IR3221 Datasheet, PDF (1/10 Pages) International Rectifier – FULLY PROTECTED H-BRIDGE for DC MOTOR

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