Datasheet > UBA3070_10

UBA3070_10

更新时间： 2024-02-09 18:51:35

品牌	Logo	应用领域
恩智浦 - NXP		驱动
页数	文件大小	规格书
16页	200K
描述
LED backlight driver IC No binning on LED forward voltage required

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UBA3070_10 数据手册

UBA3070

LED backlight driver IC

Rev. 3 — 9 December 2010

Product data sheet

1. General description

The UBA3070 driver IC is the first member of a first generation of power-efficient LED

backlight driver ICs. Highly efficient, flexible and reliable LED drivers can easily be

designed using the UBA3070 control IC.

2. Features and benefits

Switch-mode buck controller that drives strings of LEDs up to 600 V power-efficiently

Controller with power-efficient Boundary Conduction Mode (BCM) operation:

Virtually no reverse recovery losses in freewheel diode

Zero Current Switching (ZCS) at switch, switch-on

Zero voltage or valley switching at switch, switch-on

Minimal required inductance value and size

Suitable for direct Pulse Width Modulation (PWM) dimming

Fast transient response through cycle-by-cycle current control, thereby:

Preventing over or undershoots in the Light Emitting Diode (LED) current

Enabling efficient PWM dimming by quickly turning the converter on and off and

thus removing the need for extra dimming switches and high-side drivers

Single controlled input voltage required for all UBA3070 driven LED strings in RGB or

white backlighting units

No binning on LED forward voltage required

Protections:

UnderVoltage LockOut (UVLO)

Leading Edge Blanking (LEB)

OverCurrent Protection (OCP)

OverTemperature Protection (OTP)

Low cost LED driver solution:

No fast-switching Schottky diode required due to ZCS

No dimming switch or high-side driver required for PWM dimming

Operates with smaller inductor then a comparable fixed-frequency Continuous

Conduction Mode (CCM) controller

3. Applications

The UBA3070 is suitable for high voltage LED lighting application:

LED backlighting in LCD televisions and monitors

General lighting applications

The UBA3070 application is most efficient when driving long LED strings

12 3 4 5 6 7...16

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