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ROHM Semiconductor - White LED Driver

Numéro de référence BD9409F
Description White LED Driver
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BD9409F fiche technique
Datasheet
LED Drivers for LCD Backlights
1ch Boost up type
White LED Driver for large LCD
BD9409F
1.1 General Description
BD9409F is a high efficiency driver for white LEDs and is
designed for large LCDs. BD9409F has a boost DCDC
converter that employs an array of LEDs as the light
source.
BD9409F 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:
11.5V to 35.0V
Oscillator frequency of DCDC: 150kHz (RT=100kΩ)
Operating Current:
2.8 mA(Typ.)
Operating temperature range:
-40°C to +105°C
1.2 Package(s)
SOP16
W(Typ) x D(Typ) x H(Max)
10.00mm x 6.20mm x 1.71mm
Pin pitch 1.27mm
Features
DCDC converter with current mode
LED protection circuit (Over boost protection(FB_H),
LED OCP protection)
Over-voltage protection (OVP) for the output voltage
Vout
Adjustable soft start
Adjustable oscillation frequency of DCDC
UVLO detection for the input voltage of the power
stage
PWM Dimming and MS Dimming.
Applications
TV, Computer Display, LCD Backlighting
Figure 1. SOP16
Typical Application Circuit
VCC
VIN
Vout
VCC UVLO OVP
REG90
STB GATE
RT CS
SS
FAIL
DIMOUT
PWM
MS
ISENSE
FB
GND
Rs
Figure 2. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has not designed protection against radioactive rays
1/33
TSZ02201-0T2T0C100230-1-2
01.Nov.2016 Rev.001

PagesPages 30
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