PR9853

PR9853 Low Cost Green-Power PWM Controller With Low EMI Technique Features l Low Cost, PWM&PFM&hiccup mode l Low Start-up Current (about 3μA) l Low Operating Current (about 1.2mA) l Current Mode Operation l VDD Under Voltage Lockout (UVLO) l Built-in Synchronized Slope Compensation l Built-in Low EMI Technique l Programmable PWM Frequency l Audio Noise Free Operation l Leading edge Blanking on SEN input l Constant output power limiting in universal AC input Range l SOT-23-6L and DIP-8 Pb-Free Packaging l Good Protection Coverage With Auto Self-Recovery Complete Protection with Ø Soft Clamped GATE output voltage 18.0V Ø VDD over voltage Clamp 34.0V Ø Cycle-by-cycle current limiting Ø Output SCP (Short circuit Protection) Ø Output OLP (Over Load Protection) Ø High-Voltage CMOS Process with ESD Applications l Switching AC/DC Adapter l Battery Charger l Open Frame Switching Power Supply l Standby Power Supplies l Set-Top Box Power Supplies l 384X Replacement General Description PR9853 is a highly integrated and low cost current mode PWM controller, which is ideal for low power current mode of offline AC-DC fly-back converter applications. By adjusting the external resistors to change the operating frequency, and then IC automatically enters PFM or hiccup mode in light-load or zero-load condition. Thereby reduce the standby power loss and achieve power-stored function. Because of the very low start-up current, a large value start-up resistor can be used in PR9853. Built-in sy...