BD9415FS Datasheet, PDF (2/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

BD9415FS
1.3 Pin Configuration
1 _VCC
2 _FAILB
3 UVLO
4 REG90
5 STB
6N
7 _PGND
8 CS
9 DUTYON
10 OVP
11 _S1
12 LED1
13 _G1
14 S2
15 _LED2
16 _G2
AGND ³²
SSFB ³¹
RT 30
DUTYP 29
PWM4 28
PWM3 27
PWM2 26
PWM1 25
LSP 24
VREF ²³
G4 ²²
LED4 ²¹
S4 ²⁰
G3 ¹⁹
LED3 ¹⁸
S3 ¹⁷
Figure 3. Pin Configuration
1.4 Pin Descriptions
Pin
No.
Pin Name
Function
1
VCC Power supply terminal
2
FAILB Error detection output pin (open drain)
3
UVLO Under voltage lockout detection pin
4
REG90 9.0V output voltage pin
5
STB IC ON/OFF pin
6
N
DC/DC switching output pin
7
PGND Power GND
8
CS
DC/DC output current detect pin,
OCP input pin
9 DUTYON Over duty protection ON/OFF pin
10
OVP Over voltage protection detection pin
11
S1
CH1 current detection input pin
12
LED1 CH1 LED output pin
13
G1
CH1 dimming signal output pin
14
S2
CH2 current detection input pin
15
LED2 CH2 LED output pin
16
G2
CH2 dimming signal output pin
Pin
Pin
No. Name
32 AGND Analog GND
Function
31 SSFB Soft start pin & Error amplifier pin
30
RT DC/DC switching frequency setting pin
29 DUTYP Over voltage protection setting pin
28 PWM4 LED4 External PWM dimming signal input pin
27 PWM3 LED3 External PWM dimming signal input pin
26 PWM2 LED2 External PWM dimming signal input pin
25 PWM1 LED1 External PWM dimming signal input pin
24
LSP LED short voltage setting pin
23 VREF Analog dimming signal input pin
22
G4 CH4 dimming signal output pin
21
LED4 CH4 LED output pin
20
S4 CH4 current detection input pin
19
G3 CH3 dimming signal output pin
18
LED3 CH3 LED output pin
17
S3 CH3 current detection input pin
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TSZ22111・15・001
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TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001