3955
FEATURES s s s s s s s s ±1.5 A Continuous Output Current 50 V Output Voltage Rating Internal PWM Current Control 3-Bit Non-Linear DAC Fast, Mixed Fast/Slow, and Slow Current-Decay Modes Internal Transient-Suppression Diodes Internal Thermal-Shutdown Circuitry Crossover-Current and UVLO Protection
Always order by plete part number:
Part Number A3955SB A3955SLB Package 16-Pin DIP 16-Lead SOIC
3955 FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
LOGIC SUPPLY
PHASE 7
6 VCC
VBB GROUND 4 5 12 13
UVLO & TSD
MIXED-DECAY PARATOR
PWM LATCH
BLANKING GATE
CURRENT-SENSE PARATOR
LOAD SUPPLY
OUTA
OUTB
SENSE 11
+
- BLANKING
R Q S +
- RC 3 V TH 2
+
- ÷3 D/A
DISABLE
RS 8
D2
D1
D0
Dwg....
