Product details

Topology Boost Control mode CCM Practical operating frequency (Max) (MHz) 0.25 UVLO thresholds on/off (V) 10.5/10 Device type Controllers Operating supply current (mA) 4 Features < 150W Applications, > 750W Applications, Average Current Mode, Continuous Control Mode , Enable, OVP Rating Catalog Operating temperature range (C) 0 to 70
Topology Boost Control mode CCM Practical operating frequency (Max) (MHz) 0.25 UVLO thresholds on/off (V) 10.5/10 Device type Controllers Operating supply current (mA) 4 Features < 150W Applications, > 750W Applications, Average Current Mode, Continuous Control Mode , Enable, OVP Rating Catalog Operating temperature range (C) 0 to 70
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
  • 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
  • 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

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.

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

Design & development

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

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