AP3790 Datasheet | Diodes Incorporated

Description Pin Assignments The AP3790 is a high accuracy and low cost switching mode power supply controller to drive power bipolar transistor for battery charger/adapter applications. 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 controller 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 of AP3790 can be adjusted based on the patterns of load current aligned to MTK Pump Express protocol. The AP3790 provides operating frequency Jitter function from light to full load range to improve the power supply EMI performance. The AP3790 also has built-in fixed cable voltage drop pensation (6% of nominal system output voltage) and adjustable line voltage pensation. The AP3790 can work individually to achieve Ultra-Low standby power under 5V output. The AP3790 is packaged in SO-8. Applications - Adapters/Chargers (Top View) CPC 1 GND 2 FB 3 VCC 4 8 NC 7 OUT 6 NC 5 CS SO-8 Features - patible to Media Tek Pump Express TM Protocol - Ultra-Low Standby Power Consumption - 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 Hiccup - Totally Lead-free & Fully Ro HS pliant (Notes 1 & 2) - Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (Ro HS) & 2011/65/EU (Ro HS 2) pliant. 2. See...