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UC2852 Scheda tecnica(PDF) 5 Page - Texas Instruments

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Il numero della parte UC2852
Spiegazioni elettronici  High Power-Factor Preregulator
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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UC2852 Scheda tecnica(HTML) 5 Page - Texas Instruments

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UNITRODE INTEGRATED CIRCUITS
7 CONTINENTAL BLVD.
• MERRIMACK, NH 03054
TEL. (603) 424-2410
• FAX (603) 424-3460
APPLICATION INFORMATION: A 100 Watt Power Factor Preregulator
This circuit demonstrates a complete power factor preregulator based on the UC3852. This preregulatorwill supply
up to 100 watts at 400VDC and exhibit power factor greater than 0.995 with less than 10% total harmonic distortion.
Operating input range is 90V to 160V RMS at 50Hz to 60Hz.
This design is intentionally simple, yet fully functional. The UC3852 can also be used in designs featuring soft start,
over-voltage protection, wide power-line voltage operation, and fault latching. For more information on applying
the UC3852, refer to Unitrode Application Note U–132.
PARTS LIST
UC1852
UC2852
UC3852
UDG-92004
C1
0.47
µF/250VAC X2 Class Polyester
C2
1nF/16V Ceramic
C3
68
µF/35V Aluminum Electrolytic
C4
180pF/16V Ceramic
C5
0.1
µF/16V Polyester or Ceramic
C6
82
µF/450V Aluminum Electrolytic
D1
2A/500V Bridge Rectifier (Collmer
KBPC106 or Powertex MB11A02V60)
D2
100mA/50V Switching Diode (1N4148)
D3
2A/500V 250ns Recovery-Time Rectifier
(Motorola MR856)
IC1
UC3852N Power Factor Controller IC
Q1
IRF830 4.5A/500V 1.5
Ω Power FET
L1
680
µH (Renco RL3792 with
10 Turn 24 AWG Secondary)
R1
150k
Ω, 14W
R2
0.2
Ω, 12W Carbon Composition
R3
10
Ω, 14W
R4
13.3k
Ω, 14W
R5
1M
Ω, 14W
R6
20k
Ω, 14W
R7
200k
Ω, 12W
R8
200k
Ω, 12W
5


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