UBA3070T NXP [NXP Semiconductors], UBA3070T Datasheet
UBA3070T
Manufacturer Part Number
UBA3070T
Description
LED backlight driver IC
Manufacturer
NXP [NXP Semiconductors]
Datasheet
1.UBA3070T.pdf
(13 pages)
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1. General description
2. Features
3. Applications
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.
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UBA3070
LED backlight driver IC
Rev. 02 — 2 December 2008
Switch-mode buck controller that drives strings of LEDs up to 600 V power-efficiently
Controller with power-efficient boundary conduction mode of operation:
Direct Pulse Width Modulation (PWM) dimming available
Fast transient response through cycle-by-cycle current control, thereby:
Single loosely controlled input voltage required for all LED strings in RGB backlights
No binning on LED forward voltage required
Protections:
Low cost LED driver solution:
The UBA3070 is typically suited as a high voltage LED backlighting application in LCD
televisions and monitors (See
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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
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
Undervoltage lockout
Leading edge blanking
Overcurrent
Overtemperature
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
Figure
1)
Product data sheet
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