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TFB4014T

Pinning

Pin

Symbol

Function

1

Positive supply voltage

2

CPGR

Current limit, programmable by external resistor

3

C2

Control input switch 2, pull down

4

S2

Output status detection switch 2, pull up

5

L2

Feeding output switch 2

6

Negative supply voltage

7

Negative supply voltage

8

Negative supply voltage

9

Negative supply voltage

10

L3

Feeding output switch 3

11

S3

Output status detection switch 3, pull up

12

C3

Control input switch 3, pull down

13

n.c.

-

14

CS

Input chip select, pull up

15

RST

Reset input, pull up

16

n.c.

-

17

C4

Control input switch 4, pull down

18

S4

Output status detection switch 4, pull up

19

L4

Feeding output switch 4

20

Negative supply voltage

21

Negative supply voltage

22

Negative supply voltage

23

Negative supply voltage

24

L1

Feeding output switch 1

25

S1

Output status detection switch 1, pull up

26

C1

Control input switch 1, pull down

27

TP

Test pin, don’t connect

28

GND

Ground

Functional Description

four feeding output stages. Each output is able to deliver a nominal output current in the

range from 50mA to 150mA. The output current limit is programmable by an external resistor

connected to ground. The resistor value is calculated by:

The current limitation response time is about 100 millisecond. This delay avoids a failure de-

tection caused by current peaks when the line outputs turn-on. All outputs are protected

against overload and overtemperature.

The TFB4014T also contains a parallel logic interface to control each output stage sepa-

rately. The status outputs are open collector outputs with internal 15k

Ω pull-up resistors.