CA3224E Просмотр технического описания (PDF) - Intersil

Номер в каталоге

Компоненты Описание

производитель

CA3224E

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%

AUTO-BIAS PULSE

0.047

CC

GIN

0.047

0.047

+10V

+

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 re-

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

tegrated Circuits”, by L.R. Avery.

TO ACTIVE

CIRCUIT

RSENSE

TO ACTIVE

CIRCUIT

RHOLD

SUBSTRATE

POSITIVE

NEG. TRANSIENT TRANSIENT

PROTECT (A) PROTECT

FIGURE 6A.

5

RHOLD

NEGATIVE

POSITIVE

TRANSIENT TRANSIENT

PROTECT (B) PROTECT

FIGURE 6. TRANSIENT PROTECTION

FIGURE 6B.

Share Link: