A4923 Datasheet, PDF (2/11 Pages) Allegro MicroSystems – 3-Phase Sinusoidal Motor Controller

A4923
3-Phase Sinusoidal Motor Controller
Features and Benefits
• Sinusoidal Drive Current
• Hall Element Inputs
• PWM Current Limiting
• Dead-time Protection
• FGO (Tach) Output
• Internal UVLO
• Thermal Shutdown Circuitry
Packages: 32-Pin QFN (suffix ET)
Description
Designed to control three-phase brushless DC motors, the
A4923 is capable of high-current gate drive for an all N-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.
Not to scale
Hall
Hall
Hall
External
Control
A4923-DS
VREG7.2 VREG3.3 VBB
VBB
HA+
HA-
HB+
HB-
HC+
HC-
FGO
STARTn
A4923
VCP
CP2
CP1
GHA
SA
GLA
GHB
SB
GLB
GHC
SC
GLC
BRAKE
LSS
Rsense
DIR
TEST1 TEST2
GND
Typical Application Diagram
Phase A
Phase B
Phase C
BLDC Motor