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Rohm Semiconductor Electronic Components Datasheet

BD9415FS Datasheet

White LED Driver

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LED Driver for LCD Backlights
White LED Driver for 4Ch Large LCD Panels
(DC/DC converter type)
BD9415FS
1.1 General Description
BD9415FS is a high efficiency driver for white LEDs and
designed for large LCDs. This IC has a built-in boost
DC/DC converter that employs an array of LEDs as the
light source. BD9415FS has various protection functions
against fault conditions, such as over-voltage protection
(OVP), over current limit protection of DC/DC (OCP),
short circuit protection (SCP), over duty protection
(ODP) and open detection of LED string. Therefore,
BD9415FS is available for the fail-safe design over a
wide range of output voltages.
Key Specifications
Operating power supply voltage11.5V to 35.0V
Oscillator frequency
500kHz(RT=30kΩ)
Operating current
6.2mA (Typ)
Operating temperature range-40°C to +105°C
1.2 Package
SSOP-A32
W(Typ) x D(Typ) x H(Max)
13.60mm x 7.80mm x 2.01mm
Pin pitch 0.80mm
Features
4Ch LED constant current driver (external FET)
Built-in boost DC/DC converter (external FET)
PWM dimming (individual input terminal of 4ch)
Analog dimming (Linear) function
Low heat generation technology
LED protection function (Open/Short protection)
Output Short Protection (OCP)
Over Duty Protection (ODP)
Over Voltage Protection (OVP)
Under Voltage Lockout Protection (UVLO)
Auto restart function
Applications
TV, Computer Display, Notebook, LCD Backlighting.
Figure 1. SSOP-A32
Typical Application Circuit
+
VIN
VCC
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
REG90
Figure 2. Typical Application Circuit
Product structure : Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product not designed protection against radioactive rays
1/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD9415FS Datasheet

White LED Driver

No Preview Available !

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
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/30
TSZ02201-0F2F0C100140-1-2
23.May.2016 Rev.001


Part Number BD9415FS
Description White LED Driver
Maker ROHM
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