A3906SESTR-T Allegro Microsystems Inc, A3906SESTR-T Datasheet

IC, MOTOR DRIVER, STEPPER, 1A, QFN-20

A3906SESTR-T

Manufacturer Part Number
A3906SESTR-T
Description
IC, MOTOR DRIVER, STEPPER, 1A, QFN-20
Manufacturer
Allegro Microsystems Inc
Datasheet

Specifications of A3906SESTR-T

No. Of Outputs
2
Output Current
1A
Output Voltage
9V
Driver Case Style
QFN
No. Of Pins
20
Operating Temperature Range
-20°C To +85°C
Package / Case
20-QFN
Applications
DC Motor Driver, Stepper Motor Driver
Number Of Outputs
2/1
Current - Output
± 1A
Voltage - Supply
2.5 V ~ 9 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Operating Temperature Classification
Commercial
Motor Controller Type
DC Motor Driver
Operating Supply Voltage (min)
2.5V
Operating Supply Voltage (max)
9V
Motor Type
Stepper
Supply Voltage Range
2.5V To 9V
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Load
-
Lead Free Status / Rohs Status
Compliant
Other names
620-1288-2
A3906SESTR-T

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
A3906SESTR-T
Manufacturer:
ST
Quantity:
21 000
Part Number:
A3906SESTR-T
Manufacturer:
ALLEGRO
Quantity:
8 000
Part Number:
A3906SESTR-T
Manufacturer:
ST
0
Part Number:
A3906SESTR-T
Manufacturer:
ALLEGRO/雅丽高
Quantity:
20 000
Features and Benefits
▪ 2.5 to 9 V operation
▪ Internal PWM current limit control
▪ Synchronous rectification for reduced power dissipation
▪ Peak current output flag
▪ Undervoltage lockout
▪ Low R
▪ Small package
▪ Brake mode for DC motors
▪ Sleep function
▪ Crossover-current protection
▪ Thermal shutdown
Package: 20-contact QFN (suffix ES)
3906-DS, Rev. 4
+5 V
DS(on)
Low Voltage Stepper and Single/Dual DC Motor Driver
outputs
SLEEP
IN1
IN2
IN3
IN4
FL1
FL2
Dual DC motor application
CP1
0.1 μF
CP2
A3906
GND
CP3
0.1 μF
CP4
SENSE1
SENSE2
OUT1A
OUT1B
OUT2A
OUT2B
Approximate size
VCP
VBB
M
M
Typical Applications
0.1 μF
10 μF
10 V
Description
Designed for pulse width modulated (PWM) control of low
voltage stepper motors, and single and dual DC motors, the
A3906 is capable of output currents up to 1 A per channel and
operating voltages from 2.5 to 9 V.
The A3906 has an internal fixed off-time PWM timer that
sets a peak current based on the selection of a current sense
resistor. An overcurrent output flag is provided that notifies
the user when the current in the motor winding reaches the
peak current determined by the sense resistor. The fault output
does not affect driver operation.
The A3906 is provided in a 20-contact, 4 mm × 4 mm, 0.75 mm
nominal overall height QFN, with exposed pad for enhanced
thermal dissipation. It is lead (Pb) free, with 100% matte tin
leadframe plating.
Applications include the following:
▪ Digital still cameras (DSC)
▪ Cell phone cameras
▪ USB powered devices
▪ Battery powered devices
+5 V
SLEEP
IN1
IN2
IN3
IN4
FL1
FL2
Stepper motor application
CP1
CP2
0.1 μF
A3906
GND
CP3
CP4
0.1 μF
SENSE1
SENSE2
OUT1A
OUT1B
OUT2A
OUT2B
VCP
VBB
A3906
0.1 μF
10 μF
10 V
M

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A3906SESTR-T Summary of contents

Page 1

Low Voltage Stepper and Single/Dual DC Motor Driver Features and Benefits ▪ 2 operation ▪ Internal PWM current limit control ▪ Synchronous rectification for reduced power dissipation ▪ Peak current output flag ▪ Undervoltage lockout ▪ Low ...

Page 2

... A3906 Low Voltage Stepper and Single/Dual DC Motor Driver Selection Guide Part Number A3906SESTR-T 1500 pieces per 7-in. reel Absolute Maximum Ratings Characteristic Symbol Load Supply Voltage V BB Logic Input Voltage Range V IN Sense Voltage V SENSEx Output Current I OUT Output Current in Paralleled ...

Page 3

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver 0.1 μF VBB 10 μ GND + SLEEP FL1 FL2 IN1 IN2 IN3 IN4 Functional Block Diagram 0.1 μF 0.1 μF Charge Pump Regulator Sense1 Sense2 ...

Page 4

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver ELECTRICAL CHARACTERISTICS Characteristics Operating Voltage Range VBB Supply Current Output Resistance Current Trip Sense Voltage Clamp Diode Voltage Output Leakage Current Control Logic Logic Input Voltage Logic Input Current Input Hysteresis ...

Page 5

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver I LOAD Fault Asserted FLx NOTE: Timer resets after each reset of the PWM latch. DC Motor Operation IN1 IN2 IN3 ...

Page 6

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver Device Operation The A3906 is a dual full-bridge low volt- age motor driver capable of operating one stepper motor, two DC motors, or one high current DC motor. MOSFET output stages ...

Page 7

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver External PWM If external PWM is used, the internal current control can either be disabled by shorting the SENSEx pin to ground can be used to limit the peak ...

Page 8

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver Parallel Operation The A3906 can be paralleled for applica- tions that require higher output currents. In paralleled mode the driver can source 2 A continuous. The A3906 has two completely independent ...

Page 9

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver becomes an ideal location for a star ground point. A low imped- ance ground will prevent ground bounce during high current operation and ensure that the supply voltage remains stable at ...

Page 10

A3906 Low Voltage Stepper and Single/Dual DC Motor Driver ES Package, 20-Contact QFN with Exposed Thermal Pad 4.00 ±0. 21X 0.08 C +0.05 0.25 –0.07 0.50 +0.15 0.40 –0. 2.45 Copyright ©2008-2010, ...

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