4

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

115 Northeast Cutoff, Box 15036

www.allegromicro.com

3946

Half-Bridge Power MOSFET Controller

Limits

Characteristics

Symbol

Test Conditions

Min.

Typ.

Max.

Units

Protection

VREG Undervoltage

V

REGON

V

8.6

9.1

9.6

V

VREG Undervoltage

V

REGOFF

V

7.8

8.3

8.8

V

BOOT Undervoltage

V

BSON

V

8

8.75

9.5

V

BOOT Undervoltage

V

BSOFF

V

7.25

8.0

8.75

V

Thermal Shutdown Temperature

T

JTSD

Temperature increasing

–

170

–

°C

Thermal Shutdown Hysteresis

ΔT

J

Recovery = T

–

15

–

°C

Logic

Input Current

I

IN(1)

IN1 V

–

40

100

μA

I

IN(0)

IN1 V

–

16

40

μA

RESET pin only

––

1

μA

Logic Input Voltage

V

IN(1)

IN1 / IN2 logic high

2.0

––

V

RESET logic high

2.2

––

V

V

IN(0)

Logic low

––

0.8

V

Logic Input Hysteresis

–

All digital inputs

100

–

300

mV

Fault Output

V

ol

I = 1 mA, fault asserted

––

400

mV

V

oh

V = 5 V

––

1

μA