Transcription of Buck Current/Voltage Fed Push-Pull PWM Controllers (Rev. D)
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Example: air traffic controller
Buck Current/Voltage Fed Push-Pull PWM Controllers (Rev. D)
RDQS20 DELAY23 GND11 VCCREF15RT17CT18 SYNC19 CSA 9 CSA+8SS4 CSAO7 CEA 13 VEA 16 VEA+142224321 RAMPCEA+12 CEAOVEAO10 PULLPGNDPUSHSRCBUCKV+DELAYDELAYTQQREF&UV LOSSINHBTUVOSC500 kHzMAX6521 current SenseAmplifierILIM Comparator+3 VCurrent ErrorAmplifierPWM VFlyingDriverPush/PullDriversOSCUVLOV oltage ErrorAmplifier+UC2827-1,UC2827-2UC3827-1 , APRIL1999 REVISEDAPRIL2011 BUCKCURRENT/VOLTAGEFEDPUSH-PULLPWMCONTRO LLERSC heckforSamples:UC2827-1,UC2827-2, UC3827-1,UC3827-21 FEATURESDESCRIPTION IdealforMultipleOutputand/orHighTheUC382 7familyofcontrollerdevicesprovidesanVolt ageOutputVoltageConvertersintegratedcont rolsolutionforcascadedbuckand HighVoltage,HighCurrentFloatingcurrentfe dorvoltagefedpush- UC3827-1 CurrentFedControllerhasvoltagefedmodes,t hepush-pullswitchesaredrivenPush-PullDri verswithOverlappingat50% UC3827-2 VoltageFedControllerhasfedmode, ,thetwoswitchesaredrivenwitha specified AverageCurrentMode,PeakCurrentgaptimebet weentheswitchestopreventshortingModeorVo ltageModewithInputthetransformeracrossth eenergystoragecapacitorVoltageFeedforwar dControlforBuckandtoprohibitexcessivecur rentsflowingthroughthePowerStagedevices.
UC2827-1,UC2827-2 UC3827-1,UC3827-2 SLUS365D –APRIL 1999–REVISED APRIL 2011 www.ti.com DESCRIPTION (CONTINUED) The UC3827 can be set up in traditional voltage mode control using input voltage feedforward technique or in
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