DB3264 Rev 3

7/24

L99UDL01

Block diagram and pin descriptions

22

1.2

Pin description

Table 2. Pin description

Pin #

Name

Description

1

VS1_2

Supply for half bridge 1

2

OUT1_1

Half bridge output 1

3

OUT1_2

Half bridge output 1

4

GND1_1

Ground for half bridge 1

5

GND1_2

Ground for half bridge 1

6

VS2_1

Supply for half bridge 2

7

VS2_2

Supply for half bridge 2

8

OUT2_1

Half bridge output 2

9

OUT2_2

Half bridge output 2

10

GND2_1

Ground for half bridge 2

11

GND2_2

Ground for half bridge 2

12

VS3_1

Supply for half bridge 3

13

VS3_2

Supply for half bridge 3

14

OUT3_1

Half bridge output 3

15

OUT3_2

Half bridge output 3

16

GND3_1

Ground for half bridge 3

17

GND3_2

Ground for half bridge 3

18

EN_OUT

Failsafe logic input. On its rising edge, EN_OUT activates outputs including External

MOSFET drivers. Low disables all actuations.

19

DOUT

Programmable I/O pin / Default as Global Fault Flag

20

GNDEXT1

Ground for VDS reference for low side MOSFET

21

GATEL1

Gate drive for low side external MOSFET

22

SRC1

Source – Drain node between high and low side MOSFETS. Used for VDS detection of

both high and low side MOSFETs

23

GATEH1

Gate drive for high side external MOSFET

24

DRN1

Drain connection for external H-Bridge, Sensing for VDS fault

25

GNDEXT2

Ground for VDS reference for low side MOSFET

26

GATEL2

Gate drive for low side external MOSFET

27

SRC2

Programmable I/O pin / Optional Source – Drain node between high and low side

auxiliary MOSFETS. Used for VDS detection of both high and low side MOSFETs

28

GATEH2

Programmable I/O pin / optional external gate drive for auxiliary high side MOSFET

29

DRN2

Drain connection for external H-Bridge, Sensing for VDS fault

30

GND

Ground pin

31

NC

Not Connected pin; to leave floating