APS39903

NEW PRODUCT A Product Line of Diodes Incorporated APS39903 PUMP EXPRESSTM COMPATIBLE AC/DC PSR SWITCHER Description Pin Assignments The APS39903 is a high accuracy and low cost switching mode power supply switcher for battery charger/adapter applications. It is consists of a primary side regulation controller and a high voltage transistor. The controller regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) in discontinuous conduction mode (DCM). The switcher uses adaptive source current to optimize driving current to reduce driving loss. The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and enters constant current mode when the load current is equal to the maximum system output current. The output voltage and output current limit of APS39903 can be adjusted based on the patterns of load current aligned to MTK Pump Express protocol. (Top View) CPC 1 FB 2 VCC 3 CS 4 7 GND 6C 5C SO-7 The APS39903 provides operating frequency Jitter function from light to full load range to improve the power supply EMI performance. The APS39903 also has built-in fixed cable voltage drop compensation (6% of nominal system output voltage) and adjustable line voltage compensation. The APS39903 can work individually to achieve Ultra-Low standby power under 5V output. The APS39903 is packaged in SO-7. Applications  Adapters/Chargers Features  Compatible to MediaTek Pump Expres...