UBA2071_A_1

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 23 June 2008

3 of 35

NXP Semiconductors

UBA2071; UBA2071A

Half bridge control IC for CCFL backlighting

[1]

Given frequency is switching frequency of GL and GH. Sawtooth frequency on CF pin is twice as high.

[2]

Can be set by external capacitor

[3]

PWMD is active low: A low level on the PWMD pin corresponds with lamps-on. Example:

δ

means PWMD is during 20 % of each cycle low and the lamps are 20 % of the time on, resulting in a light

output of 20 %.

5.

Ordering information

overvoltage

threshold voltage on

pin VFB

2.40

2.50

2.60

V

fault time-out time

0.85

1.00

1.15

s

driver source

current

−105

−90

−75

mA

driver sink

resistance

13.5

16.0

18.5

Ω

PWM frequency

[1] 75

-

1000

Hz

duty cycle on pin

PWMD

[3] 12

-

100

%

Table 1.

Quick reference data.

otherwise specified. All voltages are measured with respect to signal ground (SGND, pin 10). SGND

and PGND connected together. Currents are positive when flowing into the IC.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 2.

Ordering information

Type number

Package

Name

Description

Version

UBA2071T

SO24

plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

UBA2071AT

SO24

plastic small outline package; 24 leads; body width 7.5 mm

SOT137-1

UBA2071TS

SSOP24

plastic shrink small outline package; 24 leads;

body width 5.3 mm

SOT340-1

UBA2071ATS

SSOP24

plastic shrink small outline package; 24 leads;

body width 5.3 mm

SOT340-1