BD9415FS Datasheet, PDF (11/34 Pages) Rohm – White LED Driver for 4Ch Large LCD Panels (DC/DC converter type)

BD9415FS
3.1 Application Circuit Example
An example application using the BD9415FS.
3.1.1 Basic Application Example
+
REG90
STB
CVCC
CREG90
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
PWM4
PWM3
PWM2
PWM1
VIN
VCC
REG90
Figure 10. Basic Application Example
3.1.2 Application Example of Unused CH
+
()
REG90
STB
CVCC
CREG90
LEDunused
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
PWM4
PWM3
PWM2
PWM1
LEDunused
VCC
REG90
Figure 11. Application Example of Unused CH
When an LED terminal was unused, please dispose the unused CH as follows.
・Please input lower than 3.0V (typical) of voltage to a LEDx pin (ex. 1.0 to 2.0V).
・Gx pin, Sx pin is short
・Unused PWMx = L
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TSZ22111・15・001
11/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001