IR3221 データシートの表示（PDF） - International Rectifier

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IR3221

FULLY PROTECTED H-BRIDGE for DC MOTOR

International Rectifier 

IR3221

Lead Definitions

Vcc

Positive power supply

M1

Motor 1 output ( high side source - leg 1 )

M2

Motor 2 output ( high side source - leg 2 )

G1

Gate 1 drive output ( low side gate - leg 1 )

G2

Gate 2 drive output ( low side gate - leg 2 )

Gnd

Power supply return

IN1

Logic input 1 ( Leg 1 Cdt. / mode )

IN2

Logic input 2 ( Leg 2 Cdt. / mode )

SS

RC soft-start input ( the voltage on this input

drives the switching duty cycle )

Recommended Low Side Mosfet

IRL1404

4.5 m Ω / 40 V – TO 220 packaged Power Mosfet

Lead Assignments

m1 m1 m1 nc g1 gnd ss Vcc in2 in1 g2 nc m2 m2 m2

SIP 15

IR 3221

Soft-Start Sequence

IN1

(IN2)

Vss+

SS

Vss-

M1-M2

(M2-M1)

Duty cycle modulation follows SS voltage

Tss ( approximately 2 x RC time constant )

www.irf.com

GDS

TO 220

IRL1404

t

t

t

Trd

5

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