A3953 データシートの表示（PDF） - Allegro MicroSystems

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A3953

FULL-BRIDGE PWM MOTOR DRIVER

Allegro MicroSystems 

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…

115 Northeast Cutoff, Box 15036

4

Worcester, Massachusetts 01615-0036 (508) 853-5000

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