Motor Driver. A3903 Datasheet

A3903 Driver. Datasheet pdf. Equivalent

Part A3903
Description Low Voltage DC Motor Driver
Feature A3903 Low Voltage DC Motor Driver Features and Benefits ▪ Constant voltage operation (adjustable) ▪.
Manufacture Allegro Micro Systems
Datasheet
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A3903 Low Voltage DC Motor Driver Features and Benefits ▪ C A3903 Datasheet
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A3903
A3903
Low Voltage DC Motor Driver
Features and Benefits
Constant voltage operation (adjustable)
500 mA output peak rating
Low power standby mode
Small 2 mm × 2 mm, 0.55 mm nominal height DFN
package
Typical input voltage range of 3 to 5.5 V
Adjustable constant voltage or PWM operation
Less than 500 nA standby mode current
–40 to 85 operating temperature range
Package: 8 Contact DFN (suffix EE)
Approximate Scale 1:1
Description
The A3903 is a low voltage bidirectional DC motor driver with
a typical input voltage range of 3 to 5.5 V and output currents up
to 500 mA. The unique output full-bridge incorporates source-
side linear operation to allow a constant voltage across the motor
coil. This regulated output minimizes motor voltage change due
to I × RDS(on) variation and battery voltage tolerance.
Logic input pins are provided to control the motor direction of
rotation, brake, and standby (< 500 nAsupply current) modes and
to allow optional PWM of the sink drivers. Internal protection
circuitry includes thermal shutdown, undervoltage lockout, and
crossover current (shoot-through) protection.
The A3903 is supplied in a 2 mm x 2 mm, 0.55 mm nominal
height, 8-lead DFN package, with exposed thermal pad (package
suffix EE). This small footprint package is lead (Pb) free, with
100% matte tin leadframe plating.
Applications include:
Robotic actuators and pumps
Portable printers/scanners
Camera lens/shutter control
Battery powered toys and games
Low noise test instrumentation systems
Typical Application
+VBAT
CPU
VDD
IN1
IN2
VREF
A3903
OUTA
OUTB
VSET
GND
M
3903-DS, Rev. 2



A3903
A3903
Low Voltage DC Motor Driver
Selection Guide
Part Number
A3903EEETR-T
Packing
Tape and reel, 3000 pieces/reel
Parameter
Supply Voltage
Logic Input Voltage Range
Output Current
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Absolute Maximum Ratings
Symbol
VDD
VIN
IOUT
TJ
Tstg
TA
Range E
Conditions
Min. Typ. Max. Units
––6V
–0.3 – 6 V
500 mA
– – 150 °C
–40 – 150 °C
–40 – 85 °C
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2





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