Part Number: BD9285F

Function: Boost 1-Channel White LED Driver

Package: SOP 18 Pin Type

Manufacturer: Rohm

Images:

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.

 

Features

1. Current mode DCDC converter

2. Vout discharge circuit as shutdown

3. LED protection circuit (OPEN protection, LED OCP protection)

4. LED protect detection as small PWM dimming signal

5. Over-voltage protection (OVP) and low-voltage protection (SCP: short circuit protection) for the output voltage Vout

6. Adjustable soft start time constant

7. The wide range of analog dimming 0.2V-3.5V

8. The built-in transformation circuit from pulse to DC

9. 2 PWM dimming signal

 

Applications:

TV, PC display and other LCD backlight system.

Key Specifications:

1. Input voltage range: 9.0V to 18.0V

2. DCDC oscillation frequency : 150kHz (RT=100kΩ)

3. Active current consumption : 1.2mA(Typ.)

4. Operating temperature range : -40℃ to +85℃  […]

 

BD9285F PDF Datasheet

A dual-channel high-power LED driver is a specialized electronic device designed to control and power two separate LED channels simultaneously. This type of LED driver is commonly used in applications where independent control of two LED channels is required, such as in RGB (Red, Green, Blue) LED lighting systems, multi-color displays, or dual-color illumination setups.

Part Number: OZ9902

Function: Dual Channel High Power LED Driver

Package: SOP, SSOP 24 Pin Type

Manufacturer: O2Micro

Images:

Description

OZ9902 is a dual, high power LED driver designed to build LED backlight for largesize LCD TV applications. It integrates two independently-controlled LED drivers to achieve optimum effi ciency. The drive outputs are phase-shifted by 180 degrees to minimize current ripple in high power applications.
0Z9902 supports independent Pulse Width Modulation (PWM) dimming control for each channel and common analog dimming control for both channels. It provides system design fl exibility for LCD TV with local dimming or 3D display mode.

Features

• Dual Channel DC/DC converter

• Constant current or voltage output

• Drives one string of high power LEDs per channel

• 180 degrees phase-shift between the two driver outputs

• Independent PWM dimming control for each channel

• Analog dimming

• Constant operation frequency

• Operation frequency synchronization

• Power MOSFET over-current protection

• Over-voltage protection

• Output to return and Output to ground short-circuit protection

• Output over load protection

• Limited Current Condition (LCC) protection

• Thermal protection

• LED fault status output

Pinouts:

OZ9902 PDF Datasheet

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