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Motor Driver. A3903 Datasheet

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Motor Driver. A3903 Datasheet






A3903 Driver. Datasheet pdf. Equivalent




A3903 Driver. Datasheet pdf. Equivalent





Part

A3903

Description

Low Voltage DC Motor Driver



Feature


A3903 Low Voltage DC Motor Driver Featu res and Benefits ▪ Constant voltage o peration (adjustable) ▪ 500 mA output peak rating ▪ Low power standby mode ▪ Small 2 mm × 2 mm, 0.55 mm nomina l height DFN package ▪ Typical input voltage range of 3 to 5.5 V ▪ Adjusta ble constant voltage or PWM operation Less than 500 nA standby mode curren t ▪ –40 to 85 operating temperatu.
Manufacture

Allegro Micro Systems

Datasheet
Download A3903 Datasheet


Allegro Micro Systems A3903

A3903; re range Package: 8 Contact DFN (suffix EE) Approximate Scale 1:1 Description The A3903 is a low voltage bidirectiona l DC motor driver with a typical input voltage range of 3 to 5.5 V and output currents up to 500 mA. The unique outpu t full-bridge incorporates sourceside l inear operation to allow a constant vol tage across the motor coil. This regula ted output minimiz.


Allegro Micro Systems A3903

es motor voltage change due to I × RDS( on) variation and battery voltage toler ance. Logic input pins are provided to control the motor direction of rotation , brake, and standby (< 500 nAsupply cu rrent) modes and to allow optional PWM of the .


Allegro Micro Systems A3903

.

Part

A3903

Description

Low Voltage DC Motor Driver



Feature


A3903 Low Voltage DC Motor Driver Featu res and Benefits ▪ Constant voltage o peration (adjustable) ▪ 500 mA output peak rating ▪ Low power standby mode ▪ Small 2 mm × 2 mm, 0.55 mm nomina l height DFN package ▪ Typical input voltage range of 3 to 5.5 V ▪ Adjusta ble constant voltage or PWM operation Less than 500 nA standby mode curren t ▪ –40 to 85 operating temperatu.
Manufacture

Allegro Micro Systems

Datasheet
Download A3903 Datasheet




 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




 A3903
A3903
Low Voltage DC Motor Driver
Functional Block Diagram
VREF
VBG
CHARGE
R1 PUMP
VSET
R2
3R OUTA OUTB
R
VDD
VCP
3R
R
VSET
OUTA
3 to 5.5V
10 MF
Sink
Drive
IN1
Sink
Drive
OUTB
GND
IN2 Control Logic
Terminal Diagram
OUTB 1
GND 2
VDD 3
OUTA 4
8 IN2
7 IN1
6 VREF
5 VSET
(Top View)
Number
1
2
3
4
5
6
7
8
Name
OUTB
GND
VDD
OUTA
VSET
VREF
IN1
IN2
Description
Motor terminal
Ground
Input supply
Motor terminal
Select source-side output voltage
Bandgap reference
Control logic input
Control logic input
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3



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