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Numéro de référence | UBA3070T | ||
Description | LED backlight driver IC | ||
Fabricant | NXP Semiconductors | ||
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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 driver required for PWM dimming
Operates with smaller inductor then a comparable fixed-frequency Continuous
Conduction Mode (CCM) controller
3. Applications
The UBA3070 is suitable for high voltage LED lighting application:
LED backlighting in LCD televisions and monitors
General lighting applications
The UBA3070 application is most efficient when driving long LED strings
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Pages | Pages 16 | ||
Télécharger | [ UBA3070T ] |
No | Description détaillée | Fabricant |
UBA3070 | LED backlight driver IC | NXP Semiconductors |
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