BiCMOS Power Factor Preregulator - UCC3818

UCC3818 (ACTIVE)

BiCMOS Power Factor Preregulator

 

Description

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.

Features

  • 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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Parametrics Compare all products in Power Factor Correction

 
Device Type
Control Method
UVLO Thresholds On/Off (V)
Operating Supply (Max) (V)
Operating Supply Current (mA)
Pin/Package
Operating Temperature Range (C)
Rating
Features
UCC3818 UCC2818
Single-phase PFC    Single-phase PFC   
CCM    CCM   
10.5/10    10.5/10   
18    18   
4    4   
16PDIP
16SOIC
16SOIC
16TSSOP   
16PDIP
16SOIC
16SOIC
16TSSOP   
0 to 70    -40 to 85   
Catalog    Catalog   
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Average Current Mode
Enable
OVP   
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Average Current Mode
Enable
OVP   

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