APS39903MTR-G1

A Product Line of Diodes Incorporated APS39903 PUMP EXPRESS NEW PRODUCT Description TM COMPATIBLE AC/DC PSR SWITCHER 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. 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. (Top View) 7 GND 3 6 C 4 5 C CPC 1 FB 2 VCC CS SO-7 Features  Compatible to MediaTek Pump ExpressTM Protocol  Ultra-Low Standby Power Consumption  Built-in NPN Transistor with 700VCBO The APS39903 can work individually to achieve Ultra-Low standby power under 5V output.  Valley-turn On to Reduce Switching Loss and Benefit for EMI  The APS39903 is packaged in SO-7. Piece-wise Frequency Reduction to Enhance Conversion Efficiency and Suppress Audio Noise  ±5% Constant Voltage Accuracy for 5V Output  Audio Noise Suppression  Open Circuit Protection (OCkP)  Current Sense Resistor Short Protection  Over Voltage Protection (OVP)  Over Temperature Protection (OTP)  Short Circuit Protection (SCP) with Hiccup  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3) Applications  Adapters/Chargers Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain