UCC1858 Unitrode Semiconductor, UCC1858 Datasheet - Page 5

• Manufacturer Part Number: UCC1858
• Description: High Efficiency, High Power Factor Preregulator
• Manufacturer: Unitrode Semiconductor

APPLICATION INFORMATION (cont.)
* Pins 4, 9 and 14 need good bypassing to GND for noise immunity. Capacitors C2, C3 and C23 should each consist
of a combination of ceramic (0.47 F) and tantalum (4.7 F) capacitors for best results.
* * L1 can be fabricated with an Allied Signal Amorphous Core MP4510PFC, using a 100 turn (AWG 18) primary and
5 turn secondary.
Figure 1. UCC3858 Typical Application Circuit
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UCC1858
UCC2858
UCC3858
UDG-97120