UBA3070
LED backlight driver IC
Rev. 3 — 9 December 2010 Product data sheet
1. General description
The UBA3070 driver I...
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: Under
Voltage 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...