Always order by complete part number, e.g., A3940KLP .

FULL-BRIDGE POWER MOSFET CONTROLLER

— For Automotive Applications

3940

The A3940KLP and A3940KLW are designed specifically for

automotive applications that require high-power motors. Each provides

four high-current gate drive outputs capable of driving a wide range of

n-channel power MOSFETs in a full-bridge configuration.

Bootstrap capacitors are utilized to provide the above-battery

supply voltage required for n-channel FETs. An internal charge pump

for the high side allows for dc (100% duty cycle) operation of the

bridge.

Protection features include supply under/overvoltage, thermal

shutdown, and motor lead short-to-battery and short-to-ground fault

notification, and a programmable dead-time adjustment for cross-

conduction prevention.

The A3940 is supplied in a choice of two power packages, a 28-

lead TSSOP with an exposed thermal pad (suffix LP), and a 28-lead

wide-body SOIC (suffix LW).

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ABSOLUTE MAXIMUM RATINGS

Load Supply Voltage Range, VBB,

VDRAIN, CP1 .......... -0.6 V to +40 V

Output Voltage Ranges,

LSS .............................. -2 V to +6.5 V

GHA/GHB, V

SA/SB, V

GLA/GLB, V

CA/CB, V

CP2,VCP, VIN .......... -0.6 V to +52 V

Logic Input/Output Voltage Range

V

-0.3 V to +6.5 V

Operating Temperature Range,

T

-40°C to +135°C

Junction Temperature, T

Storage Temperature Range,

T

-55°C to +150°C

* Fault conditions that produce excessive

junction temperature will activate device

thermal shutdown circuitry. These conditions

can be tolerated, but should be avoided.

A3940KLP

(TSSOP with exposed

thermal pad)

A3940KLW

(SOIC)

Approx. 2X actual size.

4

3

2

1

8

5

12

11

10

9

21

22

23

24

17

20

15

16

27

28

14

13

19

18

25

26

6

7

4

3

2

1

8

5

12

11

10

9

21

22

23

24

17

20

15

16

27

28

14

13

19

18

25

26

6

7