LED Drivers for LCD Backlights
1ch Boost up Type
White LED Driver for large LCD
BD9411F
General Description
Key Specifications
BD9411F is a high efficiency driver for white LEDs and is
designed for large LCDs. BD9411F has a boost DCDC
converter that employs an array of LEDs as the light
source.
Operating power supply voltage range: 9.0V to 35.0V
Oscillator frequency of DCDC: 150kHz (RT=100kΩ)
Operating Current:
3.3 mA(Typ)
-40°C to +105°C
Operating temperature range:
BD9411F 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.
Package(s)
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
SOP18
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)
Figure 1. SOP18
Applications
TV, Computer Display, LCD Backlighting
Typical Application Circuit
VOUT
VCC
VIN
VCC
UVLO
OVP
REG90
STB
GATE
CS
RT
SS
FAIL
DIMOUT
PWM
ADIM
ISENSE
FB
DUTYP
Rs
DUTYON
GND
Figure 2. Typical Application Circuit
○Product structure:Silicon monolithic integrated circuit ○This product has not designed protection against radioactive rays
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TSZ02201-0T2T0C100250-1-2
20.Feb.2017 Rev.001
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