FAN9611 datasheet(3/18 Pages) FAIRCHILD

Teilenummer	FAN9611

Bauteilbeschribung	Design Consideration for Interleaved Boundary Conduction Mode PFC

Download	18 Pages

Scroll/Zoom	100%

Hersteller	FAIRCHILD [Fairchild Semiconductor]

Direct Link	http://www.fairchildsemi.com

Logo

3 / 18 page

AN-6086

www.fairchildsemi.com

Rev. 1.0.4 • 4/22/10

3

Figure 4. Frequency Variation of BCM PFC

Since the design of filter and inductor for a BCM PFC

converter with variable switching frequency should be

done at minimum frequency condition, it is worthwhile to

examine how the minimum frequency of BCM PFC

converter changes with operating conditions.

Figure 5 shows the minimum switching frequency, which

occurs at the peak of line voltage, as a function of the RMS

line voltage for three output voltage settings. It is

interesting to note that, depending on where the output

voltage is set, the minimum switching frequency may occur

at the minimum or at the maximum line voltage. When the

output voltage is approximately 405V, the minimum

switching frequency is the same for both low line (85VAC)

and high line (265VAC).

Figure 5. Minimum Switching Frequency vs. RMS Line

Voltage (L = 390µH, POUT = 200W)

3. Interleaving of BCM Boost PFC

One important characteristic of a BCM boost converter is

the high ripple current of the boost inductor, which goes

from zero to a controlled peak value in every switching

period. Accordingly, the power switch is also stressed with

high peak currents. In addition, the high ripple current must

be filtered by an EMI filter to meet high-frequency noise

regulations enforced for equipment connected to the mains.

These effects usually limit the practical output power level

of the converter below 300W. However, operating two

parallel-connected boost power stages 180º out of phase, as

shown in Figure 6; the high peak current and over-sized

EMI filter problems are solved, extending the maximum

practical power level of this control technique to greater

than 800W. This technique is called interleaving.

Figure 6. Interleaving Operation of BCM Boost PFC

Interleaving operation provides many advantages over the

single BCM PFC operation. The losses are distributed in the

switching devices, which also spreads the dissipated power

and eases the thermal management of the power stage

design. Interleaving also yields great benefits on EMI filter

size reduction since the effective switching frequency seen at

the input side of the converter is doubled, while the

combined ripple current is minimized due to the ripple

current cancellation, as shown in the waveforms of Figure 6.

Ähnliche Beschreibung - FAN9611

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Fairchild Semiconductor	AN-8035	1Mb / 22P	Boundary Conduction Mode Power Factor Correction (PFC)
Renesas Technology Corp	R2A20118ASP	282Kb / 10P	Critical Conduction Mode Interleaved PFC Control IC
	R2A20118ASP	102Kb / 10P	Critical Conduction Mode Interleaved PFC Control IC
	R2A20112ASP	111Kb / 9P	Critical Conduction Mode Interleaved PFC Control IC
	R2A20112SPDD	330Kb / 8P	Critical Conduction Mode Interleaved PFC Control IC
Sanken electric	SSC2102S	600Kb / 21P	Discontinuous Conduction Mode (DCM) Interleaved PFC IC
Renesas Technology Corp	R2A20118ASP	102Kb / 10P	Critical Conduction Mode Interleaved PFC Control IC
	R2A20112ASP	272Kb / 9P	Critical Conduction Mode Interleaved PFC Control IC
	R2A20112ASP	271Kb / 9P	Critical Conduction Mode Interleaved PFC Control IC Jan 08, 2016
	R2A20112SP	85Kb / 8P	Critical Conduction Mode Interleaved PFC Control IC

More results

FAN9611 Datenblatt(PDF) 3 Page - Fairchild Semiconductor

FAN9611 Datenblatt(HTML) 3 Page - Fairchild Semiconductor

Ähnliche Teilenummer - FAN9611

Ähnliche Beschreibung - FAN9611

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Datenblatt Download

Link URL