A3948(2007) データシートの表示（PDF） - Allegro MicroSystems

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A3948
(Rev.:2007)

DMOS FULL-BRIDGE PWM MOTOR DRIVER

Allegro MicroSystems 

3948

DMOS FULL-BRIDGE

PWM MOTOR DRIVER

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

20 – 50

V

0 – 50

V

Output Leakage Current

Output On Resistance

Body Diode Forward Voltage

Load Supply Current

IDSS

rDS(on)

VF

IBB

VOUT = VBB

VOUT = 0 V

Source driver, IOUT = -1.5 A

Sink driver, IOUT = 1.5 A

Source diode, IF = -1.5 A

Sink diode, IF = 1.5 A

fPWM < 50 kHz

Charge pump on, outputs disabled

– <1.0 20 µA

– <-1.0 -20 µA

– 500 550 mΩ

– 300 350 mΩ

– 1.0 1.3 V

– 1.0 1.3 V

– 4.0 7.0 mA

– 2.0 5.0 mA

Sleep Mode

– – 20 µA

Control Logic

Logic Supply Voltage Range

Logic Input Voltage

Logic Input Current

(all inputs except ENABLE)

ENABLE Input Current

OSC input frequency

OSC input duty cycle

OSC input hysteresis

VDD

VIN(1)

VIN(0)

IIN(1)

IIN(0)

IIN(1)

IIN(0)

fOSC

dcOSC

–

Operating

VIN = 2.0 V

VIN = 0.8 V

VIN = 2.0 V

VIN = 0.8 V

Operating

Operating

Operating

4.5 5.0 5.5

2.0 – –

– – 0.8

– <1.0 20

– <-2.0 -20

– 40 100

– 16 40

1.8 – 6.1

40 – 60

200 – 400

V

V

V

µA

µA

µA

µA

MHz

%

mV

Input Hysterisis

– All digital inputs except OSC

50 – 100 mV

Reference Input Volt. Range

Reference Input Current

Comparator Input Offset Volt.

VREF

IREF

VIO

Operating

VREF = 2.5 V

VREF = 0 V

0.0 – VDD - 0.1 V

– – ±0.5 µA

– 0 ±5.0 mV

Continued next page …

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