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Power Pems MSK 4225 - M.S. Kennedy Corporation


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MIL-PRF-38534 CERTIFIED
75 VULI 20 AMP MUSFEI H-BRIDGE PWM MUTUR
DRIVER/AMPI IFIER
4225
4707 Dey Road Liverpool, N.Y. 13088
(315) 701-6751
FEATURES:
• Low RDS(UN) 0.013 Q Typical
• Low Cost Complète H-Bridge •20 Amp Capability, 75 Volt Maximum Rating
• Self-contained Smart Lowside/Highside Drive Circuitry
• Internal 45KHz PWM Generation, Shoot-through Protection
• Isolated Case Allows Direct Heatsinking
• Logic Level Disable Input
• Logic Level High Side Enable Input for Special Modulation or Function
DESCRIPTION:
The MSK 4225 is a complete H-Bridge circuit to be used for DC brushed motor control or Class D switchmode amplifi­cation. All of the drive/control circuitry for the lowside and highside switches are internal to the circuit. The 45KHz PWM circuitry is internal as well, leaving the user to only provide an analog signal for the motor speed/direction, or audio signal for switchmode audio amplification. The MSK 4225 is constructed in a space efficient plastic power package that can be directly bolted to a heatsink.
EQUIVALENT SCHEMATIC
©-©-
©-©-
o
©-©-©­0­0-
■O -G
45KHz pwm
generator
H-BRIDGE
DRIVE CIRCUITRY
-G
PIN-UUT INFURMATIUN
TYPICAL APPLICATIUNS
MSK 4225
7 dc i U
1 MOTOR)
11
1
NC
20
RSENSEA
2
VCC
19
RSENSEA
3
HEN
18
UUTPUTA
4
DIS
17
UUTPUTA
5
NC
16
V+
6
INPUT
15
V+
7
NC
14
UUTPUT B
8
GND
13
UUTPUT B
9
GND
12
RSENSEB
10
NC
11
RSENSEB
1
Rev. D 3/08

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