FCBS0550 データシートの表示（PDF） - ON Semiconductor

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FCBS0550

Smart Power Module (SPM)

ON Semiconductor 

Time Charts of SPMs Protective Function

Low-Side

Input Signal

Protection

Circuit State

RESET

SET

UVCCR

Low-Side Control

a1

Supply Voltage

UVCCD

a3

a2

a4

Low-Side Output Current

RESET

a6

a7

Fault Output Signal

a5

a1 : Control supply voltage rises: After the voltage rises UVCCR, the circuits start to operate when next input is applied.

a2 : Normal operation: MOSFET ON and carrying current.

a3 : Under voltage detection (UVCCD).

a4 : MOSFET OFF in spite of control input condition.

a5 : Fault output operation starts.

a6 : Under voltage reset (UVCCR).

a7 : Normal operation: MOSFET ON and carrying current.

Figure 6. Under-Voltage Protection (Low-side)

High-Side Input Signal

Protection

Circuit State

RESET

UVBSR

High-Side Control

b1

Supply Voltage

UVBSD

b2

SET

b3

b4

High-Side Output Current

Fault Output Signal High-level (no fault output)

RESET

b5

b6

b1 : Control supply voltage rises: After the voltage reaches UVBSR, the circuits start to operate when next input is applied.

b2 : Normal operation: MOSFET ON and carrying current.

b3 : Under voltage detection (UVBSD).

b4 : MOSFET OFF in spite of control input condition, but there is no fault output signal.

b5 : Under voltage reset (UVBSR)

b6 : Normal operation: MOSFET ON and carrying current

Figure 7. Under-Voltage Protection (High-side)

FCBS0550 Rev. A

9

www.fairchildsemi.com

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