DESCRIPTION
RS2542 is a highly integrated current mode PWM controller. It built in patent 700V High voltage startup, optimized for high performance, exhibit extra low standby power consumption (<50mW) and costs effective offline flyback converter applications.
PWM switching frequency at normal operation is internally fixed. At no load or light load condition, it operates in burst mode to minimize switching loss. Less than 50mW standby power consumption and very high conversion efficiency is thus achieved. Patent high voltage startup is implemented in RS2542, which features with short startup time and extra low standby current.

FEATURES
• Built-in 700V high voltage startup
• Patent high voltage startup technique
• Extra low standby (<50mW)
• Power on soft startup
• Frequency spreading to minimize EMI
• Audio noise free operation
• Fixed 65KHz switching frequency
• Brownout function
• Comprehensive protection
   - VDD under voltage lockout with hysteresis
      (UVLO)
   - Cycle-by-cycle over current protection (OCP)
   - Overload protection (OLP) with Auto-recovery
   - Over temperature protection (OTP) with
      auto-recovery
   - VDD over voltage protection (OVP) with
      auto-recovery

APPLICATIONS
• Offline AC/DC flyback converter for
   - AC/DC adapter
   - PDA power supplies
   - Auxiliary power supply for pc and server
   - Open-frame SMPS