BM2P034 datasheet(13/19 Pages) ROHM

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Datasheet

BM2PXX4 Series

TSZ02201-0F2F0A200070-1-2

28.NOV.2012.Rev.003

www.rohm.com

TSZ22111・15・001

●Operation mode of protection circuit

Operation mode of protection functions are shown in table2.

Table2

Operation mode of protection circuit

Function

Operation mode

VCC Under Voltage Locked Out

Auto recovery

VCC Over Voltage Protection

Auto recovery

TSD

Latch（with 100us timer）

FB Over Limited Protection

Auto recovery（with 64ms timer）

SOURCE Short Protection

Auto recovery

SOURCE Open Protection

Auto recovery

●Sequence

The sequence diagram is show in Fig 16.

All condition transits OFF Mode VCC<8.2V

Figure 16. The sequence diagram

13.5V

Soft Start 1

ALL MODE

Time>2.0ms

Soft Start

Time>8.0ms

FB<0.40V

Burst MODE

(Pulse OFF )

FB>0.40V

Normal MODE

OFF MODE

OLP MODE

(Pulse Stop )

FB>2.80V

FB<2.60V

LATCH OFF MODE

(Pulse Stop )

Temp>145℃

VCC<7.7V

VCC<8.2V

Time>0.5ms

Soft Start 2

Time>1.0ms

Soft Start 3

PULSE OFF

FB>2.80V

(32ms)

FBOLP

OFF TIMER

(512ms)

VCC OVP

(Pulse Stop )

VCC>27.5V

VCC<23.5V

SOURCE OPEN

(Pulse Stop )

OPEN

NORMAL

SOURCE SHORT

(Pulse Stop )

NORMAL

SHORT

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