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HVIC/IGBT Half-Bridge Converter Evaluation Circuit
Application Note May 1992 AN-7508
Author: George Danz The HVIC high voltage integrated circuit is designed to drive n-channel IGBTs or MOSFETs in a half-bridge configuration up to 500VDC. Power supply and motor control inverters can be configured for voltages up to 230VAC using the HVIC, IGBTs and a few other components. A few precautions should be taken in using the circuit. Lead lengths between the external power circuit (including gate and pilot leads), the 15V bypass capacitor (CDD), the bootstrap diode (DF) and capacitor (CF) and the HVIC should be minimized. The basic components required to evaluate the features of the SP601 are shown in the simplified schematic. The recommended load is largely resistive so that the largest current component will flow through the IGBTs, IGT1 and IGT2. The flyback diodes, D1 and D2, rated 8A, will carry a much smaller flyback current component. A small amount of load inductance will cause the switching waveforms to simulate the conditions which would normally be observed with motor or transformer loads, while limiting the current carried by the lower rated flyback diodes in this circuit. The values for RPUa, RPUb, etc., have been chosen to result in overcurrent trip at approximately 25Apk. At this level of current, heat sinking for the IGTs and flyback diodes is required. The series resistance of the upper and lower pilot resistor dividers would be approximately 1K; the divider ratio should cause 0.1V at the tap at the desired trip current. When first energizing your evaluation circuit, begin with a reduced bus voltage of about 20VDC to 30VDC to verify proper circuit operation before proceeding to higher voltages. More specific information can be found in File Number 2428 and File Number 2429 Half-Bridge 500VDC Driver data sheets and in the Application Note, AN-8829.1.
/Title AN75 8) Subect HVIC IGBT alfridge onerter valution iruit) Autho () Keyords ) Cretor () DOC NFO dfark
Simplified Schematic
25VDC VLINK 3 500VDC DF IGT1 D1 VDF VBS D1U G1U + 15V PULSE GEN +15V UP/DOWN VBIAS G2U PHASE VOUT TRIPU RPUb C1 50 100 VLINK 2 RL 20 3KW LL 1mH + 0.22 + CF RPBa
Pageode Useutine DOCIEW dfark
FAULT FAULT LED +15V
CL2 D1L
IGT2 D2 50 100 RPLa +
HVIC
ENABLE VDD VSS
G1L G2L CL1 TRIPL
VLINK 2 RPLb
CDD 10F
HVIC - Fairchild Part # SP601 (Formerly GS601) IGT1, 2 - Fairchild Part # HGTA24N60D1C
D1, 2 - Fairchild Part # RUR860 DF - Fairchild Part # A114M
RPUa, RPLa - 910, 1.8W RPUb, RPLb - 68, 1.8W
C1 - 0.1F, 600VDC RL - 20, 3KW 13 -50
(c)2002 Fairchild Semiconductor Corporation
Application Note Rev. A1
TRADEMARKS
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ACEx Bottomless CoolFET CROSSVOLT DenseTrench DOME EcoSPARK E2CMOSTM EnSignaTM FACT FACT Quiet Series
DISCLAIMER
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SILENT SWITCHER a UHC SMART START UltraFET a SPM VCX STAR*POWER Stealth SuperSOT-3 SuperSOT-6 SuperSOT-8 SyncFET TinyLogic TruTranslation
STAR*POWER is used under license
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY FAIRCHILDS PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component is any component of a life 1. Life support devices or systems are devices or support device or system whose failure to perform can systems which, (a) are intended for surgical implant into be reasonably expected to cause the failure of the life the body, or (b) support or sustain life, or (c) whose support device or system, or to affect its safety or failure to perform when properly used in accordance with instructions for use provided in the labeling, can be effectiveness. reasonably expected to result in significant injury to the user. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only.
Preliminary
No Identification Needed
Full Production
Obsolete
Not In Production
Rev. H5

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