UCC3818
Features
- 1 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 Bi CMOS Operation
- Up to 18-V Operation
- Frequency Range 6 k Hz to 220 k Hz
2 Applications
- PC Power
- Consumer Electronics
- Lighting
- Industrial Power Supplies
- IEC6100-3-2 pliant Supplies Less Than
300 W
3 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 Bi CMOS process, the UCCx817 and UCCx818 offers new...
