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Details
| Topologie | Leistungsfaktor-Korrektur |
| Eingangsspannung | 90-265 V |
| Schaltfrequenz | 16.5-525 kHz |
| Ausgang 1 | 400 V / 1 A |
| IC-Revision | 1.1.7 |
Beschreibung
The FAN9611 interleaved dual Boundary-Conduction-Mode (BCM) Power-Factor-Correction (PFC) controller operates two parallel-connected boost power trains 180° out of phase. Interleaving extends the maximum practical power level of the control technique from about 300 W to greater than 800 W. Unlike the continuous conduction mode (CCM) technique often used at higher power levels, BCM offers inherent zero-current switching of the boost diodes, which permits the use of less expensive diodes without sacrificing efficiency. Furthermore, the input and output filters can be smaller due to ripple current cancellation and effective doubling of the switching frequency.
The converters operate with variable frequency, which is a function of the load and the instantaneous input / output voltages. The switching frequency is limited between 16.5 kHz and 525 kHz. The Pulse Width Modulators (PWM) implement voltage-mode control with input voltage feedforward. When configured for PFC applications, the slow voltage regulation loop results in constant on-time operation within a line cycle. This PWM method, combined with the BCM operation of the boost converters, provides automatic power factor correction.
The controller offer bias UVLO of 10 V / 7.5 V, input brownout, over-current, open-feedback, output over-voltage, and redundant latching over-voltage protections. Furthermore, the converters’ output power is limited independently of the input RMS voltage. Synchronization between the power stages is maintained under all operating conditions.
Eigenschaften
- Sync-Lock™ Interleaving Technology for 180° Out-of-Phase Synchronization Under All Conditions
- Automatic Phase Disable at Light Load
- Dead-Phase Detect Protection2.0A Sink, 1.0A Source, High-Current Gate Drivers
- High Power Factor, Low Total Harmonic Distortion
- Voltage-Mode Control with (VIN)2 Feedforward
- Closed-Loop Soft-Start with User-Programmable Soft-Start Time for Reduced Overshoot
- Minimum Restart Frequency to Avoid Audible Noise
- Maximum Switching Frequency Clamp
- Brownout Protection with Soft Recovery
- Non-Latching OVP on FB Pin and Latching Second-Level Protection on OVP Pin
- Open-Feedback Protection
- Power-Limit and Current
- Protection for Each Phase
- Low Startup Current of 80µA Typical
- Works with DC and 50Hz to 400Hz AC Inputs
Remarks:L1,L2=280uH L3,L4=9mH UsedRefer page no.7
L1,L2=200uH And L3,L4 UsedRefer page no.7
Typische Anwendungen
- Large Screen LCD-TV,PDP-TV,RP-TV Power
- Networking and Televom Power Supplies
- High-Effciency Desktop and Server Power Supplier
- Solar Micro Inverters
- 100-1000W AC-DC Power Supplies
Weiterführende Informationen
Artikeldaten
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