Transcription of Calculating Motor Driver Power Dissipation - TI.com
{{id}} {{{paragraph}}}
Example: tourism industry
Calculating Motor Driver Power Dissipation - TI.com
ApplicationReportSLVA504 motordriverICfora particularapplication, givenapplication,anestimationofthetotalm otordriverpowerdissipationis MotorDriverTherearea numberofsourcesofpowerdissipationinsidea ,likethepowerdissipatedin theFETON-resistance, , (ON)DissipationThebiggestsourceofpowerdi ssipatedinsidea motordriverICis thepowerdissipatedin theFETON-resistance,orRDS(ON). Thepowerdissipatedin anH-bridge(consistingofa high-sideFETanda low-sideFET)is calculatedwiththefollowing:PRDS= (HS-RDS(ON) (IOUT(RMS))2) + (LS-RDS(ON) (IOUT(RMS))2)wherePRDSis thepowerdissipatedin theoutputFETs,HS-RDS(ON)is theresistanceofthehigh-sideFET,LS-RDS(ON )is theresistanceofthelowsideFET,andIOUT(RMS )is (ON)increaseswithtemperature,asthedevice heats, a devicehastwoH-bridges,likea typicalsteppingmotordriver, ,theoutputdevicestraversea a functionofthefollowing: riseandfalltimesoftheoutput,howquicklyth eoutputswingsfromoneextremetotheother supplyvoltage outputcurrent frequencythattheoutputis switchingInsom
Sources of Power Dissipation in a Motor Driver www.ti.com As an approximation, switching losses for each output are calculated as follows: PSW = PSW_RISE + PSW_FALL where PSW is the total switching loss (in watts) for one output, and PSW_RISE is the power dissipated during the rising edge, and PSW_FALL is dissipated during the falling edge. Expanding on this:
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
Related search queries
INSULATION POWER FACTOR TESTING of POWER, Power factor, Dissipation factor, DISSIPATION FACTOR, POWER FACTOR, AND, Power Factor Correction Power Factor Correction, Power Factor Correction (PFC) application, Understanding Thermal Dissipation and Design, Power, Power Film Capacitor Application Guide, Material electrical and thermal properties