FTM Board Club
NXP Semiconductors
UBA3070
LEDbacklight driver ICs Demonstration Board

The UBA3070 driver IC is the first member of a first generation of power-efficient LEDbacklight driver ICs.

Highly efficient, flexible and reliable LED drivers can easily be designed using theUBA3070 control IC.

Features

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: Under-voltage lock-out Leading edge blanking Over-current Over-temperature
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