OB2535 PWM Power Switch

OB2535 is a high performance offline PWM Power switch for low power AC/DC charger and adapter applications.

It can achieve ±5% precision constant voltage (CV) and high precision constant current (CC). It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated.

Features of OB2535

• ±5% constant voltage regulation at universal AC input

• Primary-side sensing and regulation without TL431 and opto-coupler

• Programmable CV and CC regulation

• Adjustable constant current and output power setting

• Built-in primary winding inductance compensation

• Programmable cable drop compensation

• Power on soft-start

• Built-in leading edge blanking (LEB)

• Cycle-by-Cycle current limiting

• VDD under voltage lockout with hysteresis (UVLO)

• VDD OVP

• VDD clamp

• Available in SOP8 packages, RoHS compliant

Applications of OB2535

• CC/CV Battery Charger

• Cell/Cordless Phone Charger

• Digital Camera Charger

• PDA Charger

• Small Power Adapter

• Auxiliary Power for PC, TV etc.

• Linear Regulator/RCC Replacement