6kHz-220kHz CCM PFC controller with 10.5V/10V UVLO, 0°C to 70°C


Product details


Device type Single-phase PFC Control method CCM Operating supply (Max) (V) 18 Operating supply current (mA) 4 UVLO thresholds on/off (V) 10.5/10 Features < 150W Applications, > 750W Applications, Average Current Mode, Enable, OVP Rating Catalog Operating temperature range (C) 0 to 70 open-in-new Find other Power factor correction (PFC) controllers

Package | Pins | Size

PDIP (N) 16 181 mm² 19.3 x 9.4 SOIC (D) 16 59 mm² 9.9 x 6 SOIC (DW) 16 77 mm² 10.3 x 7.5 TSSOP (PW) 16 22 mm² 5 x 4.4 open-in-new Find other Power factor correction (PFC) controllers


  • Controls Boost Preregulator to Near-Unity Power Factor
  • Limits Line Distortion
  • World Wide Line Operation
  • Over-Voltage Protection
  • Accurate Power Limiting
  • Average Current Mode Control
  • Improved Noise Immunity
  • Improved Feed-Forward Line Regulation
  • Leading Edge Modulation
  • 150-µA Typical Start-Up Current
  • Low-Power BiCMOS Operation
  • Up to 18-V Operation
  • Frequency Range 6 kHz to 220 kHz
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The UCCx817 and UCCx818 family provides all the functions necessary for active power factor-corrected preregulators. The controller achieves near-unity power factor by shaping the AC input line current waveform to correspond to that of the AC input line voltage. Average current mode control maintains stable, low distortion sinusoidal line current.

Designed in Texas Instrument’s BiCMOS process, the UCCx817 and UCCx818 offers new features such as lower start-up current, lower power dissipation, overvoltage protection, a shunt UVLO detect circuitry, a leading-edge modulation technique to reduce ripple current in the bulk capacitor, and an improved, low-offset (±2-mV) current amplifier to reduce distortion at light load conditions.

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Technical documentation

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Type Title Date
* Datasheet UCC2817, UCC2818, UCC3817 and UCC3818 BiCMOS Power Factor Pregulator datasheet (Rev. K) Oct. 01, 2016
User guides UCC3817 BiCMOS Power Factor Preregulator Evaluation Board (Rev. D) Nov. 13, 2014
Application notes Avoiding Audible Noise at Light Loads When Using Leading Edge Triggered PFC Con (Rev. C) Apr. 13, 2011
Application notes Startup Current transient of the Leading Edge Triggered PFC Controllers Jun. 30, 2004
Application notes UCC3817 Current Sense Transformer Evaluation Feb. 13, 2004
Application notes PFC Family Differences UCC3817A/18A/19A and UCC3817/18/19 Aug. 18, 2003
Application notes AC Requirements for Power Factor Correction Circuits Mar. 28, 2002
Application notes Accurate PWM Duty Cycle Clamp Jan. 25, 2002
Application notes DN-66 UC3854A/B and UC3855A/B Provide Power Limiting with Sinusoidal Input (Rev. A) Nov. 06, 2001
Application notes Synchronizing a PFC Controller from a Down Stream Controller Gate Drive Nov. 03, 2000

Design & development

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Design tools & simulation

SLUC092A.ZIP (154 KB)

CAD/CAE symbols

Package Pins Download
PDIP (N) 16 View options
SOIC (D) 16 View options
SOIC (DW) 16 View options
TSSOP (PW) 16 View options

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