Serial Interface.
The A3958 is controlled via a 3-wire (clock, data, strobe) serial port.
The programmable functions allow maximum flexibility in configuring the PWM to the motor drive requirements.
The serial data is clocked in starting with D19.
Bit D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D1
3958 A3958SLB CP CP2 CP1 PHASE OSC GROUND GROUND LOGIC SUPPLY ENABLE DATA CLOCK STROBE CHARGE PUMP DMOS FULL-BRIDGE PWM MOTOR DRIVER Designed for pulse-width modulated (PWM) current control of dc motors, the A3958SB and A3958SLB are capable of continuous output currents to ±2 A and operating voltages to 50 V.
Internal fixed offtime PWM current-control timing circuitry can be programmed via a serial interface to operate in slow, fast, and mixed current-decay modes.
PHASE and ENABLE input termina
A3958 Features
* I I I I I I I ±2 A, 50 V Continuous Output Rating Low rDS(on) Outputs (270 mΩ, Typical) Programmable Mixed, Fast, and Slow Current-Decay Modes Serial Interface Controls Chip Functions Synchronous Rectification for Low Power Dissipation Internal UVLO and Thermal-Shutdown Circuitry Crossover-Current P
Datasheet Details
A3958
Allegro MicroSystems
405.40 KB
Dmos full-bridge pwm motor driver.
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