AM2182

Motor Driver IC

A

s

M

1

- 9 -

The lower via pad area, slightly larger than the IC pad itself, is exposed with a window in the

solder resist on the bottom surface of the board. It is not coated with solder during the board

construction to maintain a flat surface. In production, this can be accomplished with a peeled

solder mask.

We suggest the dimension of via should be ψ0.34mm in order to let solder be filled in via to

optimize the heat transfer to the PCB.

The number of via should be as much as possible to cover whole pad area in order to

optimize the heat transfer to the PCB.

1) The built-in thermal shutdown circuit mutes the output current when the chip temperature reaches

175℃ (typ.). The hysteresis is set to 25℃ (typ.), so the circuit will start up again when the chip

temperature falling to 150℃ (typ.).

2) Insert the bypass capacitor (~ 0.1uF ) between Vcc pin and GND pin as close as possible.

3) Motor output driver logic input:

FWD (pin17)

REV (pin18)

VO+ (pin5)

VO- (pin3)

Function

L

L

OPEN

OPEN

Open mode

L

H

L

H

Reverse mode

H

L

H

L

Forward mode

H

H

L

L

Brake mode

Input circuit of pin17 and pin18 is designed to avoid simultaneous activation of upper and

lower output tr. ; however, in order to improve reliability, apply motor forward/reverse input

once through open mode.

We recommend time period for open longer than 10msec.

“H” side Output voltage on output voltage (VO+, VO-) varies depending on output control

terminal for Motor output (pin19). “H” side output voltage is set three times (9.2dB Typ.)

SET(pin19). And, “L” side output voltage is equal to output saturation voltage.

This Vom compensation function allows low Vom ( for example: 4.7V) setting

to have superior noise-less performance with different type motors application.

The Vom won’t be dropped seriously when output CH is blocked by external force.