BD9394FP Datasheet, PDF (2/31 Pages) Rohm – White LED Driver for large LCD Panels (DCDC Converter type)

BD9394FP, BD9394EFV
Datasheet
●Absolute maximum ratings (Ta=25℃)
Parameter
Symbol
Ratings
Unit
Power supply voltage
VCC
36
V
STB, NADIM, OVP, PWM terminal voltage
STB, NADIM, OVP, PWM
VCC
V
LED1 to 4 terminal voltage
LED1~4
60
V
AUTO, REG58, CS, N, LSP, ISET, SS, FB, RT
terminal voltage
AUTO, REG58, CS, N, LSP,
ISET, SS, FB, RT
7
V
Power dissipation 1(HSOP20)
Pd1
2.18 *1
W
Power dissipation 2(HTSSOP-B24)
Pd2
4.00 *2
W
Operating temperature range
Topr
-40~+85
℃
Storage temperature range
Tstg
-55~+150
℃
Junction temperature
Tjmax
150
℃
*1 Ta = 25°C or more, diminished at -17.4mW/°C in the case of HSOP20 (when 4-layer / 70.0 mm x 70.0 mm x 1.6 mm board is mounted)
*2 Ta = 25°C or more, diminished at -32.0mW/°C in the case of HTSSOP-B24 (when 4-layer / 70.0 mm x 70.0 mm x 1.6 mm board is mounted)
●Operating Ratings (Ta = 25℃)
Parameter
Symbol
Limits
Unit
VCC supply voltage
VCC
9.0~35.0
V
Min. output current of LED1 to 4
Max. output current of LED1 to 4
Min. output current of LED1 to 4
ILED_MIN
ILED_MAX
VNADIM1
30
150
0~5.0 *3
mA *1
mA
*1,2
V
Max. output current of LED1 to 4
VNADIM2
7.0~35.0
V
DC/DC oscillation frequency
VLSP
0.8～3.0
V
DC/DC oscillation frequency
Fsw
100~800
kHz
Min. on-duty time for PWM light modulation
PWM_MIN
30
us
*1 The amount of current per channel.
*2 If LED makes significant variations in its reference voltage, the driver will increase power dissipation, resulting in a rise in package temperature.
To avoid this problem, design the board with thorough consideration given to heat radiation measures.
*3 The range which the LED current changes with linearity is from 1.5V to 5V.
●Pin Configuration
HSOP20
1
AUTO
2
REG58
3
CS
4
N
5
DCDC_GND
VCC
20
NADIM
19
RT
18
FB
17
SS
16
HTSSOP-B24
6
LSP
7
OVP
8
LED1
9
LED2
10
LED_GND
ISET
15
PWM
14
LED4
13
LED3
12
STB
11
Fig.3 Pin Configuration
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TSZ22111・15・001
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TSZ02201-0F1F0C100180-1-2
09.Nov.2012 Rev.002