AS5979
Maximum 4.0A Full Bridge DC Motor
Driver with PWM Control
The AS5979 device is a brushed-DC motor driver
for printers, appliances, industrial equipment, and other
small machines. Two logic inputs control the H-bridge
driver, which consists of four N-channel MOSFETs that
can control motors bidirectionally with up to 4.0A peak
current. The inputs can be pulse width modulated
(PWM) to control motor speed, using a choice of
current-decay modes. Setting both inputs low enters a
low-power sleep mode. Input terminals are provided for
use in controlling the speed and direction of a DC
motor with externally applied PWM control signals.
Internal synchronous rectification control circuitry is
provided to lower power dissipation during PWM
operation.
Features
Monolithic IC Using BiCD Process
Input Voltage Range : 6.5V to 30V
Total Driver H+L Rdson Typical: 0.5Ω
Maximum 4.0A Current Drive
Adjustable PWM Current Limit
H-Bridge Motro Driver:
- Drives One DC Motor, One Winding of A
Stepper Motor, or Other Loads
PWM Control Interface
Integrated Current Regulation
Low Power Sleep Mode
Supporting 4 Operation Modes: Forward
/Reverse/Brake/Stop (OFF)
Sensorless Proprietary Back Electromotive
Force (BEMF) Control Scheme
Integrated Protection Features:
Over Current Protection (OCP)
Crossover Current Protection
VM Under voltage Lockout (UVLO)
Thermal Shut down (TSD)
Automatic Fault Recovery (AFR)
Integrated Protection Features: (VM≤28V)
Motor Short Protection (SCP)
Motor Lead Short to Ground Protection
Motor Lead Short to Battery Protection
Synchronous Rectification
Small Solution Size
Less than 1uA Shutdown Current
RoHS and Green Compliant
ePAD 8-pin, SOP Packages
-40℃ to +125 ℃ Temperature Range
Applications
Home Appliance Cooling Fan
Printers / Relay Drivers
Solenoid Drivers
Industrial Equipment
Other Mecha-tronic Applications
Instrumentation Fan
DC Brush Motor Drive
