MAX4959 데이터 시트보기 (PDF) - Maxim Integrated

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MAX4959

High-Voltage OVP with Battery Switchover

Maxim Integrated 

High-Voltage OVP with Battery Switchover

VIN

VOVLO

tDEB

VGATE1

VOVLO

VUVLO

INTUVREF

VUVLO

tDEB

tBLANK

tDEB tBLANK

VDD

VDD REGULATED

VCB

VGATE2

Figure 1. Timing Diagram

The following table lists the different modes of operations:

IN RANGE

VIN > VOVLO

VUVLO < VIN < VOVLO

(debounce timeout ongoing)

P1 STATE

P1 OFF (not affected by CB)

P1 OFF (not affected by CB)

VUVLO < VIN < VOVLO

(debounce timeout elapsed)

CB = 1 -> P1 is OFF

CB = 0 -> P1 is ON

VINTUVREF < VIN < VOVLO

(blanking timeout ongoing)

CB = 1 -> P1 is OFF

CB = 0 -> P1 is ON

VINTUVREF < VIN < VOVLO

(blanking timeout elapsed)

VIN < VINTUVREF

P1 OFF (not affected by CB). P1 does not turn on again until

adapter is unplugged (VIN <~0.75V) and plugged in again.

P1 OFF (not affected by CB). P1 does not turn on again until

adapter is unplugged (VIN <~0.75V) and plugged in again.

P2 STATE

CB = 1 -> P2 is ON

CB = 0 -> P2 is OFF

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