ME8311AS7G

The ME8311 is a high performance offline PSR controller for low power AC/DC charger and adapter applications. It integrates a high voltage power MOSFET of 600V, 1A and operates in primary-side sensing and regulation, eliminating the need for opto-coupler and ME431. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated. 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. Good load regulation is achieved by the built-in cable drop compensation. The chip consumes very low operation current (typical 420μA) and can achieve less than 30mW standby power to meet strict standby power standard. ME8311 offers comprehensive 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. ME8311 is a cost effective PSR controller optimized for off-line low power AC/DC applications including battery chargers. It operates in primary side sensing and regulation, thus opto-coupler and ME431 are not required. Proprietary built-in CV and CC control can achieve high precision CC/CV control meeting most charger application requirements.

Applications

• Cell phone charge
• Digital cameras charger
• Small power adapter
• Auxiliary power for PC, TV, etc.

Key features

• High precision constant current regulation at univers AC input
• Primary-side sensing and regulation without ME431 and opto-coupler
• Built-in primary winding inductance compensation
• Programmable cable drop compensation
• Ultra low start-up current (Typ. 1μA)
• VDD over voltage protection
• Built-in feedback loop open protection
• Built-in leading edge blanking (LEB)
• Built-in short circuit protection
• Cycle-by-Cycle current limiting
• VDD under voltage lockout with hysteresis (UVLO)