A3955SB-T Allegro Microsystems Inc, A3955SB-T Datasheet - Page 7

• Manufacturer Part Number: A3955SB-T
• Description: IC MOTOR DRIVER PWM FULL 16-DIP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3955SB-T

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±1.5A
• Voltage - Load: 4.5 V ~ 50 V
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Motor Type: Full Bridge
• No. Of Outputs: 2
• Output Current: 1.5A
• Output Voltage: 50V
• Supply Voltage Range: 4.5V To 5.5V
• Driver Case Style: DIP
• No. Of Pins: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1067

A3955
Terminal
Note the A3955SB (DIP) and the A3955SLB
(SOIC) are electrically identical and share a
common terminal number assignment.
12-13
4-5
10
14
15
16
11
1
2
3
6
7
8
9
LOGIC SUPPLY (V
LOAD SUPPLY
GROUND
GROUND
PHASE
SENSE
Name
OUT
OUT
PFD
REF
RC
D
D
D
2
1
0
A
B
Description
(Percent Fast Decay) The analog input used to set the current-decay mode.
(V
D
The parallel combination of external resistor R
PWM current regulator. C
Return for the logic supply (V
measurements.
The PHASE input determines the direction of current in the load.
(DATA
(DATA
One-of-two output load connections.
Connection to the sink-transistor emitters. Sense resistor R
point and ground.
Return for the logic supply (V
measurements.
(DATA
One-of-two output load connections.
(V
Full-Bridge PWM Microstepping Motor Driver
0
REF
CC
BB
, D
) Supply voltage for the load.
) Supply voltage for the logic circuitry. Typically = 5 V.
) The voltage at this input (along with the value of R
1
, and D
2
1
0
) One-of-three (MSB) control bits for the internal digital-to-analog converter.
) One-of-three control bits for the internal digital-to-analog converter.
) One-of-three (LSB) control bits for the internal digital-to-analog converter.
2
) set the peak output current.
Terminal Functions
T
also sets the blanking time.
CC
CC
) and load supply (V
) and load supply (V
T
and capacitor C
BB
BB
); the reference for all voltage
); the reference for all voltage
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
S
and the states of DAC inputs
S
is connected between this
T
set the off time for the
6