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PDF IR3221 Data sheet ( Hoja de datos )
| Número de pieza | IR3221 | |
| Descripción | FULLY PROTECTED H-BRIDGE for DC MOTOR | |
| Fabricantes | International Rectifier | |
| Logotipo |  |
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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
SS
IR 3221
Gnd
IN 1 LS gate 1
M1
M 2 LS gate 2 IN 2
R
5V
C
G
TO 220 Mosfet
D
S
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
1 page  
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)
SS
M1-M2
(M2-M1)
Vss+
Vss-
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
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet IR3221.PDF ] | |
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