 # AND8016 डेटा पत्रक PDF( Datasheet डाउनलोड )

## डेटा पत्रक - Design of Power Factor Correction Circuit Using Greenline Compact Power Factor Controller - ON Semiconductor

 भाग संख्या AND8016 समारोह Design of Power Factor Correction Circuit Using Greenline Compact Power Factor Controller मैन्युफैक्चरर्स ON Semiconductor लोगो पूर्व दर्शन 1 Page ```  AND8016/D eliminates boost rectifier reverse recovery loss as MOSFET cannot turn–on until the inductor current reaches zero. Secondly, since there are no dead–time gaps between cycles, the ac line current is continuous thus limiting the peak switch to twice the average input current. The converter works right on critical conduction mode, which results in variable frequency operation. Inductor Waveform V L + di dt (1) Equation (1) is the center of the operation of PFC boost converter where V=Vin(t), the instantaneous voltage across the inductor. Assuming the inductance and the on–time over each line half–cycle are constant, di is actually the peak current, ILpk, this is because the inductor always begins charging at zero current. Vin(t) Vinpk ILpk IL(t) Iinpk Iin(t) ON MOSFET OFF Figure 2. Inductor Waveform Design Criteria The basic design specification concerns the following: • Mains Voltage Range: Vac(LL) – Vac(HL) • Regulated DC Output Voltage: Vo • Rated Output Power: Po • Expected Efficiency, h PFC Power Section Design Instantaneous Input Voltage, Vin(t) Peak Input Voltage, Vinpk Both Vin(t) and Vinpk are related by below equation Vin(t) + Vinpksin(ωt) where Vinpk + Ǹ2 Vinrms Instantaneous Input Current, Iin(t) Peak Input Current, Iinpk, Both Iin(t) and Iinpk are related by below equation Iin(t) + Iinpk sin(ωt), (2) (3) (4) where Iinpk + Ǹ2 Iinrms (5) Input power of the PFC circuit, Pin can be expressed in following equation, by substituting equation (3) and (5). @Pin + Vinrms Iinrms + Vinpk Ǹ2 Iinpk Ǹ2 + Vinpk Iinpk 2 (6) The output power, Po is given by: Po + VoIo + ηPin (7) PFC circuit efficiency is needed in the design equation, for low line operation, it is typically set at 92% while 95% for high line operation. Substituting equation (6) into equation (7), Po + ηPin +η Vinpk Iinpk 2 Express the above equation in term of Iinpk, Iinpk + 2Po ηVinpk + Ǹ2 Po ηVinrms (8) (9) The average input current is equal to average inductor current, IL(avg), IL(avg) + Iin (10) It has been understood that peak inductor current, ILpk is exactly twice the average inductor current, IL(avg) for critical conduction operation. ILpk + 2IL(avg) + 2 Ǹ2 Po ηVinrms (11) Since ILpk is maximum at minimum required ac line voltage, Vac(LL), ILpk + 2 Ǹ2 Po ηVac(LL) (12) Switching Time In theory, the on–time, t(on) is constant. In practice, t(on) tends to increase at the ac line zero crossings due to the charge on output capacitor Cout. Let Vac = Vac(LL) for initial t(on) and t(off) calculations. On–time By solving inductor equation (1), on–time required to charge the inductor to the correct peak current is: t(on) + ILpk LP Vinpk (13) Substituting equation (3) and (12) into equation (13), results in: @t(on) + 2 Ǹ2 Po ηVac(LL) LP Ǹ2 Vac(LL) + 2Po LP ηV2ac(LL) (14) http://onsemi.com 2 http://www.Datasheet4U.com ``` विन्यास 12 पेज डाउनलोड [ AND8016 Datasheet.PDF ]

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 भाग संख्या विवरण विनिर्माण AND8016 Design of Power Factor Correction Circuit Using Greenline Compact Power Factor Controller ON Semiconductor AND8016D Design of Power Factor Correction Circuit Using Greenline Compact Power Factor Controller ON Semiconductor

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