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UBA2071AT/N1,118

Description
Display Driver and Controller CCFL DRVR 14V 24-Pin
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size174KB,36 Pages
ManufacturerNXP
Websitehttps://www.nxp.com
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UBA2071AT/N1,118 Overview

Display Driver and Controller CCFL DRVR 14V 24-Pin

UBA2071AT/N1,118 Parametric

Parameter NameAttribute value
Brand NameNXP Semiconductor
MakerNXP
Parts packaging codeSOP
package instruction7.50 MM, PLASTIC, MS-013, SOT137-1, SOP-24
Contacts24
Manufacturer packaging codeSOT137-1
Reach Compliance Codecompliant
UBA2071; UBA2071A
Half bridge control IC for CCFL backlighting
Rev. 01 — 23 June 2008
Product data sheet
1. General description
The UBA2071 and UBA2071A are high voltage ICs intended to drive Cold Cathode
Fluorescent Lamps (CCFLs) or External Electrode Fluorescent Lamps (EEFLs) for
backlighting applications. They can drive a half bridge circuit made up of two NMOSFETs
with a supply voltage of up to 550 V, so the inverter can be supplied directly from a 400 V
PFC bus.
The UBA2071 and UBA2071A contain a controller, a level shifter, a bootstrap diode and
drivers for the external half bridge power switches. It also contains a low frequency PWM
generator, which can be used to control the brightness level of the lamps, using an analog
brightness/dimming control voltage. PWM dimming can also be realized, using a digital
PWM input signal. PWM dimming can be synchronized with other ICs. The lamp current is
controlled by means of a true zero voltage switching resonant control principle, ensuring
lowest possible switch losses in the half bridge power structure.
The UBA2071 is designed to be supplied by a
∆V/∆t
supply from the half bridge circuit that
it drives. The IC itself needs little current and if the IC is off, a clamp protects the supply
voltage from getting too high.
The UBA2071A is designed to be supplied by a fixed 12 V supply. It has a lower supply
start voltage and no supply clamp.
2. Features
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Suitable for operating in a very wide inverter supply voltage range (up to 550 V DC).
Integrated level shifter.
Integrated bootstrap diode.
Lamp current control by means of a true zero voltage switching resonant control
principle.
Sample & Hold circuit, maintaining current control value during PWM lamp-off
situation.
Separately definable time constants for current control loop and PWM dimming
attack/decay setting.
Overvoltage control.
Overcurrent protection.
Ignition failure detection.
Hard switching control.
Arcing detection.
Open/short pin protections on feedback pins.
Integrated, programmable fault timer.

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Description Display Driver and Controller CCFL DRVR 14V 24-Pin Display Drivers & Controllers CCFL DRVR 14V 24-Pin
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