Features: Single supply operation
Very small outline package
Low RDS(ON) outputs
Sleep function
Internal UVLO
Crossover current protection
Thermal shutdown protectionPinout
SpecificationsLoad Supply Voltage
VBB.............................................................................36 V
VBB (Peak < 2 s) ......................................................38 V
Output Current, IOUT (Repetitive)1 ........................±2.8 A
Sense Voltage, VSENSE .............................................0.5 V
Logic Input Voltage, VIN ...............................0.3 V to 7 V
Package Power Dissipation, PD
A3949SLB2 .......................................................... 52ºC / W
A3949SLP3........................................................... 34ºC / W
Operating Temperature Range
Ambient Temperature, TA........................20°C to +85°C
Junction Temperature, TJ............................... +150°C Max.
Storage Temperature, TS .....................55°C to +150°CDescriptionDesigned for PWM (pulse width modulated) control of dc motors, the A3949 is capable of peak output currents to ±2.8 A and operating voltages to 36 V.
PHASE and ENABLE 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 reduce power dissipation during PWM operation.
Internal circuit protection includes thermal shutdown with hysteresis, undervoltage monitoring of VBB and VCP, and crossover current protection.
The A3949 is supplied in a choice of two power packages, a 16-pin plastic SOIC with a copper batwing tab (part number suffix LB), and a low profile (1.1mm) 16-pin TSSOP (suffix LP) with exposed power tab. Both packages are lead (Pb) free, with 100% matte tin leadframes.
Also see: A3950 DMOS Full-Bridge Motor Driver.
A3949 Data Sheet
