BD9470AEFV Datasheet, PDF (6/39 Pages) Rohm – White LED driver for medium sized and large sized LCD back light

BD9470AFM・BD9470AEFV
●Pin Numbers/Names/Functions
Pin No.
Pin Name
HSOP-M28 HTSSOP-B28
Symbol
1
8
ISET
2
9
PWM1
3
10
PWM2
4
11
PWM3
5
12
PWM4
6
13
PWM5
7
14
PWM6
8
15
GND
9
16
FAIL
10
17
OVP
11
18
LED6
12
19
LED5
13
20
LED4
14
21
LED_GND
15
22
LED3
16
23
LED2
17
24
LED1
18
25
UVLO
19
26
20
27
21
28
LSP
STB
VCC
22
1
REG58
23
2
CS
24
3
N
25
4
DCDC_GND
26
5
RT
27
6
FB
28
7
SS
Function
LED current setting resistor connection pin
PWM light modulation signal input pin for LED1
PWM light modulation signal input pin for LED2
PWM light modulation signal input pin for LED3
PWM light modulation signal input pin for LED4
PWM light modulation signal input pin for LED5
PWM light modulation signal input pin for LED6
Ground pin for analog block
Error detection output pin
Overvoltage protection detection pin
LED output 6
LED output 5
LED output 4
Ground pin for LED
LED output 3
LED output 2
LED output 1
Detection pin for Under voltage Lockout prevention
LED short-circuit protection voltage setting pin
Enable pin
Power supply pin
5.8V regulator output pin / Shutdown timer pin
DC/DC output current detection pin
OCP detection pin
DC/DC switching output pin
DC/DC GND pin
DCDC Drive frequency setting connection pin
Error Amp output pin
Slow start/
LED protection masking time setting pin
●External Component Recommended Range
Parameter
Symbol
Specification
unit
VCC pin connecting capacity
CVCC
0.1 ～ 100
μF
VCC pin connecting resistance
RVCC
0 ～ *1
kΩ
REG58 pin connecting capacity
C_REG
1.0～470
μF
Soft start setting capacity
CSS
0.001～1.0
μF
RT pin connection resistance range
RRT
30～150
kΩ
ISET pin connecting resistance range
RISET
12.16～75
kΩ
The operating conditions listed above are constants for the IC alone. To make constant setting with practical set devices, utmost attention should be paid.
*1 Please refer to 【3.2 function explanatiob and selection of external components for thes election of VCC
series resistance.
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TSZ02201-0F10C1002000-1-2
19.Oct.2013 Rev.003