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UCC3818A

Texas Instruments
Part Number UCC3818A
Manufacturer Texas Instruments
Description BiCMOS Power Factor Preregulator
Published Apr 25, 2020
Detailed Description Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC2817A, UCC2818A, UCC3817A, ...
Datasheet PDF File UCC3818A PDF File

UCC3818A
UCC3818A

Overview
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC2817A, UCC2818A, UCC3817A, UCC3818A SLUS577D – NOVEMBER 2011 – REVISED AUGUST 2016 UCCx81xA BiCMOS Power Factor Preregulator 1 Features •1 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 2 Applications • PC Power • Consumer Electronics • Lighting • Industrial Power Supplies • IEC6100-3-2 Compliant Supplies Less Than 300 W 3 Description 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 (±2 mV) current amplifier to reduce distortion at light load conditions.
Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SOIC (16) 4.
90 mm × 3.
91 mm UCCx81xA PDIP (16) 19.
30 mm × 6.
35 mm TSSOP (16) 5.
00 mm × 4.
40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet.
OVP/EN 10 SS 13 VAOUT 7 VSENSE 11 7.
5 V VOLTAGE í ERROR AMP + VFF 8 X2 X ÷ MULT X MIRROR 2:1 IAC 6 MOUT 5 Block Diagram VCC 15 16 V (FOR UCC3817A ONLY) 7.
5 V REFERENCE 9 VREF 1.
9 V í + 0.
33 V CU...


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