BD8160AEFV-E2 データシートの表示（PDF） - ROHM Semiconductor

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BD8160AEFV-E2

12V Input Multi-channel System Power Supply IC

ROHM Semiconductor 

BD8160AEFV

Technical Note

●Short Circuit Protection

BD8160AEFV has a short circuit protection feature to prevent the large current flowing when the output is shorted to GND.

This function is monitoring VS, VLOGIC, VGH and VGL voltage and starts the timer when at least one of the outputs is not

operating properly (when the output voltage was lower than expected) After TBD ms (Typ) of this abnormal state,

BD8160AEFV will shutdown the all outputs and latch the state.

The timer operation will be done even when BD8160AEFV starts up. Therefore, please adjust the capacitor for SS, DLY1

and DLY2 (Softstart and Delaystart) so that the all output voltage reach the expected value within the Short Circuit Protection

Time (TBD ms Typ)

VS

VLOGIC

VGH

FB

-

+

FBB

-

+

FBP

-

+

+

-

219 / 328 ms

(typ)

Counter

Reset

219 / 328 ms (Typ) of this abnormal state,

BD8160AEFV will shutdown the all outputs

and latch the state.

VIN

VS

VLOGIC

VGH

VGL

ALL SHUTDOWN & LATCH

VS is shorted

to GND

92% detection

82% detection

VLOGIC is shorted

to GND

84% detection

72% detection

80% detection

70% detection

VGH,VGL are shorted

to GND

80% detection

70% detection

Start Up time

Short Circuit Protection Time

(Start up time should be less than Short Circuit Protection Time)

Fig. 28

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© 2009 ROHM Co., Ltd. All rights reserved.

10/18

2009.07 - Rev.B

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