准谐振反激变压器设计

V-wish Vf Ns Ns-sel V-result PIV
V V
V V
Vo-5V 12 0.45 9 12 12.45 116.1
? 5 0.45 2 2 5 9.2
? 0 0.7 0 3 4.75 24.8
? 0 0.7 0 3 4.75 24.8
Secondary average current Secondary rms current Secondary rms ripple current Secondary output power Leakage voltage spike NVo+Vdc Peak drain voltage at switch opening Vds rising slope
QR Flyback converter design
Item Po
Date : 2006-08-01 By : Martin Hsiao
Unit W
Description Output power Efficiency Output voltage Sec. diode forward drop Input voltage Primary turns Secondary Turns Turn ratio Np:No Reflected voltage Primary inductance Resonating cap. Leakage inductance Switching frequency Switching period Effective core corss-section area Max. flux density Primary peak current Primary rms current Current sensing resistor Current sensing resistor selected 1.425V : VCO starts, 1.45V : min. freq.
0.00 0.000 0.0 0 184.3 509.0 693.3 2.4
0.00 0.000 0.0 0 184.3 509.0 693.3 2.4
On duty cycle Reset dytu cycle (Valley+Rising) duty cycle
Don Doff Dw+Dleak
0.170 0.646 0.184
0.475 0.366 0.158
0.172 0.633 0.194
0.172 0.633 0.194
Io Isrms Isac-rms Po-sec Vspike NVo+Vdc Vds peak Vds slope
ቤተ መጻሕፍቲ ባይዱ
A Arms Arms
W
V V kV/µs
1.30 1.867 1.3 15.6 156.5 480.0 636.5 3.7
4.00 7.632 6.5 20 247.0 289.5 536.5 1.1
22 0.85 20 0.45 380 44 9 4.89 99.98 534 220 8 147.4 6.79 56 177.9 0.821 0.195 0.609 0.200 0.164 1.336
20 0.85 5 0.45 126 60 2 30.00 163.50 2,000 700 68 37.8 26.46 54 489.1 0.792 0.315 0.631 0.500 0.396 1.104
20 0.85 5 0.45 400 60 3 20.00 109.00 1,000 300 20 96.7 10.35 54 220.3 0.714 0.171 0.700 0.700 0.500 1.000
20 0.85 5 0.45 400 60 3 20.00 109.00 1,000 300 20 96.7 10.35 54 220.3 0.714 0.171 0.700 0.700 0.500 1.000
η
Vo Vf Vdc Np No N NVo Lp Cp Lleak F T Ae Bmax Ip Iprms Rs Rs-sel Ip*Rsense Vctrl
V V V
V µH pF µH kHz µs mm2 mT A A ohm ohm V V
Output name : Secondary diode drop Secondary turns Secondary turns selected Calculated Vout PIV of secondary diodes