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Rohm Semiconductor Electronic Components Datasheet

BD9413F Datasheet

White LED Driver

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Datasheet
LED Drivers for LCD Backlights
1ch Boost up type
White LED Driver for large LCD
BD9413F
1.1 General Description
BD9413F is a high efficiency driver for white LEDs and is
designed for large LCDs. BD9413F has a boost DCDC
converter that employs an array of LEDs as the light
source.
BD9413F has some protect functions against fault
conditions, such as over-voltage protection (OVP), over
current limit protection of DCDC (OCP), LED OCP
protection, and Over boost protection (FBMAX).
Therefore it is available for the fail-safe design over a
wide range output voltage.
Key Specifications
Operating power supply voltage range: 9.0V to 35.0V
Oscillator frequency of DCDC: 150kHz (RT=100k)
Operating Current:
3.3 mA(Typ.)
Operating temperature range:
-40°C to +105°C
1.2 Package(s)
SOP18
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
Features
DCDC converter with current mode
LED protection circuit (Over boost protection, LED
OCP protection)
Over-voltage protection (OVP) for the output voltage
Vout
Adjustable soft start
Adjustable oscillation frequency of DCDC
Wide range of analog dimming 0.2V to 3.0V
UVLO detection for the input voltage of the power
stage
LED Dimming PWM Over Duty Protection(ODP)
Applications
TV, Computer Display, LCD Backlighting
Figure 1. SOP18
Typical Application Circuit
VCC VIN
Vout
VCC UVLO OVP
REG90
STB
GATE
RT
SS CS
FAILB
PWM
DIMOUT
ADIM
ISENSE
DUTYP
DUTYON
GND
FB
Rs
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has not designed protection against radioactive rays
1/33
TSZ02201-0F2F0C100120-1-2
28.Dec.2015 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BD9413F Datasheet

White LED Driver

No Preview Available !

BD9413F
1.3 Pin Configuration
1 VCC
2 STB
3 OVP
4 UVLO
5 SS
6 DUTYON
7 PWM
8 FAILB
9 ADIM
REG90 18
CS 17
GATE 16
DIMOUT 15
GND 14
ISENSE 13
FB 12
DUTYP 11
RT 10
Figure 3. Pin Configuration
1.4 Pin Descriptions
No. 端子名
1 VCC
2 STB
3 OVP
4 UVLO
5 SS
6 DUTYON
7 PWM
8 FAILB
9 ADIM
10 RT
11 DUTYP
12 FB
13 ISENSE
14 GND
15 DIMOUT
16 GATE
17 CS
18 REG90
機能
Power supply pin
IC ON/OFF pin
Over voltage protection detection pin
Under voltage lock out detection pin
Soft start setting pin
Over Duty Protection ON/OFF pin
External PWM dimming signal input pin
Error detection output pin
ADIM signal input pin
DC/DC switching frequency setting pin
Over Duty Protection setting pin
Error amplifier output pin
LED current detection input pin
-
Dimming signal output for NMOS
DC/DC switching output pin
DC/DC output current detect pin,
OCP input pin
9.0V output voltage pin
Datasheet
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/33
TSZ02201-0F2F0C100120-1-2
28.Dec.2015 Rev.001


Part Number BD9413F
Description White LED Driver
Maker ROHM
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