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NFAM1512L7B Datasheet(PDF) 10 Page - ON Semiconductor

Part # NFAM1512L7B
Description  Intelligent Power Module (IPM) Inverter, 1200 V, 15 A
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NFAM1512L7B Datasheet(HTML) 10 Page - ON Semiconductor

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Figure 8. Under−Voltage Protection (High−Side)
Protection
Circuit State
Control Supply
Voltage
Output Current
Fault Output Signal
Input Signal
Reset
Set
Reset
UVBSR
UVBSD
b1
b2
b3
b4
b5
b6
High−level (No fault output)
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 by triggering next signal from LOW to HIGH.
Figure 9. Short Circuit Current Protection (Low−Side Operation only)
Protection
Circuit State
Internal IGBT
Emitter Voltage
Output Current
Fault Output Signal
Input Signal
Set
Reset
Sensing Voltage of
Sense Resistor
SC current
trip level
SC reference
voltage
RC filter circuit time
constant delay
c1
c3
Internal delay
at protection circuit
c4
c5
c6
c7
c8
c2
(with the external sense resistance and RC filter connection)
c1 : Normal operation: IGBT ON and carrying current.
c2 : Short circuit current detection (SC trigger).
c3 : All low−side IGBT’s gate are hard interrupted.
c4 : All low−side IGBTs turn OFF.
c5 : Fault output operation starts with a fixed pulse width.
c6 : Input HIGH: IGBT ON state, but during the active period of fault output the IGBT doesn’t turn ON.
c7 : Fault output operation finishes, but IGBT doesn’t turn on until triggering next signal from LOW to HIGH.
c8 : Normal operation: IGBT ON and carrying current.


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