3948 datasheet(3/12 Pages) ALLEGRO

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3948

DMOS FULL-BRIDGE

PWM MOTOR DRIVER

www.allegromicro.com

ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 50 V, VDD = 5.0 V, VSENSE = 0.5 V,

fPWM < 50 kHz (unless noted otherwise)

Limits

Characteristics

Symbol Test Conditions

Min.

Typ. Max.

Units

Output Drivers

Load Supply Voltage Range

VBB

Operating

–

During sleep mode

–

Output Leakage Current

IDSS

VOUT = VBB

–

<1.0

µA

VOUT = 0 V

–

<-1.0

-20

µA

Output On Resistance

rDS(on)

Source driver, IOUT = -1.5 A

–

500

550

Ω

Sink driver, IOUT = 1.5 A

–

300

350

Ω

Body Diode Forward Voltage

Source diode, IF = -1.5 A

–

1.0

1.3

Sink diode, IF = 1.5 A

–

1.0

1.3

Load Supply Current

IBB

fPWM < 50 kHz

–

4.0

7.0

Charge pump on, outputs disabled

–

2.0

5.0

Sleep Mode

–

µA

Control Logic

Logic Supply Voltage Range

VDD

Operating

4.5

5.0

5.5

Logic Input Voltage

VIN(1)

2.0

–

VIN(0)

–

0.8

Logic Input Current

IIN(1)

VIN = 2.0 V

–

<1.0

µA

(all inputs except ENABLE)

IIN(0)

VIN = 0.8 V

–

<-2.0

-20

µA

ENABLE Input Current

IIN(1)

VIN = 2.0 V

–

100

µA

IIN(0)

VIN = 0.8 V

–

µA

OSC input frequency

fOSC

Operating

1.8

–

6.1

MHz

OSC input duty cycle

dcOSC

Operating

–

OSC input hysteresis

–

Operating

200

–

400

Input Hysterisis

–

All digital inputs except OSC

–

100

Reference Input Volt. Range

VREF

Operating

0.0

–

VDD - 0.1

Reference Input Current

IREF

VREF = 2.5 V

–

±0.5

µA

Comparator Input Offset Volt.

VIO

VREF = 0 V

–

±5.0

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