FAIRCHILD FAN9611 12 400W Interleaved Dual BCM PFC Evaluation Board User Guide (FEB388)
Summary
This evaluation board supports interleaved dual Boundary-Conduction-Mode (BCM) Power-Factor Correction (PFC) supplies, utilizing FAN9611/FAN9612 controllers for high-power AC/DC applications. This comprehensive user guide is designed for electrical engineers and power electronics professionals, providing detailed technical specifications, circuit overviews, full testing procedures—including transient response and efficiency measurements—and component lists. It serves as an essential resource for designing and validating robust, highly regulated PFC solutions that meet stringent industry standards.
Page 1 Text Content
www.fairchildsemi.com
FEB388_003
FAN9611/FAN9612 400W Interleaved Dual BCM PFC Controller
Evaluation Board User Guide
Featured Fairchild Product: FAN9611, FAN9612
Please contact a local Fairchild Sales representative
for an evaluation board.
© 2010 Fairchild Semiconductor Corporation 1 FEB388_FAN9611/12 • Rev. 0.0.3
Page Summary Contents For FAIRCHILD FAN9611 12 400W Interleaved Dual BCM PFC Evaluation Board User Guide (FEB388)
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www.fairchildsemi.com FEB388_003 FAN9611/FAN9612 400W Interleaved Dual BCM PFC Controller Evaluation Board User Guide Featured Fairchild Product: FAN9611, FAN9612 Please contact a local Fairchild Sale...
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www.fairchildsemi.com Table of Contents 1. Overview of the Evaluation Board ........................................................................................... 3 2. Key Features ..............
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www.fairchildsemi.com The following user guide supports the FAN9611/12 400W evaluation board for interleaved boundary-conduction-mode power-factor-corrected supply. It should be used in conjunction wi...
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www.fairchildsemi.com 2. Key Features Low Total Harmonic Distortion, High Power Factor 180° Out-of-Phase Synchronization Automatic Phase Disable at Light Load 1.8A Sink, 1.0A Source, High-Curr...
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www.fairchildsemi.com 3. Specifications This board has been designed and optimized for the following conditions: Output Voltage Input Voltage Range Rated Output Power (Rated Current) VIN Nominal : 85~...
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www.fairchildsemi.com 4. Test Procedure Before testing the board; DC voltage supply for VDD, AC voltage supply for line input, and DC electric load for output should be connected to the board properly...
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www.fairchildsemi.com 5. Schematic Figure 2. FAN9611/12 400W Evaluation Board Schematic © 2010 Fairchild Semiconductor Corporation 7 FEB388_FAN9611/12 • Rev. 0.0.3
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www.fairchildsemi.com 6. Boost Inductor Specification PA2975NL-5P4 from Pulse Electronics (www.pulseelectronics.com) Core: PQ3230 (Ae=161mm2) Bobbin: PQ3230 Inductance : 200H Figure 3. Boost In...
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www.fairchildsemi.com 7. Line Filter Inductor Specifications A : 30mm (max) B: 15 mm (max) C: 11 mm D: 13 mm E: 15±1 mm Electrical Specifications (1k Hz, 1V) - Inductance: 9.0m H (min.) for each windi...
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www.fairchildsemi.com 8. PCB Layout Figure 5. First Layer (Top Side) Figure 6. Second Layer (Plane Layer) © 2010 Fairchild Semiconductor Corporation 10 FEB388_FAN9611/12 • Rev. 0.0.3
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www.fairchildsemi.com Figure 7. Third Layer (Ground Layer) Figure 8. Fourth Layer (Bottom Side) © 2010 Fairchild Semiconductor Corporation 11 FEB388_FAN9611/12 • Rev. 0.0.3
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www.fairchildsemi.com Figure 9. Top Solder Mask Figure 10. Bottom Solder Mask © 2010 Fairchild Semiconductor Corporation 12 FEB388_FAN9611/12 • Rev. 0.0.3
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www.fairchildsemi.com Figure 11. Top Silkscreen Figure 12. Bottom Silkscreen © 2010 Fairchild Semiconductor Corporation 13 FEB388_FAN9611/12 • Rev. 0.0.3
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www.fairchildsemi.com 9. Bill of Materials (BOM) Qty Reference Part Number Value Description Package Type Manufacturer 2 C1 C6 0.22µF CAP, SMD, CERAMIC, 25V, X7R 805 STD 1 C2 390n F CAP, SMD, CERAMIC,...
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www.fairchildsemi.com BOM (Continued) Qty Reference Part Number Value Description Package Type Manufacturer 2 R1-2 47kΩ RES, SMD, 1/8W 805 STD R3 R9 R27- 665kΩ RES, SMD, 1/8W 805 STD 28 R33-34 1 R4 33...
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www.fairchildsemi.com 10. Test Results 10.1. Startup Figure 13 and Figure 14 show the startup operation at 115VAC line voltage for no-load and full-load condition, respectively. Due to the closed-loop...
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www.fairchildsemi.com Figure 15 and Figure 16 show the startup operation at 230VAC line voltage for no-load and full-load conditions, respectively. Due to the closed-loop soft-start, almost no oversho...
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www.fairchildsemi.com 10.2. Normal Operation Figure 17 and Figure 18 show the two inductor currents and sum of two inductor currents at 115VAC line voltage and full-load conditions. The sum of the ind...
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www.fairchildsemi.com Figure 19 and Figure 20 show the two inductor currents and sum of two inductor currents at 230VAC line voltage and full-load conditions. The sum of the inductor currents has rela...
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www.fairchildsemi.com 10.3. Line Transient Figure 21 and Figure 22 show the line transient operation and minimal effect on output voltage due to the line feed-forward function. When the line voltage c...
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www.fairchildsemi.com 10.4. Load Transient Figure 23 and Figure 24 show the load-transient operation. When the output load changes from 100% to 0%, 26V (6.5% of nominal output voltage) voltage oversho...
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www.fairchildsemi.com 10.5. Brownout Protection Figure 25 and Figure 26 show the startup operation at slowly increasing line voltage. The power supply starts up when the line voltage reaches around 78...
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www.fairchildsemi.com Figure 27 and Figure 28 show the shutdown operation at slowly decreasing line voltage. The power shuts down when line voltage drops below 68VAC. Line Voltage Gate Drive 1 Line Cu...
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www.fairchildsemi.com 10.6. Phase Management Figure 29 and Figure 30 show the phase-shedding waveforms. As observed, when the gate drive signal of Channel 2 is disabled, the duty cycle of Channel 1 ga...
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www.fairchildsemi.com Figure 31 and Figure 32 show the phase-adding waveforms. As observed, just before the channel 2 gate drive signal is enabled, the duty cycle of Channel 1 gate drive signal is hal...
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www.fairchildsemi.com Figure 33 and Figure 34 show the sum of two-inductor current and line current for phase shedding and adding, respectively. The small line-current glitch during phase management e...
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www.fairchildsemi.com ffi ci en cy 10.7. Efficiency Figure 35 through Figure 38 show the measured efficiency of the 400W evaluation board with and without phase management at input voltages of 115VAC ...
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www.fairchildsemi.com 10.8. Harmonic Distortion and Power Factor Figure 39 and Figure 40 compare the measured harmonic current with EN61000 class D and C, respectively, at input voltages of 115VAC and...
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www.fairchildsemi.com Figure 41 shows the measured power factors at input voltage of 115VAC and 230VAC. As observed, high power factor above 0.98 is obtained from 100% to 50% load. Table 4 shows the t...
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www.fairchildsemi.com 11. References Datasheet: FAN9611 / FAN9612 – Interleaved Dual BCM PFC Controllers AN-6086 – “Design Consideration for interleaved Boundary Conduction Mode (BCM) PFC Using FAN961...
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 30 |
| File Size | 5.07 MB |
| Published | May 31, 2026 |
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Frequently Asked Questions
Can the board be used with either FAN9611 or FAN9612 controllers?
Yes, although marked as FAN9612, it can interchangeably evaluate both the 10V turn-on threshold FAN9611 and the 12.5V turn-on threshold controller.
What is the maximum power level achievable with this interleaved structure compared to simpler techniques?
The interleaving extends the practical power level from about 300W to greater than 800W.
How does Boundary-Conduction-Mode (BCM) PFC benefit efficiency?
BCM offers inherent zero-current switching of the boost diodes, eliminating reverse-recovery losses and allowing cheaper diodes.
What type of power applications is this board suitable for?
It meets regulations for Class D (TV/AC PC power) and Class C (lighting applications).
Where can I find more detailed information or purchase the evaluation board components?
Visit Fairchild’s website at www.fairchildsemi.com, or contact a local Fairchild Sales representative.