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BD8119FM-M
● Electrical Characteristics (unless otherwise specified, V CC =12V Ta=25 ℃ )
Technical Note
Parameter Symbol
Limits
Min Typ Max.
Unit
Conditions
Circuit current
Standby current
I CC
I ST
-
-
7
4
14
8
mA
μA
EN=Hi, SYNC=Hi, RT=OPEN
PWM=Low, ISET=OPEN, C IN =10μF
EN=Low
[VREG Block (VREG)]
Reference voltage
V REG
4.5
5
5.5
V
I REG =-5mA, C REG =2.2μF
[OUTH Block]
OUTH high-side ON resistance
OUTH low-side ON resistance
Over-current protection
operating voltage
R ONHH
R ONHL
V OLIMIT
1.0
0.5
V CC
-0.66
3
2
V CC
-0.6
4.5
3.0
V CC
-0.54
Ω
Ω
V
I ON =-10mA
I ON =10mA
[OUTL Block]
OUTH high-side ON resistance
OUTH low -side ON resistance
R ONLH
R ONLL
1.0
0.5
3
2
4.5
3.0
Ω
Ω
I ON =-10mA
I ON =10mA
[SW Block]
SW low -side ON resistance
R ON_SW
1.0
2.0
4.0
Ω
I ON_SW =10mA
[Error Amplifie Block]
LED voltage
V LED
0.9
1.0
1.1
V
COMP sink current
COMP source current
I COMPSINK
I COMPSOURCE
15
-35
25
-25
35
-15
μA
μA
V LED =2V, Vcomp=1V
V LED =0V, Vcomp=1V
[Oscillator Block]
Oscillating frequency
f OSC
250
300
350
KHz
R T =100k Ω
[OVP Block]
Over-voltage detection
reference voltage
OVP hysteresis width
SCP Latch OFF Delay Time
V OVP
V OHYS
T SCP
1.9
0.45
70
2.0
0.55
100
2.1
0.65
130
V
V
ms
V OVP =Sweep up
V OVP =Sweep down
R T =100k Ω
[UVLO Block ]
UVLO voltage
UVLO hysteresis width
V UVLO
V UHYS
4.0
50
4.3
150
4.6
150
V
mV
V CC : Sweep down
V CC : Sweep up
◎ This product is not designed for use in radioactive environments.
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
2/20
2011.08 - Rev.B
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