AM8068

Motor Driver ICs

OUT_B

GND

OUT_A

VCC

IN_B

IN_A

IN_A

IN_B

C4

10

μF~220μF

C2

0.1

μF

C1

1

2

3

6

5

4

C3

0.1

μF

M

0.1

μF

The function descriptions of capacitors on the application circuit:

C1、C2: Power supply VCC pin capacitor:

1)

The capacitor can reduce the power spike when the motor is in motion. To avoid the IC directly

damaged by the VCC peak voltage. It also can stabilize the power supply voltage and reduce its

ripples.

2)

The C1 capacitor can compensate power when motor starts running.

3)

The capacitor value (μF) determines the stability of the VCC during motor in motion. In general,

10

μF capacitor is enough in low voltage power (VCC). If the large voltage power or a heavy loading

motor is used, then a larger capacitor would be needed.

4)

On the PCB configuration, the C1、C2 must be mounted as close as possible to VCC pin (PIN4).

C3: The across-output capacitor ;

C4: The across-motor capacitor

1)

The capacitors can reduce the power spike of motor when operating. Therefore, a 0.

1μF capacitor is

recommended.

2)

On the PCB configuration, the C3 must be mounted as close as possible to OUT_A&B (PIN 1&PIN

3)

3)

The C4 capacitor single-ended can be welded on the motor shell.

4)

The C3、C4 capacitor must be added to the general application.

AMtek semiconductors

May. 2018 V1.1

- 6 -