PIN FUNCTIONS

PDIP &

SO

Name

Function

1;2

OUTPUT A

See pins 5;21

3;23

SENSE RESISTOR

Connection to Lower Emitters of Output Stage for Insertion of Current Sense Resistor

4;22

COMPARATOR

INPUT

Input connected to the comparators. The voltage across the sense resistor is

feedback to this input throught the low pass filter RC CC. The higher power transistors

are disabled when the sense voltage exceeds the reference voltage of the selected

5;21

OUTPUT B

Output Connection. The output stage is a "H" bridge formed by four transistors and

four diodes suitable for switching applications.

6;19

GROUND

See pins 7;18

7;18

GROUND

Ground Connection. With pins 6 and 19 also conducts heat from die to printed circuit

copper.

8;20

INPUT 0

See INPUT 1 (pins 9;17)

9;17

INPUT 1

These pins and pins 8;20 (INPUT 0) are logic inputs which select the outputs of the

comparators to set the current level. Current also depends on the sensing resistor and

reference voltage. See Funcional Description.

10;16

PHASE

This TTL-compatible logic inputs sets the direction of current flow through the load. A

high level causes current to flow from OUTPUT A (source) to OUTPUT B (sink). A

schmitt trigger on this input provides good noise immunity and a delay circuit prevents

output stage short circuits during switching.

11;15

REFERENCE

VOLTAGE

A voltage applied to this pin sets the reference voltage of the comparators, this

0 and INPUT 1).

12;14

RC

A parallel RC network connected to this pin sets the OFF time of the higher power

transistors. The pulse generator is a monostable triggered by the output of the

13

24

Vs - LOAD SUPPLY Supply Voltage Input for the Output Stages.

Ω, 100pF).

PIN CONNECTION (Top view)

Powerdip and SO

L6219

2/9