Description

Designed to control three-phase brushless DC motors, the

A4923iscapableofhigh-currentgatedriveforanallN-channel

power MOSFET 3-phase bridge.

Sinusoidal current control is employed via output PWM, to

minimize vibration, noise, and torque ripple.

Internal circuit protection includes thermal shutdown with

hysteresis, over-current, and dead-time protection. Special

power up sequencing is not required.

The A4923 is supplied in a 32 terminal 5×5×0.9mm QFN

package (suffix ET) with exposed pad for enhanced thermal

dissipation. This small footprint package is lead (Pb) free with

100% matte tin leadframe plating, and it is also available with

optional sidewall plating.

A4923-DS

Features and Benefits

• Sinusoidal Drive Current

• Hall Element Inputs

• PWM Current Limiting

• Dead-time Protection

• FGO (Tach) Output

• Internal UVLO

• Thermal Shutdown Circuitry

3-Phase Sinusoidal Motor Controller

Packages: 32-Pin QFN (suffix ET)

Typical Application Diagram

Not to scale

A4923

External

Control

FGO

Hall

HC+

HC-

Hall

HB+

HB-

Hall

HA+

HA-

STARTn

BRAKE

DIR

GND

TEST1

TEST2

BLDC Motor

Rsense

LSS

A4923

GLC

GLB

GLA

CP1

SC

SB

SA

CP2

GHC

GHB

GHA

Phase A

Phase B

Phase C

VCP

VBB

VBB

VREG7.2

VREG3.3