NXP UBA3070

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.

Features

????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

Typical applications

• LED backlighting in LCD televisions and monitors
• The UBA3070 application is most efficient when driving long LED strings
• General lighting applications

More information

• Datasheet
• IC product information