BD9285F Boost 1channel white LED driver For large LCDs
General Description
BD9285F is a high efficiency driver for white LEDs and designed for large LCDs. This IC is built-in a boost DCDC converters that employ an array of LEDs as the light source. BD9285F has some protect function against fault conditions, such as the over-voltage protection (OVP), the over current limit protection of DCDC (OCP), LED over current protection (LEDOCP), the open detection of LED string. Therefore BD9285F is available for the fail-safe design over a wide range output voltage.
Features
Current mode DCDC converter
Vout discharge circuit as shutdown
LED protection circuit (OPEN protection, LED OCP protection)
LED protect detection as small PWM dimming signal
Over-voltage protection (OVP) and low-voltage protection (SCP: short circuit protection) for the output voltage Vout
Adjustable soft start time constant
The wide range of analog dimming 0.2V-3.5V
The built-in transformation circuit from pulse to DC
2 PWM dimming signal
The UVLO detection for the input voltage of the power stage
FAIL logic output
Applications
TV, PC display and other LCD backlight system.
Key Specifications
Input voltage range: 9.0V to 18.0V
DCDC oscillation frequency: 150kHz (RT=100kΩ)
Active current consumption: 1.2mA(Typ.)
Operating temperature range: -40℃ to +85℃
Package(s)
SOP18
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