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 

Preliminary Data Sheet No. PD60205

IR3221

FULLY PROTECTED H-BRIDGE for DC MOTOR

Features

• Over temperature shutdown

• Over current shutdown

• Ιnrush current limited by Soft-Start

sequence

• E.S.D protection

• Sleep mode for direct battery connection

• Braking / non-braking operation

• Internal switching oscillator

• Direct interface for End switches

Product Summary

Rdson

Vcc.op.

I cont. ( heat sink )

I shutdown

Oper. Freq.

15 mΩ max.

5.5 to 35 V

20.0 A

50 A

20 kHz

Description

Packages

The IR3221 is a Fully Protected Dual High Side Switch

I.C. With two additional Low Side switches (IRL1404),

the IR3221 drives and controls the whole H bridge

topology. It provides shoot-through protection for each

leg, H bridge logic control, soft-start sequence and

over-current /over-temp. protections. The signals IN1

and IN2 select the operation modes and the PWM

Soft-Start sequence cycles the corresponding active

low side switch in order to limit the motor inrush cur-

rent. By using the recommended part number and the

SIP 15

TO220 - IRL1404

proper cooling, the inner High Side IPS protects the

whole H-bridge function. The Soft-Start sequence is programmed by an RC time constant and reset itself

automatically.

Block Diagram

+ Bat.

VCC

Gnd

IR 3221

SS

IN 1 LS gate 1

M1

M2

LS gate 2 IN 2

R

5V

C

D

G

S TO 220 Mosfet

D

G

S TO 220 Mosfet

+5V

Clockwise motion

10 k

Counter clockwise motion

10 k

Debouncing

RC networks

( e;g 10 nF )

Micro

Controller

Electrical stop

Electrical stop

0V

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