UBA3070

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 driv...