DESCRIPTION
The RS2052 is a highly integrated low cost current mode PWM controller, which is ideal for small power current mode of offline AC-DC fly-back converter applications. Making use of external resistors, the IC changes the operating frequency and automatically enters the PFM/CRM (Cycle Reset Mode) under light-load/zero-load conditions. This can minimize standby power consumption and achieve power-saving functions. With a very low start-up current, the RS2052 could use a large value start-up resistor (2MΩ).

FEATURES
• Low standby power（ <0.1W）
• Low startup current (about 5μA)
• Low operating current (about 1.5mA)
• Power on Soft Start Reducing Power MOSFET
   Vds Stress
• Adjustable OTP
• Over Voltage (fixed or adjustable) Protection
   (OVP)
• OLP, OVP and OTP coverage with autorecovery
• PWM&PFM&CRM Current Control Mode
• Built-in Synchronized Slope Compensation
• Frequency shuffling for Excellent EMI
   Performance
• Fixed 65KHz Switching Frequency
• Audio Noise Free Operation
• Leading edge Blanking on Sense input
• Constant output power limiting for universal AC
   input Range
• Soft Clamped GATE output voltage 12.0V
• Good Protection Coverage With Under Voltage
   Lockout (UVLO)/Cycle-by-cycle current
   limiting/Power On Soft Start/OTP/SCP/OLP
• SOT-23-6L, DIP-8L Package
• 3000V HBM ESD

APPLICATIONS
• Switching AC/DC Adaptor
• Open Frame Switching Power Supply
• Standby Power Supplies
• Set-Top Box Power Supplies