CA3224E(1996) Просмотр технического описания (PDF) - Intersil

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Компоненты Описание

производитель

CA3224E
(Rev.:1996)

Automatic Picture Tube Bias Control Circuit

Intersil 

CA3224E

+230V

12K

2.2K

R

G

TO R

R

DRIVER

CHROMA/

LUMA

2.7K

CIRCUIT G

BIAS

5K

B

20K

TO B

DRIVER

9.1K

-24V

PROGRAM

RGB TO

BLACK LEVEL

+12V

RFB

160K

2.7K

B

Q1

CATH

SG

DRIVE

RIN

RS

560Ω

1% SUMMING POINT

200Ω VS

0.12

C1

Q2

BIAS

R2

62K

1%

BIN

TO RCH

D1

R1

39K

TO BCH

1%

0.047

CC

GIN

0.047

0.047

+10V

AUTO-BIAS PULSE

+

33µF

3.9K

1.5K

+10V

10K

+ 10µF

Q3

1

21

2

20

ROUT

GRID PULSE

AMPLIFIER

INVERTER

3

19

4

18

5

17

CA224E

6

16

7

15

+ 10µF

C2

GOUT GIN

+ 10µF

+ BOUT

47µF

20K

12

14

22

10

9

8

13

11

AUTO BIAS

LEVEL ADJUST

HORIZONTAL

INPUT

VERTICAL

INPUT

NOTE:

3. One of three identical driver circuits shown.

FIGURE 4. TYPICAL APPLICATION CIRCUIT

ICATHODE

(mA)

A

B

0

SET-UP

SENSE

VCATHODE GRID (V)

FIGURE 5. PICTURE TUBE V-I CURVE

Electrostatic Protection (Note)

When correctly designed for ESD protection, SCRs can be

highly effective, enabling circuits to be protected to well in

excess of 4kV. The SCR ESD-EOS protection structures used

on each terminal of the CA3224E are shown schematically in

either Figures 6A or 6B. Although ESD-EOS protection is

included in the CA3224E, proper circuit board layout and

grounding techniques should be observed.

NOTE: For further information on CA3224E protection structures refer

to: AN7304, “Using SCRs as Transient Protection Structures in

Integrated Circuits”, by L.R. Avery. Intersil AnswerFAX (407-724-7800)

document #97304.

TO ACTIVE

CIRCUIT

RSENSE

TO ACTIVE

CIRCUIT

RHOLD

SUBSTRATE

POSITIVE

NEG. TRANSIENT TRANSIENT

PROTECT (A) PROTECT

FIGURE 6A.

RHOLD

NEGATIVE

POSITIVE

TRANSIENT TRANSIENT

PROTECT (B) PROTECT

FIGURE 6. TRANSIENT PROTECTION

FIGURE 6B.

8-60

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