BM2P074KF-G Datasheet, PDF (13/23 Pages) Rohm – PWM type DC/DC converter IC Included 800V MOSFET

BM2P074KF-G
●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
VCC Over Voltage Protection
TSD
FB Over Limited Protection
SOURCE Short Protection
SOURCE Open Protection
Auto recovery
Auto recovery
Latch（with 100us timer）
Auto recovery（with 64ms timer）
Auto recovery
Auto recovery
●Sequence
The sequence diagram is show in Fig16.
All condition transits OFF Mode VCC<9.5V
Datasheet
ALL MODE
VCC< 9.5V
OFF MODE
VCC >14.8V
Soft Start1
Time >0.5ms
Soft Start2
Time> 1.0ms
Soft Start3
Time >2.0ms
FBOLP
OFF TIMER
( 512ms)
VCC OVP
( Pulse Stop)
VCC >27.5V
Soft Start4
VCC< 23.5V ^{Time> 8.0ms}
Normal MODE
NORMAL
SOURCE OPEN
( Pulse Stop)
OPEN
Temp >145℃
FB >2.80V
PULSE OFF
FB>2.80 V
(64ms)
OLP MODE
( Pulse Stop)
FB <2.60V
FB < 0.40V
FB >0.40V
Burst MODE
( Pulse OFF)
SHORT
NORMAL
SOURCE SHORT
( Pulse Stop)
VCC < 9.5V
LATCH OFF MODE
( Pulse Stop)
Figure 16. The sequence diagram
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TSZ22111・15・001
13/19
TSZ02201-0F1F0A200270-1-2
14.Mar.2017.Rev.002