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FAN9611: Power Factor Controller (PFC), Interleaved Dual CrCM

Datasheet: FAN9611-D.pdf
Rev. A (1700kB)
Product Overview
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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.
Features
 
  • Sync-Lock™ Interleaving Technology for 180° Out-of-Phase Synchronization Under All Conditions
  • Automatic Phase Disable at Light Load
  • Dead-Phase Detect Protection
  • 2.0 A Sink, 1.0 A 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 80 µA Typical
  • Works with DC and 50 Hz to 400 Hz AC Inputs
Applications
  • AC-DC Merchant Power Supply
  • LCD TV
  • PDP TV
  • Desktop PC
Availability & Samples
Specifications
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
FAN9611MX Active
Pb-free
FAN9611 SOIC-16 751BG 1 260 Tape and Reel 2500 $0.8266
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
PFC Mode
Frequency Operation
Control Mode
Topology
fSW Typ (kHz)
VCC Max (V)
Drive Cap. (mA)
UVLO (V)
Latch
UVP
Inhibition
Package Type
FAN9611MX  
 $0.8266 
Pb
 Active   
CrCM/BCM
Variable
Voltage Mode
Step-Up
Variable
20
1000 / 2000
10
Yes
Yes
No
SOIC-16
Case Outlines
751BG   
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