FAN9612 datasheet(1/18 Pages) FAIRCHILD

Teilenummer	FAN9612

Bauteilbeschribung	Design Consideration for Interleaved Boundary Conduction Mode PFC

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Rev. 1.0.4 • 4/22/10

AN-6086

Design Consideration for Interleaved Boundary

Conduction Mode PFC Using FAN9611/12

1. Introduction

This application note presents practical step-by-step design

considerations for an interleaved Boundary-Conduction-

Mode (BCM) Power-Factor-Correction (PFC) converter

employing Fairchild PFC controllers FAN9611 and

FAN9612. It includes designing the inductor and Zero-

Current-Detection

(ZCD)

circuit,

selecting

the

components, and closing the control loop. The design

procedure is verified through an experimental 400W

prototype converter.

The FAN9611/12 interleaved dual BCM PFC controller

operates two parallel-connected boost power trains 180º

out of phase, extending the maximum practical power level

of this control technique from 200-300W to greater than

800W. Unlike the Continuous Conduction Mode (CCM)

technique often used at this power level, BCM offers

inherent zero-current switching of the boost diodes (no

reverse-recovery losses), which permits the use of less

expensive

diodes

without

sacrificing

efficiency.

Furthermore, the input and output filters can be made

smaller due to ripple cancellation between the power

stages and the effective doubling of the switching

frequency. The advanced line feed-forward with peak

detection circuit minimizes the output voltage variation

during line transients. To guarantee stable operation with

less switching loss at light load, the maximum switching

frequency

is

clamped

at

525kHz.

Interleaved

synchronization

is

maintained

under

all

operating

conditions. Protection functions include output over-

voltage,

over-current,

open-feedback,

under-voltage

lockout, brownout protection, and secondary latching

over-voltage protection.

Figure 1. Typical Application Circuit of FAN9611 or FAN9612

Ähnliche Beschreibung - FAN9612

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Fairchild Semiconductor	AN-8035	1Mb / 22P	Boundary Conduction Mode Power Factor Correction (PFC)
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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

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