3946_04 datasheet(4/13 Pages) ALLEGRO

4 / 13 page

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

REGON

REG increasing

8.6

9.1

9.6

VREG Undervoltage

REGOFF

REG decreasing

7.8

8.3

8.8

BOOT Undervoltage

BSON

BOOT increasing

8.75

9.5

BOOT Undervoltage

BSOFF

BOOT decreasing

7.25

8.0

8.75

Thermal Shutdown Temperature

JTSD

Temperature increasing

–

170

–

°C

Thermal Shutdown Hysteresis

ΔT

Recovery = T

JTSD – ΔTJ

–

°C

Logic

Input Current

IN(1)

IN1 V

IN / IN2 VIN = 2.0 V

–

100

μA

IN(0)

IN1 V

IN / IN2 VIN = 0.8 V

–

μA

RESET pin only

––

μA

Logic Input Voltage

IN(1)

IN1 / IN2 logic high

2.0

––

RESET logic high

2.2

––

IN(0)

Logic low

––

0.8

Logic Input Hysteresis

–

All digital inputs

100

–

300

Fault Output

I = 1 mA, fault asserted

––

400

V = 5 V

––

μA

ELECTRICAL CHARACTERISTICS at T

A = –40 to +135°C, VBB = 7 to 60 V (unless otherwise noted)

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