Calculation tool
Data sheet
UCC3818
- 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.
Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC2817, UCC2818, UCC3817 and UCC3818 BiCMOS Power Factor Pregulator datasheet (Rev. K) | PDF | HTML | 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
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (N) | 16 | Ultra Librarian |
| SOIC (D) | 16 | Ultra Librarian |
| SOIC (DW) | 16 | Ultra Librarian |
| TSSOP (PW) | 16 | Ultra Librarian |
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