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AA51880

SERVO MOTOR CONTROLLER

Agamem Microelectronic Inc. 

PRELIMINARY

AA51880 Agamem Microelectronics Inc.

SERVO MOTOR CONTROLLER

PWM drive techniques provide the benefits of reduced power dissipation, improved servo

motor performance and positively affect system efficiency.

(7) Output driver

The output driver controls the servo current direction. For light load application, the servo can

be connected with OUT1 and OUT2 pin only. For heavy load application, the EXP1 and EXP2

pin will be connected to the base of the external PNP transistor. It drives in an H-bridge

configuration (The sink NPN drivers are built inside the chip).

■ TYPICAL APPLICATION EXAMPLE

A. Mini-Servo Application (No external drivers needed)

VCC

10

EXP1 2

VIN 14

OUT1 3

OUT2 5

C8 103pF

VR1

5KΩ

EXP2 6

VREG 9

RT

CT

POT RDB CST GND GND GND

1

16

15

11

7 4 12 13

R2

20KΩ

C3

0.1uF

C1

0.1uF

C2

0.1uF

R3

1KΩ

R4 150KΩ

C4

0.22uF

C5

4.7uF

R1

470KΩ

R7

1KΩ

©Copyright Agamem Microelectronics Inc.

5

www.agamem.com.tw 2008/4/22

AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE

TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER

DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

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