MCU
     CMOS LDO Linear Regulator
     Dual LDO Linear Regulator
     Bipolar LDO Linear Regulator
     Step-Up DC/DC Converter
     Step-Down DC/DC Converter
     Linear Constant LED Driver
     Charger Pump
     LED Backlight Driver
     LED Screen Driver
     Audio AMPLIFIER
     AC/DC Converter
     AC/DC Converter Supply
     Voltage detector/Reset IC
     Li-ion Battery Charger
     MOSFET
     MOSFET for LED Screen & BJT
ME8317

Descriptionú║
The ME8317 is a high performance offline PSR controller for low power AC/DC charger and adapter applications. ME8317 integrates a high voltage power CoolMOS of 600V, 2A. It operates in primary-side sensing and regulation. Consequently, opto-coupler and ME431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure.1 below. In CC control, the current and output power setting can be adjusted externally by the sense resistor RS at CS pin. In CV control, PFM operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation. The chip consumes very low operation
current (typical 420Ž╠A), it can achieve less than 50mW standby power to meet strict standby power standard.
ME8317 offers cmprehensive protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD over voltage protection, feedback loop open protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), etc.
Featuresú║
í˝í└5% Constant Voltage Regulation at universal AC input
í˝High precision constant current regulation at universal AC input
í˝Primary-side sensing and regulation without ME431 and opo-coupler
í˝Built-in primary winding inductance compensation
í˝Programmable cable drop compensation
í˝Ultra low start-up current (Typ. 1Ž╠A)
í˝VDD over voltage protection
í˝Built-in feedback loop open protection
í˝Built-in leading edge blanking (LEB)
í˝Built-in short circuit protection
í˝Cycle-by-Cycle current limiting
í˝VDD under voltage lockout with hysteresis (UVLO)
í˝SOP7 package
Applicationsú║
Low power AC/DC offline SMPS for:
í˝Cell phone charge
í˝Digital cameras charger
í˝Small power adapter
í˝Auxiliary power for PC, TV, etc.
Nanjing Micro One Electronics Inc. 5th Floor,Building No.1, No.699-8 Xuanwu Road, Xuzhuang software Park,Nanjing
Tel:86-25-84731186    Fax:86-25-84731136 ╦ŇICP▒Ş12033088║┼