STK73902

Thick Film Hybrid IC www.DataSheet4U.com INCHANGE STK73902 Self-excitation Type Feedback Control Switching Regulator ‹ Features ©q ©q © q © q © q ©q Power MOSFET devices Feedback control for high output voltage precision Driver circuit on-chip Overcurrent protection circuit on-chip Pin compatible with all other devices in the same series of devices with 110 to 280W power ratings Higher oscillator frequency allows the use of smaller pulse transformers Package Dimensions unit:mm ‹ Applications ©q CRT/CTV power supplies © Office automation equipment power supplies q ‹ Block Diagram Pin Functions (1) (2) (3) (4) (5) (6) Amplifier circuit control Ground TR1 gate Drive voltage input Starting voltage input OCP setting level input (7) OCP input-voltage dependency detection input (8) TR1 source (9) TR1 source (11) TR1 drain (12) TR1 drain Thick Film Hybrid IC www.DataSheet4U.com INCHANGE Specifications ‹ Maximum Ratings at Ta=25¡æ Parameter Operating substrate temperature AC input voltage Operating temperature Storage temperature Maximum output power (TR1) Drain current Pulse drain current Drain reverse current Gate-source voltage Allowable power dissipation Chip junction temperature (ZD1) Allowable power dissipation Chip junction temperature PZD1 Tj(ZD1)max 500 125 mW ¡æ , Tc=25¡æ unless otherwise specified Conditions Ratings 115 140 -10 to+85 -30 to+115 ¡æ W UNIT ¡æ Vrms ¡æ Symbol TC max VAC Topr Tstg Wo max Recommended value is 105¡æ Specified test circuit Specifie...