1992 Harris Intelligent Power HVIC/IGBT HALF-BRIDGE CONVERTE
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AN9105.1
1992
Harris Intelligent Power
HVIC/IGBT HALF-BRIDGE CONVERTER EVALUATION CIRCUIT
Author: George Danz HVIC high voltage integrated circuit designed drive n-channel IGBTs MOSFETs half-bridge configuration 500VDC. Power supply motor control inverters configured voltages 230VAC using HVIC, IGBTs other components. precautions should taken using circuit. Lead lengths between external power circuit (including gate pilot leads), bypass capacitor (CDD), bootstrap diode (DF) capacitor (CF) HVIC should minimized. basic components required evaluate features SP601 shown simplified schematic. recommended load largely resistive that largest current component will flow through IGBTs, IGT1 IGT2. flyback diodes, rated will carry much smaller flyback current component. small amount load inductance will cause switching waveforms simulate conditions which would normally observed with motor transformer loads, while limiting current carried lower rated flyback diodes this circuit. values RPUa, RPUb, etc., have been chosen result overcurrent trip approximately 25Apk. this level current, heat sinking IGTs flyback diodes required. series resistance upper lower pilot resistor dividers would approximately divider ratio should cause 0.1V desired trip current. When first energizing your evaluation circuit, begin with reduced voltage about 20VDC 30VDC verify proper circuit operation before proceeding higher voltages. More specific information found File Number 2428 File Number 2429 Half-Bridge 500VDC Driver data sheets Application Note, AN-8829.1.
25VDC VLINK 500VDC IGT1 PULSE +15V UP/DOWN VBIAS PHASE VOUT TRIPU FAULT FAULT +15V ENABLE TRIPL RPLb VLINK IGT2 RPLa RPUb VLINK 0.22 RPBa
Simplified Schematic
HVIC
10µF
HVIC Harris Part SP601 (Formerly GS601) IGT1, Harris Part HGTA24N60D1C
Copyright
Harris Part RUR860 Harris Part A114M
RPUa, RPLa 910, 1.8W RPUb, RPLb 1.8W
0.1µF, 600VDC
Harris Corporation 1992 11-169
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