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LED背光驱动器芯片

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UBA3070
UBA3070驱动器芯片是第一代低功耗LED背光驱动器芯片的第一款产品,支持600V LED灯串驱动,具有过流、过热和欠压保护功能,是液晶电视和显示器理想的高压背光驱动器件。

厂商原文介绍:

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.

 

General description

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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.

Features and benefits
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  • Switch-mode buck controller that drives strings of LEDs up to 600 V power-efficiently
  • Controller with power-efficient boundary conduction mode of operation:
    • No reverse recovery losses in freewheel diode
    • Zero current switching for turn-on of switch
    • Zero voltage or valley switching for turn-on of switch
    • Minimal required inductance value and size
  • Direct Pulse Width Modulation (PWM) dimming available
  • Fast transient response through cycle-by-cycle current control, thereby:
    • Preventing over or undershoots in the LED current
    • Enabling efficient PWM dimming by quickly turning the converter on and off and thereby removing the need for extra dim switches and high-side drivers
  • Single loosely controlled input voltage required for all LED strings in RGB backlights
  • No binning on LED forward voltage required
  • Protections:
    • Undervoltage lockout
    • Leading edge blanking
    • Overcurrent
    • Overtemperature
  • Low cost LED driver solution:
    • No Schottky diode required because of zero-current switching
    • No dim switch and high-side driver required for PWM dimming
    • Smaller inductor possible compared to fixed-frequency continuous conduction mode controllers
Applications
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  • The UBA3070 is typically suited as a high voltage LED backlighting application in LCD televisions and monitors (See Figure 1)
Parametrics/similar products
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Type number Package package reference code Vhs [max](V) Description Remark
UBA3070T SOT96-1
(SO8)
SO8 650.0 LED backlight driver IC buck

 

Similar products

UBA3070 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

 

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