UBA2070 Просмотр технического описания (PDF) - Philips Electronics

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UBA2070

600 V CCFL ballast driver IC

Philips Electronics 

Philips Semiconductors

600 V CCFL ballast driver IC

Product specification

UBA2070

SYMBOL

PARAMETER

CONDITION

MIN. TYP. MAX. UNIT

Lamp voltage sensor (pin LVS)

Ii

VLVS(fail)

VLVS(fail)(hys)

∆VLVS(fail)(hys)/∆T

VLVS(max)

Io(sink)

Io(source)(ign)

input current

fail voltage

fail voltage hysteresis

temperature coefficient hysteresis

maximum voltage

output sink current

ignition output source current

VLVS = 1.25 V

VCSW = 2 V

VCSW = 2 V

−

−

1.19 1.25

112 140

−

0.65

1.67 1.76

2.8 3.2

9.0 10

1

µA

1.31 V

168 mV

−

mV/K

1.85 V

3.6 µA

11 µA

Average current sensor (pins CS+ and CS−)

Ii

Voffset

Io(source)

Io(sink)

gm

input current

offset voltage

output source current

output sink current

transconductance

VCS = 0 V

VCS = 0 to 2.5 V

VCSW = 2.0 V

VCSW = 2.0 V

f = 1 kHz

−

−

−2 0

9.0 10

9.0 10

100 200

1

µA

+2 mV

11 µA

11 µA

400 µA/mV

Ignition timer (pin CT)

Io

output current

VCT = 2.5 V

VOL

LOW-level output voltage

VOH

HIGH-level output voltage

Vhys

output hysteresis

tign

ignition time

5.5 5.9

6.3 µA

−

1.4

−

V

−

3.6

−

V

2.05 2.20 2.35 V

−

0.257 −

s

Note

1. The maximum non-overlap time is determined by the level of the CF signal. If this signal exceeds a level of 1.25 V

the non-overlap will end. This equals a maximum non-overlap time of 6.7 µs at a bridge frequency of 40 kHz.

2002 Oct 24

12

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