BD9422EFV_15 Datasheet, PDF (1/30 Pages) Rohm – White LED Driver for large LCD panel

Datasheet
LED Drivers for LCD Backlights
White LED Driver for large LCD
panel
BD9422EFV
●General Description
BD9422EFV is a high efficiency driver for white LEDs
and designed for large LCD panel. This IC is built-in
high current drive and high responsibility type 6ch LED
drivers and 1ch boost DCDC converter. BD9422EFV
has some protect function against fault conditions,
such as the over-voltage protection (OVP), LED OPEN
and SHORT protection, the over current limit
protection of DCDC (OCP). Therefore BD9422EFV is
available for the fail-safe design over a wide range
output voltage.
●Key Specification
 Operating power supply voltage range: 9.0V to 35.0V
 Oscillator frequency:
500kHz (RT=30kΩ)
 Operating Current:
9mA (typ.)
 Operating temperature range:
-40°C to +85°C
●Applications
TV, Computer Display, Notebook, LCD Backlighting
●Typical Application Circuit
●Features
■ 6ch Constant LED drivers, available 400mA drive
per 1ch.
■ Constant current accuracy ±1.8% (IC only)
■ Each 6ch external PWM inputs can control independent
dimming .
■ Current analog (linear) dimming by VREF
■ 1ch boost controller with current mode (external FET)
■ Several protection functions
DCDC part
: OCP/OVP/UVLO/TSD
LED driver part :OPEN,SHORT detection
■ SHORT detection voltage is set by LSP terminal.
Error detection output FAIL terminal inside
(normal=Open, error=Drain)
■ Master/Slave mode inside
●Package
HTSSOP-B40
Pin Pitch:
W(Typ.) D(Typ.) H(Max.)
13.60mm x 7.80mm x 1.00mm
0.65mm
Figure 1. Typical Application Circuit
Figure 2. HTSSOP-B40
○Product structure：Silicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
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TSZ02201-0F1F0C100210-1-2
1.Sep.2015 Rev.006