AM2168

Motor Driver ICs

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s

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Dual Full-Bridge PWM Motor Driver

AM2168

To drive both windings of a bipolar stepper motor or to bi-directionally control two DC motors, AM2168 motor

driver is designed for. Both bridges are capable of sustaining 36V and include internal pulse-width modulation

(PWM) control of the output current to 550mA. Optimization is done at the outputs for low output saturation

voltage drop (less than 1.8V total source plus sink at 500mA).

For PWM current control, the maximum output current is determined by the user’s selection of a reference voltage

and sensing resistor. Two logic-level inputs select output current limits of 0, 33%, 67%, or 100% of the maximum

level. A PHASE input to each bridge determines load current direction.

The bridges include both ground clamp and fly-back diodes for protection against inductive transients. Internally

generated delays prevent cross-over currents when switching current direction. Special power-up sequencing is not

required. A thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits.

The AM2168 is supplied in a 24-lead surface-mountable SOIC. Its batwing construction provides for maximum

package power dissipation in the smallest possible construction. Also, Pb free product is available ( Please refer to

Marking Identification ).

Applications

Scanner, MFP, Printer

Features

1) 550mA continuous output current

2) 36V output sustaining voltage

3) Internal clamp diodes

4) Internal PWM current control

5) Low output saturation voltage

6) Internal thermal shutdown circuitry

Parameter

Symbol

Limits

Unit

Motor supply voltage

36

V

Peak

+750

mA

Output current

Continuous

+550

mA

Logic supply voltage

7.0

V

Logic input voltage range

-0.3 ~ +7.0

V

Output emitter voltage

1.5

V

Operating temperature range

-20 ~ +85

℃

Storage temperature range

-55 ~ +150

℃

*Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of

conditions, do not exceed the specified peak current rating or a junction temperature of +150℃.