BD93942F Datasheet, PDF (4/30 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter type)

BD93942F
Datasheet
Electrical Characteristics (Unless otherwise noted, Ta = 25^oC, VCC=24V)
Parameter
Symbol
Min.
Limit
Typ.
[DC/DC Protection Block]
Overvoltage protection detection
voltage
VOVP
2.7
3.0
Overvoltage protection detection
hysteresis voltage
VOVP_HYS
50
100
Short circuit protection detection
voltage
VSCP
0.04
0.10
[LED Driver Block]
LED pin current accuracy 1
dILED1
-2
-
Max.
3.3
200
0.25
2
LED pin current accuracy 2
dILED2
-3.2
-
3.2
LED pin current accuracy 3
dILED3
-4.6
-
4.6
LED pin current accuracy 4
dILED4
-8
-
8
LED pin current accuracy 5
dILED5
LED pin Leakage Current
LED open detection voltage
LED short detection voltage
ADIM pin Input Current
[STB Block]
ILLED
VOPEN
VSHORT
ILADIM
STB pin high-level voltage
STBH
STB pin low-level voltage
STBL
STB pin pull-down resistance
RSTB
[PWM Block]
PWM pin high-level voltage
PWMH
PWM pin low-level voltage
PWML
PWM pin pull-down resistance
RPWM
[Failure Indication Block (Open Drain)]
AUTO Timer
tAUTO
Abnormal Detection Timer
tCP
-3
-
3
-2.5
-
2.5
0.05
0.2
0.285
4
5
6
-2.5
-
2.5
2
-
35
-0.3
-
0.8
500
1000
1500
2
-
35
-0.3
-
0.8
180
300
420
-
0.655
-
20
Unit
Condition
V OVP=SWEEP UP
mV OVP=SWEEP DOWN
V OVP=SWEEP DOWN
%
ILED=100mA,
(ADIM=2.5V,ISET=75kΩ)
%
ILED=70mA,
(ADIM=1.75V,ISET=75kΩ)
%
ILED=50mA,
(ADIM=1.25V,ISET=75kΩ)
%
ILED=30mA,
(ADIM=0.75V,ISET=75kΩ)
%
ILED=100mA,
(ADIM=7V,ISET=75kΩ)
μA LED=60V
V LED=SWEEP DOWN
V LED=SWEEP UP
μA ADIM=3V
V STB=SWEEP UP
V STB=SWEEP DOWN
kΩ STB=3.0V
V PWM=SWEEP UP
V PWM= SWEEP DOWN
kΩ PWM=3.0V
sec RT=75kΩ
ms RT=75kΩ
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/26
TSZ02201-0F5F0C100050-1-2
12.Aug.2015 Rev.002