Revision 1.6

4 - 20

AS3834

Datasheet - P i n A s s i g n m e n t s ( To p V i e w )

4.1 Pin Descriptions

A_I/O...Analog pin, P...Power pin, DO...digital output, DO_OD...digital output open drain, DI...digital input,

DI_PU...digital input with pullup resistor, DI_PD...digital input with pull down resistor

Table 1. Pin Descriptions

Pin

Number

AS3834

TQFP-32

Pin

Number

AS3834

SOIC-28

Pin Name

Pin Type

Description

29

1

VSS

P

Analog Ground

30

2

B4

A_I/O

Base 4. Connect to base of external transistor.

31

3

E4

A_I/O

Emitter 4. Connect to emitter of external transistor.

1

4

xFAULT

DO_OD

Fault output. Active low.

2

5

ISET

A_I/O

Current setting. Connect current setting resistor.

3

6

UVLO

A_I/O

Undervoltage lockout input.

4

7

COMP

A_I/O

Compensation network. Connect compensation network.

5

8

SENSE

A_I/O

Current sense input. Provide a short, direct PCB path between

this pin and the positive side of the current sense resistor.

6

9

FB

A_I/O

Output voltage feedback input. Input for voltage divider.

Connect voltage divider output as short as possible to this pin

7

10

VDDL

A_I/O

Voltage regulator output 3.3V. Connect 2.2µ F decoupling capacitor to GND

8

11

GATE

A_I/O

Gate driver output.

10

12

PGND

P

Power Ground

11

13

VDDM

P

Voltage regulator output. Connect 2.2µ F decoupling capacitor to GND

12

14

VDDH

P

Supply voltage. Connect 1µ F decoupling capacitor to GND

14

15

VDDH_HC

P

Voltage regulator Input. Connect 2.2µ F decoupling capacitor to GND

15

16

VTH

A_I/O

Reference input for overtemperature detection.

16

17

PWM1

DI_PD

PWM input 1. PWM input for channel 1

17

19

PWM2

DI_PD

PWM input 2. PWM input for channel 2

18

20

PWM3

DI_PD

PWM input 3. PWM input for channel 3

19

21

PWM4

DI_PD

PWM input 4. PWM input for channel 4

21

22

VSS

P

Analog Ground

22

23

E2

A_I/O

Emitter 2. Connect to emitter of external transistor.

23

24

B2

A_I/O

Base 2. Connect to base of external transistor.

24

25

B1

A_I/O

Base 1. Connect to base of external transistor.

25

26

E1

A_I/O

Emitter 1. Connect to emitter of external transistor.

26

27

E3

A_I/O

Emitter 3. Connect to emitter of external transistor.

27

28

B3

A_I/O

Base 3. Connect to base of external transistor.