SC2001

Микросхема SC2001

SC2001 - IC for power factor correction (patch ICE2PCS02), SOP-8

 

Features and Benefits

• Continuous conduction mode (CCM) system: low peak current and suitability for high power applications
• Average current control system: no multiplier and few external components allows simple circuit configuration because no input voltage detection required
• PWM and frequency modulation functions: PWM operation frequency fixed at 65 kHz (typ) with superimposed variable frequency according to duty cycle
• Maximum duty cycle 94% (typ)
• Error amplifier reference voltage 3.5 V (typ)
• Built-in high speed load response (HSR) function
• Brown-in/brown-out protection function: protects the power supply at low input voltages
• Protection functions:
• Output overvoltage protection (OVP): turns off gate output on pulse-by-pulse basis, with auto restart
• Overcurrent protection (OCP): two types, both with auto restart:
• – VIS(OCPL) : limits power by reducing duty cycle of next cycle after detection
• – VIS(OCPH) : turns off gate output on pulse-by-pulse basis
• Open loop detection (OLD) on output: stops oscillation, and the operation switches to standby mode; auto restart after removal of cause of open loop

 

 

Применение:

• Power factor correction of middle to high power for electronic devices such as:
• AC/DC power supplies
• Digital appliances for large size LCD/PDP television and so forth
• Office automation (OA) equipment for computer, server, monitor, and so forth
• Communication facilities