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UCC2817

Texas Instruments
Part Number UCC2817
Manufacturer Texas Instruments
Description BiCMOS Power Factor Pregulator
Published Apr 3, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC2817, UCC2818, UCC3817, UCC...
Datasheet PDF File UCC2817 PDF File

UCC2817
UCC2817

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC2817, UCC2818, UCC3817, UCC3818 SLUS395K – FEBRUARY 2000 – REVISED OCTOBER 2015 UCC2817, UCC2818, UCC3817 and UCC3818 BiCMOS Power Factor Pregulator 1 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 BiCMOS Operation • Up to 18-V Operation • Frequency Range 6 kHz to 220 kHz 2 Applications • PC Power • Consumer Electronics • Lighting • Industrial Power Supplies • IEC6100-3-2 Compliant 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 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, lowoffset (±2-mV) current amplifier to reduce distortion at light load conditions.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) UCC2817, UCC2818, UCC3817, UCC3818 SOIC (16) PDIP (16) 3.
91 mm × 9.
9 mm 7.
5 mm × 10.
3 mm 6.
35 mm × 19.
3 mm (1) For all available packages, see the orderable addendum at the end of the data sheet.
Block Diagram VCC 15 OVP/EN 10 16 V (FOR UCC2817 ONLY) 7.
5 V REFERENCE 9 VREF SS 13 VAOUT 7 VSENSE 11 7.
5 V VOLTAGE t ERROR AMP + VFF 8 IAC 6 MOUT 5 X2 MIRROR 2:1 X y MULT X 1...


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