A3946KLBTR datasheet(3/13 Pages) ALLEGRO

Part #	A3946KLBTR

Description	Half-Bridge Power MOSFET Controller

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Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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

115 Northeast Cutoff, Box 15036

www.allegromicro.com

3946

Half-Bridge Power MOSFET Controller

ELECTRICAL CHARACTERISTICS

at T

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

Characteristics

Symbol

Test Conditions

Limits

Min.

Typ.

Max.

Units

V

BB Quiescent Current

I

VBB

RESET = High, Outputs Low

–

36

mA

RESET = Low

––

10

μA

VREG Output Voltage

V

REG

V

BB > 7.75 V, Ireg = 0 mA to 15 mA

12.0

13

13.5

V

BB = 7 V to 7.75 V, Ireg = 0 mA to 15 mA

11.0

–

13.5

V

Charge Pump Frequency

F

CP

CP1, CP2

–

62.5

–

kHz

VREF Output Voltage

V

REF

I

REF ≤ 4 mA, CREF = 0.1 μF

4.5

–

5.5

V

Gate Output Drive

Turn On Time

t

rise

C

LOAD = 3300 pF, 20% to 80%

–

60

100

ns

Turn Off Time

t

fall

C

LOAD = 3300 pF, 80% to 20%

–

40

80

ns

Pullup On Resistance

R

DSUP

T

j = 25°C

–

4

–

Ω

T

j = 135°C

–

6

–

Ω

Pulldown On Resistance

R

DSDOWN

T

j = 25°C

–

2

–

Ω

T

j = 135°C

–

3

–

Ω

Short Circuit Current –

Source

–

t

pw < 10 μs

800

––

mA

Short Circuit Current –

Sink

–

t

pw < 10 μs

1000

––

mA

GH Output Voltage

V

GH

t

pw < 10 μs, Bootstrap Capacitor fully charged

V

REG – 1.5

––

V

GL Output Voltage

V

GL

–

V

REG – 0.2

––

V

Timing

Dead Time (Delay from

Turn Off to Turn On)

t

DEAD

R

dead = 5 kΩ

200

350

500

ns

R

dead = 100 kΩ

567

μs

Propagation Delay

t

PD

Logic input to unloaded GH, GL. DT = VREF

––

150

ns

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