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IR3221 Datasheet

  • IR3221

  • FULLY PROTECTED H-BRIDGE for DC MOTOR

  • 98.63KB

  • 10頁

  • IRF

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Preliminary Data Sheet No. PD60205
IR3221
FULLY PROTECTED H-BRIDGE for DC MOTOR
Features
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Over temperature shutdown
Over current shutdown
螜nrush
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 m鈩?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-
SIP 15
TO220 - IRL1404
rent. By using the recommended part number and the
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
+5V
SS
IN 1 LS gate 1
IR 3221
M1
M2
LS gate 2
IN 2
Clockwise motion
10 k
R
D
G
TO 220 Mosfet
D
G
10 k
Counter clockwise motion
TO 220 Mosfet
S
S
5V
C
Debouncing
RC networks
( e;g 10 nF )
Micro
Controller
Electrical stop
Electrical stop
0V

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