Samsung KA2139 Datasheet

KA2139 VIDEO AMPLIFIER FOR MONITOR

28-DIP-600A

ORDERING INFORMATION

3 CHANNEL R.G.B VIDEO AMPLIFIER

The KA2l39 is a monolithic integrated circuit for processing
the R,G,B video in high resolution CRT display.
It contains 3 channel video amplifier, black level clamp
comparator for brightness control and DC control attenuator
for contrast control, this device is suitable for monitor.

FUNCTIONS

• R. G. B amplifier

• Contrast control

• Clamp & brIghtness circuit

• Vref. circuit

FEATURES

• 3 Channel R.G.B video amplifier (f.

• Superior linearity contrast control

• Black level clamp comparator for

brightness control

• Built-in clamp gate circuit to operate the
clamp comparator at black level

• Vref 2.4V bandgap circuit

=7OMHz:Typ)

-3DB

Device Package Operating Temperature

KA2139 28 DIP

-20°C ~ +70°C

BLOCK DIAGRAM

28 27 26

2

1

24 23 22 21 20 19 18 17 16 15

25

A2 A2

gm

A1

+ -

RED

3 4 5 6 7 8 9 10 11 12 13 14

GREEN

gm

A1

+ - + -

BLUE

A1

A2

gm

CONTRAST
CONTROL

Vref

2.4V

1.4
V

KA2139 VIDEO AMPLIFIER FOR MONITOR

PIN DESCRIPTION

No Symbol Description No Symbol Description

1 V

CC1

2 CONCAP1 Contrast capacitor 1 16 BOUT B channel output
3 CONCAP2 Contrast capacitor 2 17 BCLAMP(-) B-CH clamp feedback
4 RIN R channel input 18 BDREVE B-CH drive output
5 RCAP R-CH comparator cap. 19 GCLAMP(+) G brightness control
6 GIN G channel input 20 GOUT G channel output
7 GND Ground 21 GCLAMP(-) G-CH clamp feedback
8 GCAP G-CH comparator cap. 22 GDRIVE G-CH drive output

9 BIN B channel input 23 V
10 BCAP B-CH comparator cap. 24 RCLAMP(+) R brightness control
11 V

REF

12 CON Contrast control 26 RCLAMP(-) R-CH clamp feedback
13 V

CC1

14 GATEIN Clamp gate input 28 V

Power supply 1 15 BCLAMP(+) B brightness control

CC2

Power supply 2

R,G,B amp. offset voltage 25 ROUT R channel output

Power supply 1 27 RDRIVE R-CH drive output

CC1

Power supply 1

ABSOLUTE MAXIMUM RATINGS (TA = 25°C)

Characteristics Symbol Value Unit

Maximum Supply Voltage
Maximum Supply Current
Operating Voltage
Maximum Power Dissipation
Storage Temperature
Operating Temperature

VCCmax

lCCmax
VCCopr
PDmax

T

STG

T

OPR

13.5

105.0

10.8~13.2

2.5

- 55~+150

- 20~ + 70

V

mA

V
w

°C
°C