UCC3818DTR ,BiCMOS Power Factor Preregulatorfeatures such• Improved Noise Immunityas lower start-up current, lower power dissipation,• Improved ..
UCC3818DTRG4 ,BiCMOS Power Factor PreregulatorPin Functions (continued)PINI/O DESCRIPTIONNAME NO.Voltage amplifier inverting input. This is norma ..
UCC3818DW ,BiCMOS Power Factor PreregulatorBlock DiagramVCC15OVP/EN 1016 V (FOR UCC2817 ONLY)7.5 V REFERENCE 9 VREFSS 13UVLO1.9 V t ENABLEVAOU ..
UCC3818DW ,BiCMOS Power Factor PreregulatorFeatures 3 DescriptionThe UCCx817 and UCCx818 family provides all the1• Controls Boost Preregulator ..
UCC3818DW ,BiCMOS Power Factor PreregulatorFeatures 3 DescriptionThe UCCx817 and UCCx818 family provides all the1• Controls Boost Preregulator ..
UCC3818DW ,BiCMOS Power Factor PreregulatorElectrical Characteristics....... 511.3 Receiving Notification of Documentation Updates 286.6 Typic ..
UPA672 ,N-CHANNEL MOS FET ARRAY FOR SWITCHINGDATA SHEETMOS FIELD EFFECT TRANSISTORμPA672TN-CHANNEL MOS FET ARRAYFOR SWITCHING The μPA672T i ..
UPA672T ,N-CHANNEL MOS FET ARRAY FOR SWITCHINGDATA SHEETMOS FIELD EFFECT TRANSISTORμPA672TN-CHANNEL MOS FET ARRAYFOR SWITCHING The μPA672T i ..
UPA675T ,N-channel enhancement type MOS FETFEATURES1 2 3• Two MOS FET circuits in package the same size as SC-70• Automatic mounting supported ..
UPA675T-T1 ,N-channel enhancement type MOS FETELECTRICAL CHARACTERISTICS (TA = 25°C)CHARACTERISTICS SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNITZer ..
UPA679TB ,N/P-Channel enhancement MOS FET for load swDATA SHEETMOS FIELD EFFECT TRANSISTORµµµµ PA679TBN/P-CHANNEL MOS FIELD EFFECT TRANSISTORFOR SWITCH ..
UPA80 ,Silicon transistor arrayTRANSISTOR ARRAY
““““““ ~ = ‘ ‘ 1 M ’0
FLUORESCENT INDICATOR PANEL DRIVER
PNP-NPN SILICON EP ..
UCC3818D-UCC3818DTR-UCC3818DTRG4-UCC3818DW-UCC3818DWTR-UCC3818N-UCC3818NG4-UCC3818PW-UCC3818PWTR
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
