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