Features:

• -The STK73903 is a self-excitation type feedback control off-line switching regulator IC
• -It incorporates all the power switching, amplifier, overcurrent protection, and driver circuits required in a switching regulator
• -It can be used in the design of switching power supplies with minimal number of external components
• -Adoption of MOSFET power switching elements supports higher oscillator frequency
• -Allows for the use of smaller pulse transformers and capacitors, making it possible to construct miniature power supply systems
• -Applications include CRT/CTV power supplies and office automation equipment power supplies
• -Features include feedback control for high output voltage precision, driver circuit on-chip, and overcurrent protection circuit on-chip
• -Pin compatible with other devices in the same series with 110 to 280W power ratings
• -IMST substrate acts as an electromagnetic shield, making low-noise designs possible
• -Max ratings: Operating substrate temperature (Tc max) 115C, AC input voltage (VAC) 140 Vrms, Operating temperature (Topr) -10 to 85C,
• Maximum output Power (Wo max) 180W
• -TR1: Drain Current (ID) 10A, Pulse drain current (ID pulse) 35A, Drain reverse current (IDR) 10A, Gate-Source voltage (VGSS) /- 30V, Chip junction temperature (Tj max) 150C
• -ZD1: Allowable power dissipation (PZD1) 500mW, Chip junction temperature (Tj(ZD1)max) 125C