A3957SLB Allegro, A3957SLB Datasheet - Page 6

• Manufacturer Part Number: A3957SLB
• Description: Full Bridge PWM Motor Driver 5V 24-Pin SOIC W
• Manufacturer: Allegro
• Type: Full Bridge PWM Motor Driverr

Specifications of A3957SLB

• Package: 24SOIC W
• Operating Supply Voltage: 5 V
• Maximum Operating Current: 4 mA
• Operating Temperature: -20 to 85 °C

ELECTRICAL CHARACTERISTICS at T
otherwise noted.)
AC Timing
3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
Characteristic
PWM RC Fixed Off-time
PWM Turn-Off Time
PWM Turn-On Time
PWM Minimum On Time
Crossover Dead Time
t
Symbol
t
PWM(OFF)
t
PWM(ON)
t
OFF RC
ON(min)
t
CODT
Test Conditions
C
Current-Sense Comparator Trip
Current-Sense Comparator Trip
I
I
V
1 k Load to 25 V
RC
RC
CC
T
to Source OFF, I
to Source OFF, I
I
I
I
A
= 470 pF, R
OUT
OUT
OUT
Charge ON to Source ON,
Charge ON to Source ON,
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
= 5.0 V, R
= 25˚C, V
= 100 mA
= 1.5 A
= 100 mA
T
T
BB
= 43 k
43 k , C
OUT
OUT
= 5 V to 50 V, V
= 100 mA
= 1.5 A
T
= 470 pF
CC
Min.
18.2
1.0
0.3
—
—
—
—
= 4.5 V to 5.5 V (unless
Typ.
20.2
0.55
1.0
1.4
0.4
1.6
1.5
Limits
Max.
22.3
0.85
1.5
2.5
0.7
2.2
3.0
Units
s
s
s
s
s
s
s