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 ..
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 ..
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 ..
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 ..
UCC3818AD-UCC3818ADRG4-UCC3818AN
BiCMOS Power Factor Preregulator
VREF
DRVOUT
GND
VCC
OVP/EN
VAOUT
1.9 V
PKLMT
7.5 V
REFERENCE
UVLO
16 V/10 V (UCC3817A)
10.5 V/10 V (UCC3818A)
VCC
OSCILLATOR Q
PWM
LATCH PWM
VOLTAGE
ERROR AMP
8.0 VVSENSE
ENABLE
OVP
MULT
CURRENT
AMP
16 V (FOR UCC3817A ONLY)0.33 V
ZERO POWER
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UCC2817A, UCC2818A, UCC3817A, UCC3818ASLUS577D –NOVEMBER 2011–REVISED AUGUST
UCCx81xA BiCMOS Power Factor Preregulator Features Controls Boost Preregulatorto 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-Vto 17-V Operation Frequency Rangeof6 kHzto 220 kHz
Applications PC Power Consumer Electronics Lighting Industrial Power Supplies IEC6100-3-2 Compliant Supplies Less Than
300W
Description the UCC3818A family provides for active power The controller achieves shaping theac input lineto thatof the ac input mode control maintains line current. BiCMOS process, the offers new features such as lower power dissipation,
overvoltage protection,a shunt UVLO detect circuitry, leading-edge modulation techniqueto reduce ripple
currentin the bulk capacitor and an improved, low-
offset (±2 mV) current amplifierto reduce distortionat
light load conditions.
Block Diagram
