UCC3817DW ,BiCMOS Power Factor PreregulatorFeatures... 1 8 Application and Implementation...... 158.1 Application Information........ 152 Appl ..
UCC3817N ,BiCMOS Power Factor PreregulatorPin Functions (continued)PINI/O DESCRIPTIONNAME NO.Voltage amplifier inverting input. This is norma ..
UCC3818AD ,BiCMOS Power Factor PreregulatorMaximum Ratings.. 513.1 Documentation Support.... 268.2 ESD Ratings........ 513.2 Related Links.. 2 ..
UCC3818ADRG4 ,BiCMOS Power Factor Preregulator 16-SOIC 0 to 70Block Diagram..... 9Information..... 279.3 Feature Description...... 94 RevisionNOTE: Page numbers ..
UCC3818AN ,BiCMOS Power Factor PreregulatorElectrical Characteristics....... 613.5 Trademarks..... 268.6 Typical Characteristics. 813.6 Electr ..
UCC3818D ,BiCMOS Power Factor PreregulatorPin Functions (continued)PINI/O DESCRIPTIONNAME NO.Voltage amplifier inverting input. This is norma ..
UPA621TT ,N-CHANNEL MOS FIELD EFFECT TRANSISTOR FOR SWITCHINGFEATURES• 2.5 V drive available• Low on-state resistance0.65 0.65SRDS(on)1 = 50 mΩ MAX. (VGS = 4.5 ..
UPA621TT-E1 ,N-channel enhancement type MOS FETFEATURES• 2.5 V drive available• Low on-state resistance0.65 0.65SRDS(on)1 = 50 mΩ MAX. (VGS = 4.5 ..
UPA650TT-E1 ,P-channel enhancement type MOS FETFEATURES 2 3• 1.8 V drive available• Low on-state resistance0.65 0.65SRDS(on)1 = 50 mΩ MAX. (VGS = ..
UPA651TT-E1 ,P-channel enhancement type MOS FETFEATURES 2 3• 1.8 V drive available• Low on-state resistance0.65 0.65SRDS(on)1 = 69 mΩ MAX. (VGS = ..
UPA652TT-E1 ,P-channel enhancement type MOS FETDATA SHEETMOS FIELD EFFECT TRANSISTORµµµµ PA652TTP-CHANNEL MOS FIELD EFFECT TRANSISTORFOR SWITCHIN ..
UPA653TT-E1 ,P-channel enhancement type MOS FETDATA SHEETMOS FIELD EFFECT TRANSISTORµµµµ PA653TTP-CHANNEL MOS FIELD EFFECT TRANSISTORFOR SWITCHIN ..
UCC3817D-UCC3817DTR-UCC3817DW-UCC3817N
BiCMOS Power Factor Preregulator
VREF9
DRVOUT
GND
VCC
OVP/EN
VAOUT
1.9 V
7.5 V REFERENCE
UVLO
16 V/10 V (UCC2817)
10.5 V/10 V (UCC2818)
VCC Q
PWM
LATCH PWM
8.0 V
ENABLE
OVP
MULT
CLK
CURRENT
AMP
16 V (FOR UCC2817 ONLY)0.33 V
ZERO POWER
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UCC2817,SLUS395K–FEBRUARY
UCC2817, UCC2818, UCC3817 and UCC3818 BiCMOS Power Features Controls Boost Preregulatorto 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 Upto 18-V Operation Frequency Range6 kHzto 220 kHz
Applications PC Power Consumer Electronics Lighting Industrial Power Supplies IEC6100-3-2 Compliant Supplies Less Than
300W
DescriptionThe UCCx817 and UCCx818
functions necessary for active power factor-corrected
preregulators. The controller achieves near-unity
power factor by shaping the AC input line current
waveformto correspondto thatof the AC input line
voltage. Average current mode control maintains
stable, low distortion sinusoidal line current.
Designedin Texas Instrument’s BiCMOS process,
the UCCx817 and UCCx818 lower start-up current,
overvoltage protection, leading-edge modulation
currentin the bulk capacitor,
offset (±2-mV) current
light load conditions.
Device(1) Forall available packages,
the endofthe data sheet.
Block Diagram
