DESCRIPTION
MP156 is a primary-side regulator that provides accurate constant voltage (CV) regulation without opto-coupler, support Buck, Buck-Boost, Boost and Flyback topologies. It has an integrated 500V MOSFET to simplify the structure and reduce costs. These features make it a competitive candidate for off-line low power applications, such as home appliances and standby power.

FEATURES
• Primary-side constant voltage (CV) control, supporting Buck, Buck-Boost, Boost and Flyback topologies
• Integrated 500V/20Ω MOSFET
• <30mW no-load power consumption
• Up to 4W output power
• Maximum DCM output current less than 130mA
• Maximum CCM output current less than 220mA
• Low VCC Operating Current
• Frequency foldback
• Limited maximum frequency
• Peak-current compression
• Internal high-voltage current source
• Internal 350ns leading-edge blanking
• Thermal shutdown (auto restart)
• VCC under voltage lockout with hysteresis
• Timer based over-load protection.
• Short-circuit protection
• Open-loop protection

APPLICATIONS
• Home appliances, white goods and consumer electronics
• Industrial controls
• Standby power