BD9412F_15 Datasheet, PDF (1/28 Pages) Rohm – PFC Direct current resonance type White LED Driver for Large LCD

Datasheet
PFC Direct current resonance type
White LED Driver for Large LCD
BD9412F
General Description
BD9412F is a current resonance type LED Driver with
frequency-controlled LED current. It can connect to PFC
directly and can use half-bridge structure reducing the
number of external components.
It incorporates some protection functions against fault
conditions such as Over-Voltage Protection, LED Short
Detection (IS High Detection) and LED Open Detection
(IS Low Detection).
Features
 20V High Rating Process
 1 Channel Push-pull Control
 Current and Voltage Feedback by Driving
Frequency
 Adjustable Soft Start
 Adjustable Timer Latch
 Under-Voltage Detection for IC’s Power Line
 Output Over-Voltage Protection
 Output Error Signal from FAIL Terminal
 Shift to Save Mode by STB Terminal
 Burst Control by External PWM Signal
 Analog Dimming by External DC Signal
 Conversion Function from Pulse to DC
Applications
 TV, Computer Display, LCD Backlighting.
Typical Application Circuit
Key Specifications
 Operating Power Supply Voltage Range:
9.0V to 18.0V
 Oscillator Frequency:
60kHz (RRT=100kΩ)
 Operating Current:
2.3mA (Typ)
 Operating Temperature Range: -40°C to +85°C
Package
SOP18
W(Typ) x D(Typ) x H(Max)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
Figure. 1 SOP18
VCC
GND ^GND
PDIM
STB
PWM
ERR
VCC
PDIM
ON/OFF
PWMIN
FAIL
< Primary Side >
PVIN
GND
T1
PDIM
FAIL
5V
VCC
ON/OFF
PWMIN
BD9412F
< Secondary Side >
Figure. 2 Typical Application Circuit(s)
〇Product structure : Silicon monolithic integrated circuit
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0F5F0C100070-1-2
12.Aug.2015 Rev.002