Time Charts of SPMs Protective Function
Input Signal
Protection
RESET
SET
RESET
Circuit State
UVCCR
a1
a6
UVCCD
Control
a3
a4
Supply Voltage
a2
a7
Output Current
a5
Fault Output Signal
a1 : Control supply voltage rises: After the voltage rises UVCCR, the circuits start to operate when next input is applied.
a2 : Normal operation: IGBT ON and carrying current.
a3 : Under voltage detection (UVCCD).
a4 : IGBT OFF in spite of control input condition.
a5 : Fault output operation starts.
a6 : Under voltage reset (UVCCR).
a7 : Normal operation: IGBT ON and carrying current.
Figure 6. Under-Voltage Protection (Low-side)
Input Signal
Protection
RESET
SET
RESET
Circuit State
UVBSR
b5
b1
UVBSD
b2
Control
b3
b4
Supply Voltage
b6
Output Current
High-level (no fault output)
Fault Output Signal
b1 : Control supply voltage rises: After the voltage reaches UVBSR, the circuits start to operate when next input is applied.
b2 : Normal operation: IGBT ON and carrying current.
b3 : Under voltage detection (UVBSD).
b4 : IGBT OFF in spite of control input condition, but there is no fault output signal.
b5 : Under voltage reset (UVBSR
)
b6 : Normal operation: IGBT ON and carrying current
Figure 7. Under-Voltage Protection (High-side)
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FSBB20CH60 Rev. C
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