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3953 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. 3953
Description  FULL-BRIDGE PWM MOTOR DRIVER
Download  15 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3953 Datasheet(HTML) 4 Page - Allegro MicroSystems

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3953
FULL-BRIDGE
PWM MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
4
PWM RC Fixed Off-time
tOFF RC
CT = 680 pF, RT= 30 k
Ω, VCC = 3.3 V
18.3
20.4
22.5
µs
PWM Turn-Off Time
tPWM(OFF)
Comparator Trip to Source Off,
1.0
1.5
µs
IOUT = 25 mA
Comparator Trip to Source Off,
1.8
2.6
µs
IOUT = 1.3 A
PWM Turn-On Time
tPWM(ON)
IRC Charge On to Source On,
0.4
0.7
µs
IOUT = 25 mA
IRC Charge On to Source On,
0.55
0.85
µs
IOUT = 1.3 A
PWM Minimum On Time
tON(min)
VCC = 3.3 V, RT
≥ 12 kΩ, CT = 680 pF
0.8
1.4
1.9
µs
VCC = 5.0 V, RT
≥ 12 kΩ, CT = 470 pF
0.8
1.6
2.0
µs
Propagation Delay Times
tpd
IOUT =
±1.3 A, 50% to 90%:
ENABLE On to Source On
1.0
µs
ENABLE Off to Source Off
1.0
µs
ENABLE On to Sink On
1.0
µs
ENABLE Off to Sink Off (MODE = L)
0.8
µs
PHASE Change to Sink On
2.4
µs
PHASE Change to Sink Off
0.8
µs
PHASE Change to Source On
2.0
µs
PHASE Change to Source Off
1.7
µs
Crossover Dead Time
tCODT
1 k
Ω Load to 25 V, VBB = 50 V
0.3
1.5
3.0
µs
Maximum PWM Frequency
fPWM(max)
IOUT = 1.3 A
70
——
kHz
ELECTRICAL CHARACTERISTICS at TJ = 25˚C, VBB = 5 V to 50 V, VCC = 3.0 V to 5.5 V
(unless otherwise noted.)
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
AC Timing
Continued next page…


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