APS39903 Datasheet | Diodes Incorporated

NEW PRODUCT A Product Line of Diodes Incorporated PUMP EXPRESSTM PATIBLE 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 pensation (6% of nominal system output voltage) and adjustable line voltage pensation. 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 - patible to Media Tek Pump Express TM Protocol - Ultra-Low Standby Power Consumption - Built-in NPN Transistor with 700VCBO - Valley-turn On to Reduce Switching Loss and Benefit for EMI - 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 (OCk P) - Current Sense Resistor Short Protection - Over Voltage Protection (OVP) - Over Temperature Protection (OTP) - Short Circuit Protection (SCP) with...