G1135P

G1135P High Precision CC/CV Primary-Side PWM Power Switch 1. General Description G1135P is a high performance offline PWM Power switch for low power AC/DC charger and adaptor applications up to 12W.It operates in primary-side regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown In the Fig.1. In CC control,the current and output power setting can be adjusted externally by the mseunltsi-emroedsiestoopr eRraS taiotnCsSarpeinu. tIinlizCedV control, to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation. Device operates in PFM in CC mode as well at large load condition and it operates in PWM with frequency reduction at light/medium load. G1135P offers power on soft start control and protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD OVP, VDD clamp and UVLO. Excellent EMI performance is achieved with frequency jitter technique. Fig.1. Typical CC/CV Curve ANALOG PWM IC Features ◆ 5% CV and CC Regulation at Universal AC input ◆ Primary-side Regulation Without TL431 and Opto-coupler ◆ Built-in High-Voltage Power MOS ◆ Programmable CV and CC Regulation ◆ Adjustable Constant Current and Output Power Setting ◆ Built-in Secondary Constant Current Control with Primary Side Feedback ◆ Built-in Primary winding inductance compensation ◆ Programmable ca...