LLC自动计算公式(输入数据即可)
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1. PFC calculations DRAFT
in- and output parameters
VAC_min90Vac minimum mains input voltage (rms)User input
VAC_max277Vac maximum mains input voltage (rms)Calculation result
Vboost_min415Vdc minimum PFC output voltage Datasheet parameter
Vboost_nom 430Vdc maximum PFC output voltage
Po90W output power
eff0.92efficiency PFC + LLC
Pin97.8W input power
PFC inductor calculations
Ip_max 3.38A maximum peakcurrent (incl +10%)
Fs_min30000Hz Fs_min at Vboost_min
Lp972uH calculated primary inductance
Lp_corr250uH chosen primary inductance small Ae conversion tool:
Ae0.00010m2effective area96.6mm2
Bmax0.220T Bmax core1E-04m2
Np39.8minimum number of turns
Np_corr40chosen number of primary turns
Bmax_calc0.219T
Na 2.3maximum number of PFCaux turns
PFC current sense resistor
V_OCR_OCP0.50V
Ip_max 3.38A
Vmargin0.05V
Rsense_current_pfc133.06mOhm
SNSBOOST
Vregulation_SNSBOOST = 2.5V
V_BOOST_nominal =430V
R_BOOST_1 = 4.7Mohm470
4.7M
R_BOOST_2 = 4.7Mohm4700
Rmeasure_BOOST =55.0kOhm 4.7M
Power in R_BOOST_ total
P_R_BOOST_total20mW power in bleeder
55.0k
Boost elcap
Vboost_peak452V peak-voltage at PFC start-up = OVP
HBC start-stop
Vboost_start_HBC396V HBC brown out
Vboost_stop_HBC275V HBC brown out
Brown Out
R1=2000kOhm
R2=2000kOhm R2=R12000k
R3=560kOhm560
220nF
R4=47kOhm4702000k
Rv=466kOhm
V Brown-Out =67.6Vac0
560k
Mains discharge
Cmains220nF
Rdischarge2466kOhm47k
RxC=542ms
Design summary:
Vin range mains90277Vac
Vboost range415430Vdc
Pout,max90W
maximum PFC peak current 3.4A
PFC coil250uH
PFC coil & aux40 2.3Turns
resistor value for PFC current measurement133mOhm
nominal Boost voltage430V
values: R_BOOST1+2, Rmeasure_BOOST9.400.055Mohm
BOOST, HBC brown-out start, stop voltage396275V
Mains brown-out voltage67.6Vac
Mains brown-out resistors on mains R1, R220002000kOhm
Mains brown-out resistors on SNSMAINS R3, R456047kOhm
capacitor value across mains220nF
RC discharge mains542ms