AM4961A

Document number: DS36626 Rev. 1 - 2

2 of 17

www.diodes.com

October 2013

© Diodes Incorporated

AM4961A

A Product Line of

Diodes Incorporated

Typical Applications Circuit

OUT2

OUT1

VCC

GND

VMIN

CT

VPWM

VREF

COSC

HIN-

FG

HB

RD

HIN+

Hall

AM4961A

D1

C1

1

µF or greater

R1

27k

R2

10k

R4

39k

R6 330k

R7

100k

R5

100k

PWM

VCC

L1

R3 7.5k

R8

68k

C2

0.33

µF

C3

100pF

C4

0.47

µF

1 (1)

2 (3)

3 (4)

4 (5)

5 (6)

6 (7)

7 (8)

8 (9)

9 (10)

10 (11)

11 (12)

12 (13)

13 (14)

14 (15)

PGND

(16)

Q1

Typical Application Circuit with an External Input PWM Speed Control Signal

Note:

4. C1 is for power stabilization and should be 1µF or higher depending on the motor current and motor design.

Pin Descriptions

Package: HTSSOP-14 and SSOP16

Pin Number

Pin Name

Function

HTSSOP-14

SSOP-16

1

1

OUT2

Drive output 2

–

2

NC

No connection

2

3

VCC

Power supply

3

4

VMIN

Minimum duty setting

4

5

VPWM

Adjustable input

5

6

COSC

Oscillator capacitor

6

7

FG

Rotation speed indicator

7

8

RD

Rotation/lock state indicator

8

9

HIN+

Hall sensor input+

9

10

HB

Hall sensor bias regulator

10

11

HIN-

Hall sensor input-

11

12

VREF

Reference voltage regulator

12

13

CT

Lock and rotation setting capacitor terminal

13

14

GND

Ground for control circuit

14

15

OUT1

Drive output 1

–

16

PGND

Power ground