3948
FEATURES s s s s s s s ±1.5 A, 50 V Continuous Output Rating Low r DS(on) Outputs 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 Protection
Always order by plete part number:
Part Number A3948SB A3948SLB Package 24-pin batwing DIP 24-lead batwing SOIC RθJA 40°C/W 77°C/W RθJT 6°C/W 6°C/W
3948 DMOS FULL-BRIDGE PWM MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
VDD LOGIC SUPPLY
CHARGE PUMP BANDGAP VDD CREG TSD
+
CP1 CP2
LOAD SUPPLY BANDGAP REGULATOR VREG
UNDERVOLTAGE & FAULT DETECT
CHARGE PUMP
CONTROL LOGIC OUTA
PHASE ENABLE SYNC RECT MODE SYNC RECT DISABLE PWM MODE INT PWM MODE EXT
MODE PHASE ENABLE
GATE DRIVE
OUTB SENSE
ZERO CURRENT DETECT
CS RS
FIXED OFF PROGRAMMABLE BLANK DECAY PWM TIMER
CLOCK DATA STROBE RANGE
SERIAL PORT
SLEEP MODE
CURRENT SENSE
RANGE
REFERENCE BUFFER & DIVIDER
VREF
Dwg....
