A3951SW 查看數據表（PDF） - Allegro MicroSystems

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A3951SW

FULL-BRIDGE PWM MOTOR DRIVER

Allegro MicroSystems 

3951

FULL-BRIDGE

PWM MOTOR DRIVER

ELECTRICAL CHARACTERISTICS (Continued)

Characteristic

Symbol Test Conditions

Control Logic

Logic Supply Voltage Range

Logic Input Voltage

Logic Input Current

Reference Voltage Range

Reference Input Current

Reference Voltage Divider Ratio

PWM RC Fixed Off Time

PWM Minimum On Time

Propagation Delay Time

VCC

VIN(1)

VIN(0)

IIN(1)

IIN(0)

VREF

IREF

–

toff

ton(min)

tpd

Operating

VIN = 2.0 V

VIN = 0.8 V

Operating

2.0 V ≤ VREF ≤ VCC

VREF = 5 V

CT = 1000 pF, RT = 20 kΩ

CT = 820 pF, RT ≥ 12 kΩ

CT = 1200 pF, RT ≥ 12 kΩ

IOUT = ±2.0 A, 50% EIN to 90% EOUT transition:

ENABLE on to source driver on

ENABLE off to source driver off

ENABLE on to sink driver on

ENABLE off to sink driver off

PHASE change to source driver on

PHASE change to source driver off

PHASE change to sink driver on

PHASE change to sink driver off

tpd(pwm)

Comparator trip to sink driver off

Thermal Shutdown Temperature

TJ

Thermal Shutdown Hysteresis

∆TJ

UVLO Disable Threshold

VCC(UVLO)

UVLO Hysteresis

∆VCC(UVLO)

Logic Supply Current

ICC(ON)

VENABLE = 0.8 V, VREF = 2.0 V

(No Load)

ICC(OFF)

VENABLE = VREF = 2.0 V

ICC(BRAKE) VREF = 0.8 V

NOTES: 1. Typical Data is for design information only.

2. Each driver is tested separately.

3. Negative current is defined as coming out of (sourcing) the specified device terminal.

Min.

Limits

Typ. Max. Units

4.5

5.0

5.5

V

2.0

–

–

V

–

–

0.8

V

–

<1.0 20

µA

– <-2.0 -200 µA

2.0

–

VCC

V

25

40

55 µA

9.5 10.0 10.5 –

18

20

22

µs

–

1.7 3.0 µs

–

2.5 3.8 µs

–

2.9

–

µs

–

0.7

–

µs

–

2.4

–

µs

–

0.7

–

µs

–

2.9

–

µs

–

0.7

–

µs

–

2.4

–

µs

–

0.7

–

µs

–

0.8 1.5 µs

–

165

–

°C

–

15

–

°C

3.15 3.50 3.85 V

300 400 500 mV

–

20

30 mA

–

12

18 mA

–

26

40 mA

115 Northeast Cutoff, Box 15036

4

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

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