A1442 データシートの表示（PDF） - Allegro MicroSystems

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A1442

Low Voltage Full Bridge Brushless DC Motor Driver with Hall Commutation and Soft Switching, and Reverse Battery, Short Circuit, and Thermal Shutdown Protection

Allegro MicroSystems 

A1442

Low Voltage Full Bridge Brushless DC Motor Driver

with Hall Commutation and Soft Switching,

and Reverse Battery, Short Circuit, and Thermal Shutdown Protection

OPERATING CHARACTERISTICS valid over the full VDD and TA range unless otherwise noted

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Supply Voltage1

VDD

Operating, TJ < TJ(max); CBYP = 0.1 μF

2.0

–

4.2

Supply Current

IDD(ON)

VIN >VINHI, , TA = 25°C, no load

VIN < VINLO , TA = 25°C

–

4

6

–

–

10

Total Output On Resistance2,3

RDS(on)

VDD = 2 V, IOUT = 70 mA, TA = 25°C

VDD = 3 V, IOUT = 70 mA, TA = 25°C

–

3.9

–

–

2.6

–

VDD = 4 V, IOUT = 70 mA, TA = 25°C

–

2.2

–

Reverse Battery Current

IRDD

VRDD = –4.2 V

–

–

–10

Sleep Input Threshold

VINHI

VINLO

0.7×VDD

–

–

–

0.2×VDD

Sleep Input Current

IIN

VIN = 3.0 V

–

1.0

5

Reverse Sleep Current

Restart Delay4

IRIN

VRIN = –4.2 V

tRS

–

–

–10

–

120

–

Hall Chopping Settling Time

tS(CHOP)

–

80

–

BOP

–

35

75

Magnetic Switchpoints2

BRP

–75

-35

–

BHYS

–

70

–

Output Polarity

VOUT1

VOUT2

B < BRP

B > BOP

B < BRP

B > BOP

–

LOW

–

–

HIGH

–

–

HIGH

–

–

LOW

–

1 A bypass capacitor of 0.1 μF is required between VDD and GND for proper device operation through the full specified voltage range.

2 Extended VDD range affects RDS(on) and Bx.

3 Total On Resistance equals either RDS(on)Q1 + RDS(on)Q4 or RDS(on)Q2 + RDS(on)Q3.

4 The Restart Delay is the time the outputs are on or off when the device is attempting a restart.

Units

V

mA

A

Ω

Ω

Ω

mA

V

V

A

mA

ms

s

G

G

G

V

V

V

V

Allegro MicroSystems, Inc.

3

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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