CA3228 データシートの表示（PDF） - Intersil

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CA3228

Speed Control System with Memory

Intersil 

CA3228

V3ON

ON

RESUME

SET/ACCEL

COAST

R3, 2.2K

R4,680

R5, 120

OFF

MOMENTARY

VCC

CONTACT

T.P.A.

1

24

DRIVER

COMMAND

SWITCHES

RI

0.1µF 2

23

560 10K

3

22

S1

0.68µF

R2

4

21

S2

10K

5

20

0.001µF 6

19

S3

7

18

S4

S5

8.2K

0.05µF

43K

0.047µF 8

17

9

16

N

S

T.P.B.

150K

2.2µF

10K

10

15

11

14

12

13

51K

SPEED INPUT

FREQUENCY, fS

2.22 Hz/MPH

BRAKE LIGHT

BRAKE SWITCH

S6

GATE

VAC

VENT

1M

SEE FIGURE 3

VCC

10K

10K

CEXT

2.2µF

2.4M

+

REXT

VCC

SWITCH

FUNCTION

S1 - ON

10K

VOLTAGE AT TERM. 3

RATIO TO VCC

MIN

MAX

1.12

-

ALL RESISTANCE VALUES ARE IN OHMS

VBRAKE

S2 - RESUME

S3 - ACCEL

0.725

0.482

0.8

0.599

S4 - COAST

0.148

0.272

S5 - OFF

0

0.094

IDLE (Note 1)

0.93

0.96

NOTE: 1. All Switches Open

FIGURE 2. TYPICAL AUTOMOTIVE SPEED CONTROL APPLICATION

0.22µF

+8.2V

1.2K 1.2K

VCC VAC

VOLT.

REG

+14.4V

VENT

SOLENOID

VENT

CA3228E

(SEE FIGURE 2)

GATE

4.7K

VACUUM

SOLENOID

620

0.5W

TO

AIR

N.O.

VENT

VALVE

TO VACUUM

SOURCE

N.C.

VAC

VALVE DIAPHRAGM

POSITON

FEED BACK

(OPTIONAL

TO PIN 20)

TO THROTTLE

SYSTEM MODE

VALVE

ACCEL

CRUISE

COAST

VAC

Open

NC (Note 1)

NC

VENT

Close

Close (Note 1)

NC

NOTE:

1. Open or Closed as Required to Maintain Set Speed Error

VAC (Pin 22)

VENT (Pin 21)

GATE (pin 23)

ACCEL

H

H

L

CRUISE

L

H

L

COAST

L

L

L

BRAKE

L

L

H

REDUNDANT BRAKE

L

L

H

HI-SPEED DROPOUT

L

L

H

LO-SPEED DROPOUT

L

L

H

FIGURE 3. SOLENOID DRIVERS AND SERVO VACUUM CONTROL MECHANISM TYPICAL APPLICATION

10-35

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