Transcription of Bootstrap Circuitry Selection for Half Bridge Configurations
{{id}} {{{paragraph}}}
Example: dental hygienist
Bootstrap Circuitry Selection for Half Bridge Configurations
1 SLUA887 August2018 SubmitDocumentationFeedbackCopyright 2018,TexasInstrumentsIncorporatedBootstr apCircuitrySelectionfor half -BridgeConfigurationsApplicationRepo rtSLUA887 August2018 BootstrapCircuitrySelectionfor half -BridgeConfigurationsMamadouDiallo,H ighPowerDriversABSTRACTD rivingMOSFETsin half -bridgeconfigurationspresentmanychal lengesfor thosechallengesis generatingbiasfor the bootstrapcircuittakescareof this ,TI's 620 Vhalf-bridgegatedriverwith interlockto presentthe differentcomponentsin a bootstrapcircuitand how to properlyselectthemin orderto ensurepredictableswitchingof the of to to BootstrapDiodeReverseRecoveryTime(Zoomed Out)..55HB_HSRingingEffectson (Rboot= 0 Ohms)..77 VDD/HB-HSFastRampUp (Rboot= ).. of Tables1 IntroductionWhenusinghalf-bridgeconfigur ations,it is necessaryto generatehigh-sidebias to drivethe gateof thehigh-sideFET referencedto the of the mostpopularand cost effectiveway fordesignersto do so is the use of a bootstrapcircuitwhichconsistsof a capacitor,a diode,a resistorand applicationreportwill explainhow this circuitworks,the key componentsof the bootstrapcircuitsand theirimpactin the app notewill put emphasison half -bridgegatedrivesusingdriverswith no built-inbootstrapdiode,whichgivesdesigne rsflexibilityand reducespowerdissipati
A bootstrap circuit is used in half-bridge configurations to supply bias to the high-side FET. Figure 1 shows the charging path of a bootstrap circuit in a simplified half-bridge configuration using UCC27710, TI's 620V half-bridge driver with interlock. When the low-side FET is on (high-side FET is off), the HS pin and the
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: