BD9470AFM・BD9470AEFV
●Pin Numbers/Names/Functions
Pin No.
HSOP-M28 HTSSOP-B28
Pin Name
Symbol
Function
1
2
8
ISET
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
GND
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
9
3
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
4
5
6
7
8
9
FAIL
Error detection output pin
10
11
12
13
14
15
16
17
18
19
20
21
22
OVP
Overvoltage protection detection pin
LED output 6
LED6
LED5
LED4
LED_GND
LED3
LED2
LED1
UVLO
LSP
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
STB
VCC
Power supply pin
REG58
5.8V regulator output pin / Shutdown timer pin
DC/DC output current detection pin
OCP detection pin
23
2
CS
24
25
26
27
3
4
5
6
N
DCDC_GND
RT
DC/DC switching output pin
DC/DC GND pin
DCDC Drive frequency setting connection pin
Error Amp output pin
FB
Slow start/
LED protection masking time setting pin
28
7
SS
●External Component Recommended Range
Parameter
Symbol
Specification
unit
VCC pin connecting capacity
VCC pin connecting resistance
REG58 pin connecting capacity
Soft start setting capacity
0.1 ~ 100
0 ~ *1
CVCC
RVCC
C_REG
CSS
μF
kΩ
μF
μF
kΩ
kΩ
1.0~470
0.001~1.0
30~150
RT pin connection resistance range
RRT
ISET pin connecting resistance range
12.16~75
RISET
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
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