UBA2074(A)

© NXP B.V. 2007. All rights reserved.

Preliminary data sheet

Rev. 02.0 — February 2007

21 of 33

NXP Semiconductors

UBA2074(A)

High Voltage Full-bridge control IC for CCFL backlighting

total supply current on pin VDC oscillating

[2]

5mA

total supply current on pin VDC VDC=30V; oscillating

[2]

7.5

mA

1.5

mA

2

mA

Regulated voltage on pin VDD

11.3

12

12.7

V

Regulated voltage on pin VDD

at maximum supply current

11

V

Dropout voltage VDD regulator VDC=10V; oscillating;

[2]

1.5

V

voltage drop bootstrap diode

1.5

V

Ignition

VCO frequency ratio

2.2

2.4

2.6

VCO voltage range

2.5

V

CVFB charge current

-24

-21

-18

µA

Normal operation

minimum switching frequency

43.0

44.8

46.6

kHz

minimum switching frequency

10

100

kHz

current regulation reference

level

1.24

1.32

1.40

V

minimum voltage of lineair

operating range

- 2.5

V

maximum voltage of linear

operating range

2.5

V

input impedance IFB pin

40

k

Ω

input impedance IFB pin

20

k

Ω

transconductance OTA

13

16

19

µA/V

Drivers

sourcing current of drivers

-180

-145

-110

mA

sinking resistance of drivers

7.3

Ω

non-overlap time

0.45

0.55

0.65

µs

non-overlap time

1.2

1.4

1.6

µs

PWM dimming

PWM frequency

100

1000

Hz

PWM frequency

308

324

340

Hz

minimum phase shift

22.5

o

minimum phase shift

0

o

maximum phase shift

(independent of configuration)

180

o

CSWP voltage resulting in

1V

Table 5:

to a capacitor, unless otherwise specified. All voltages are measured with respect to signal ground (pin 7); currents are

positive when flowing into the IC.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit