SA53

SA53U

5

P r o d u c t I n n o v a t i o n F r o m

FIgURE3.ExTERNALCONNECTIONS

53

54

55

56

57

58

59

60

61

62

63

64

32

31

30

29

28

27

26

25

24

23

22

21

OUT 2

NC

PGND 2

PGND 2

PGND 2

HS

HS

NC

2b

NC

2t

NC

NC

V

V

V

NC

HS

HS

TEMP

NC

DIS2

NC

I1

TABLE.PINDESCRIPTIONS

Pin#

PinName

SignalType

Simplified Pin Description

29,30,31

V

Power

High Voltage Supply (8.5-60V) supplies phase 1 only

51,52,53

OUT 2

Power Output

Half Bridge 2 Power Output

55,56,57

PGND (phase 2)

Power

High Current GND Return Path for Power Output 2

3

SC

Logic Output

Indication of a short of an output to supply, GND or another phase

61

2b

Logic Input

Logic high commands 2 phase lower FET to turn on

63

2t

Logic Input

Logic high commands 2 phase upper FET to turn on

1

I2

Analog Output

Phase 2 current sense output

7

I

Logic Input/Output

As an output, logic high indicates cycle-by-cycle current limit, and

logic low indicates normal operation. As an input, logic high places

all outputs in a high impedance state and logic low disables the

cycle-by-cycle current limit function.