Purchase A3949, In-stock A3949 From SeekIC.
Part Number: A3949
Description: Designed for PWM (pulse width modulated) control of dc motors, the A3949 is capable of peak output currents to ±2.8 ...
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A3949
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DataSheet
General Description
A3949 General Description
Designed 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 rectifi cation 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 suffi x LB), and a low profi le (1.1mm) 16-pin TSSOP (suffi x LP) with exposed power tab. Both packages are available in a lead-free version (100% matte tin leadframe).
A3949 Maximum Ratings
Load 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°C
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°C
A3949 Features
Single supply operation
Very small outline package
Low RDS(ON) outputs
Sleep function
Internal UVLO
Crossover current protection
Thermal shutdown protection
Very small outline package
Low RDS(ON) outputs
Sleep function
Internal UVLO
Crossover current protection
Thermal shutdown protection
A3949 Connection Diagram
A3949
PDF/DataSheet Download
- Datasheet: A3949
- File Size: 366538 KB
- Manufacturer: ALLEGRO [Allegro MicroSystems]
- Click here to Download
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