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TI UCC2818ADR product image
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TI UCC2818ADRRoHS

Manufacturer
TI
MPN
UCC2818ADR
LCSC Part #
C2870031
Packaging
SOIC-16
Customer #
Key Attributes
BiCMOS Power Factor Preregulator
Datasheetpdf iconTI UCC2818ADR

Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/PFC (Power Factor Correction)
ManufacturerTI
PackagingSOIC-16
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging2500
Sales UnitPiece

Introduction

AI Translation

The UCC3817A and the UCC3818A 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 UCC3817A/UCC3818A 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, lowoffset (±2mV) current amplifier to reduce distortion at light load conditions.

The UCC3817A/18A family of PFC Controllers is directly pin for pin compatible with the UCC3817/18 family of devices. Only the output stage of UCC3817A family has been modified to allow use of a smaller external gate drive resistor values. For some power supply designs where an adequately high enough gate drive resistor can not be used, the UCC3817A/18A family offers a more robust output stage at the cost of increasing the internal gate resistances. The gate drive of the UC3817A/18A family however remains strong at ±1.2 A of peak current capability.

UCC3817A offers an on-chip shunt regulator with low start-up current, suitable for applications utilizing a bootstrap supply. UCC3818A is intended for applications with a fixed supply (VCC). Both devices are available in the 16-pin D, N and PW packages.

Features

AI Translation
  • Controls Boost Preregulator to Near-Unity Power Factor
  • Limits Line Distortion
  • World Wide Line Operation
  • Overvoltage 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
  • 12-V to 17-V Operation
  • Frequency Range of 6 kHz to 220 kHz

Applications

AI Translation
  • PC Power
  • Consumer Electronics
  • Lighting
  • Industrial Power Supplies
  • IEC6100-3-2 Compliant Supplies Less Than 300 W
In-Stock: 2,178
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Add to BOM List
QtyUnit PriceTotal Amount
1+$ 2.1013$ 2.10
10+$ 1.9378$ 19.38
30+$ 1.8369$ 55.11
100+$ 1.7327$ 173.27
500+$ 1.6846$ 842.30
1,000+$ 1.6638$ 1663.80
Standard Packaging2500/Full Reel
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