a7 : Normal operation: IGBT ON and carrying current by triggering next signal from LOW to HIGH.
Input Signal
Protection
Circuit State
Control
Supply Voltage
RESET
UV_BSR
b1
UV_BSD
b2
SET
b3
b4
RESET
b5
b6
Output Current
High-level (no fault output)
Fault Output Signal
Figure 12. Under-Voltage Protection (High-Side)
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 by triggering next signal from LOW to HIGH.
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11
FNB43060T2 Rev.1.1
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