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參數(shù)資料
| 型號(hào)： | IR3221 |
| 廠商： | International Rectifier |
| 英文描述： | FULLY PROTECTED H-BRIDGE for DC MOTOR |
| 中文描述： | 充分保護(hù)H型直流電橋 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 96K |
| 代理商： | IR3221 |
4
IR3221
www.irf.com
Protection Characteristics
(High side switch protection)
Symbol
Parameter
Min.
Typ.
Max.
Unit
Test Conditions
Tsd
Over-temperature threshold
-
165
-
°C
see fig. 2
Isd
Over-current threshold
42
50
60
A
see fig. 2
T reset
Note :
Minimum time to reset protections
300
-
μ
S
IN1=IN2 = 0 V
The low side switches present sufficient cooling capability in order to have the whole H-bridge function
protected by the IR 3221 inner temperature sensor.
Block Diagram
Truth Table
IN1 IN2
MODES
HS1
LSS1
HS2
LSS2
SS reset
L
L
L
H
H
H
L
H
H
L
L
H
Stand-by with braking - sleep mode **
forward rotation ( normal operation )
forward rotation ( protection triggered )
reverse rotation ( normal operation )
reverse rotation ( protection triggered )
Stand-by without braking
OFF
OFF
OFF
ON
OFF
OFF
ON
ON*
ON*
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON*
ON*
OFF
ON
OFF
OFF
OFF
OFF
ON
* During Soft-Start sequence, the low side part is switching. ** Protections are reset in this mode
H Bridge logic control
& status feedback
VCC
VCC
SS
IN 1
IN 2
Shoot-through
protection
M 2
G 1
M 1
G 2
Oscillator
Gnd
Gnd
+
-
Soft Start duty cycle
S S reset
Over current
shutdown
Over temp.
protection
10 mA
Over current
shutdown
Shoot-through
protection
Low Side
Driver
Low Side
Driver
40 V Active Clamp
40 V Active Clamp
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