Serial Interface.
The A3972SB 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 written as two 19-bit words: 1 bit to select the word and 18 bits of data.
The
3972 CHARGE PUMP DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER VCP CP1 CP2 OUT1B LOAD SUPPLY1 GROUND GROUND SENSE1 OUT1A STROBE CLOCK DATA 1 2 3 4 5 6 7 8 9 9 10 11 12 24 23 22 21 20 19 18 17 16 OSC SLEEP VREG OUT2B LOAD SUPPLY2 GROUND GROUND SENSE2 OUT2A LOGIC SUPPLY MUX REF 6-BIT DAC & LOGIC 6-BIT DAC & LOGIC VBB1 VBB2 SERIAL PORT VDD 15 14 13 Dwg.
PP-069-3 ABSOLUTE MAXIMUM RATINGS at TA = +25°C Load Supply Voltage, VBB 50 V Output Current, IOUT ±1.5 A Logic Supply Voltage,
A3972 Features
* I ±1.5 A, 50 V Continuous Output Rating I Low rDS(on) DMOS Output Drivers I Optimized Microstepping via 6-Bit Linear DACs I Programmable Mixed, Fast, and Slow Current-Decay Modes I 4 MHz Internal Oscillator for Digital Timing I Serial-Interface Controls Chip Functions I Synchronous Rectification for
Datasheet Details
A3972
Allegro MicroSystems
295.85 KB
Dual dmos full-bridge microstepping pwm motor driver.
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