Description

The AP3770AK6TR is an AC/DC power supply controller designed as a battery charger and adapter for various applications. It uses the Pulse Frequency Modulation (PFM) method to create discontinuous conduction mode (DCM) flyback power supplies. This electronic component falls under the categories of AC DC converters and Offline Switchers.

Specifications and features

• Primary Side Control for Rectangular Constant Current and Constant Voltage Output
• Secondary CV/CC Control Circuitry Eliminating Opto-Coupler
• No Need for Control Loop Compensation Circuitry
• Flyback Topology in DCM Operation
• Random Frequency Modulation to Reduce System EMI
• Built-in Soft Start
• Open Feedback Protection
• Over Voltage Protection
• Short Circuit Protection
• Small SOT-23-5 package to achieve compact size and less component

Application Scenarios

The AP3770AK6TR can be used as an adapter or charger for cell/cordless phones, PDAs, MP3 players, and other portable devices. It is also suitable for standby and auxiliary power supplies, as well as for LED drivers.

Comparison

• Eliminates the need for separate control loop compensation circuitry
• Compact size due to its small SOT-23-5 package
• Offers protection against open feedback, overvoltage, and short circuits
• Uses random frequency modulation to reduce system EMI

• Not suitable for applications requiring continuous conduction mode (CCM)
• May not be ideal for high-power applications