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VOLT MOSFET H-BRIDGE MOTOR DRIVER/AMPLIFIER 4225 (315) 701-6
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VOLT MOSFET H-BRIDGE MOTOR DRIVER/AMPLIFIER
4707 Road Liverpool, N.Y. 13088
FEATURES: RDS(ON) 0.013 Typical Cost Complete H-Bridge Capability, Volt Maximum Rating Self-contained Smart Lowside/Highside Drive Circuitry Internal 45KHz Generation, Shoot-through Protection Isolated Case Allows Direct Heatsinking Logic Level Disable Input Logic Level High Side Enable Input Special Modulation Function DESCRIPTION:
4225 complete H-Bridge circuit used brushed motor control Class switchmode amplification. drive/control circuitry lowside highside switches internal circuit. 45KHz circuitry internal well, leaving user only provide analog signal motor speed/direction, audio signal switchmode audio amplification. 4225 constructed space efficient plastic power package that directly bolted heatsink.
INPUT RSENSE RSENSE OUTPUT OUTPUT OUTPUT OUTPUT RSENSE RSENSE
ABSOLUTE MAXIMUM RATINGS
-40°C +85°C +150°C
+25°C Unless Otherwise Specified
4225 Parameter OUTPUT CHARACTERISTICS (ON) VDS(ON) Voltage Instantaneous Forward Voltage Reverse Recovery Time Leakage Current Frequency SUPPLY CHARACTERISTICS Analog Input=6VDC Output A,B=50% Duty Cycle Output A=100% Duty Cycle High Output B=100% Duty Cycle High Input Voltage Disable Input Input Voltage Input Current (DISABLE=0V) Input Voltage Input Input Voltage Input Current (HEN=0V) SWITCHING CHARACTERISTICS Rise Time Fall Time Dead Time RL=100 Each MOSFET ID=20A Each MOSFET ID=20A 0.45 0.013 0.52 Test Conditions Min. Typ. Max. Units
Each MOSFET IS=20A Intrinsic Diode Intrinsic Diode Each MOSFET V+=70V
Quiescent Bias Current Voltage Range
INPUT SIGNAL CHARACTERISTICS Analog Input Voltage Analog Input Voltage Analog Input Voltage LOGIC CONTROL INPUTS
Guaranteed design tested. Typical parameters representative actual device performance reference only. Vcc=+12V, V+=28V, RSENSE A,B=Ground, DIS=0V, HEN=N/C unless otherwise specified. Measured using 300µS pulse with Duty Cycle. Resistance specified Internal MOSFET Thermal Calculations. does include package resistance.
High Voltage Supply Logic Supply Continuous Output Current Peak Output Current Output Voltage Range min. max. Thermal Resistance 3.0°C/W (Output Switches 125°C)
Storage Temperature Range Lead Temperature Range Seconds) Case Operating Temperature MSK4225 Junction Temperature
-55°C +125°C 300°C
APPLICATION NOTES 4225 DESCRIPTIONS
voltage supply powering internal logic drivers lowside highside MOSFETS. supplies highside drivers derived from this voltage. higher voltage H-bridge supply. MOSFETS obtain drive current from this supply pin. voltage this limited drive MOSFETS rated volts. Proper by-passing with sufficient capacitance suppress voltage transients, ensure removing drooping during switching, should done close pins module possible. OUTPUT output half bridge. Decreasing input voltage causes increasing duty cycles this output. OUTPUT output other half bridge. Increasing input voltage causes increasing duty cycles this output. RSENSE connection bottom half bridge. This have sense resistor connection return ground current limit sensing, connected directly ground. maximum voltage this volts with respect GND. RSENSE connection bottom half bridge. This have sense resistor connection return ground current limit sensing, connected directly ground. maximum voltage this volts with respect GND. return connection input logic Vcc. INPUT analog input controlling pulse width bridge. voltage lower than Vcc/2 will produce greater than duty cycle pulses OUTPUT voltage higher than Vcc/2 will produce greater than duty cycle pulses OUTPUT DISABLE connection disabling output switches. DISABLE high overrides other inputs. When taken low, everything functions normally. internal pullup will keep DISABLE high left unconnected. connection enabling high side output switches. When taken low, overrides other inputs high side switches remain off. When high everything functions normally. internal pullup will keep high left unconnected.
TYPICAL SYSTEM OPERATION
This diagram typical application MSK4225. design voltage volts should have good bypass capacitor such tantalum electrolytic. analog input analog speed control voltage from potentiometer, other analog circuitry microprocessor converter. This analog input gets pulled current control circuitry proper direction reduce current flow bridge gets high. gain current control amplifier will have obtain proper amount current limiting required system.
Current sensing done this case sense resistor sense current from both legs bridge separately. important make high current traces possible keep inductance down. storage capacitor connected module should large enough provide high energy pulse without voltage sagging far. ceramic capacitor large polypropylene capacitor will required. Mount capacitor close module possible. connection between return should carrying motor current. sense resistor signal common mode filtered necessary feed limiting circuitry microprocessor. This application will allow full four quadrant torque control closed loop servo system. snubber network usually required, inductance power loop. important design snubber network suppress positive spikes above negative spikes below with respect ground. *There certain inductive load situations that possibly cause momentary shoot-through cross-conduction condition MSK4225. This shoot-through approximately 100nSec long several amps, depending layout impedence bypassing circuit. Most bypassing current sensing filtering will usually eliminate effects. However, case where still present, sense resistor trace lengths long, reversebiased ultra-fast recovery diodes power schottky diodes from RSENSE RSENSE power ground will minimize eliminate situation. Rev. 11/04
TYPICAL PERFORMANCE CURVES
Triangle Indicates NOTE: DIMENSIONS ±0.010 UNLESS OTHERWISE LABELED.
Part Number MSK4225S MSK4225D MSK4225U MSK4225G Screening Level Industrial Industrial Industrial Industrial Lead Configuration Straight Down Gull Wing
M.S. Kennedy Corp.
4704 Road, Liverpool, York 13088 Phone (315) 701-6751 (315) 701-6752 www.mskennedy.com
information contained herein believed accurate time printing. reserves right make changes products specifications without notice, however, assumes liability products. Please visit website most recent revision this datasheet.
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