Diodes Incorporated

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

Back to Inactve Datasheet Archive

AP1680 (Not Recommended for new design)

NRND = Not Recommended for New Design

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AP1680 is a high performance AC/DC power supply controller for LED drivers, battery charger and adapter applications. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. The AP1680 provides accurate constant voltage, constant current (CV/CC) regulation while removing the opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP1680 achieves excellent regulation and high average efficiency, yet meets the requirement for no-load consumption less than 30mW.


  • Primary Side Control for Rectangular Constant Current and Constant Voltage Output
  • Sub-microampere Start-up Current
  • 30mW No-load Input Power Feasible
  • Tight CC Regulation Performance
  • Eliminates Opto-coupler and Secondary CV/CC Control Circuitry
  • Eliminates Control Loop Compensation Circuitry
  • Flyback Topology in DCM Operation
  • Random Frequency Modulation to Reduce System EMI
  • Built-in Soft Start
  • Open Feedback Protection
  • Short Circuit Protection
  • SOT-23-6 Package


  • LED Drivers
  • Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus
  • Standby and Auxiliary Power Supplies

Product Specifications

Product Parameters

Accuracy (%) 3
Dimming N/A
Efficiency (%) 85
Frequency (kHz) N/A
LED Current (mA) 350
Maximum DC VDD (VDC) 36
Maximum Input AC Voltage (VAC) 305
Minimum Input AC Voltage (VAC) 85
SupplyCurrent (mA) 0.2
Temperature Range (°C) N/A

Related Content


Technical Documents

Recommended Soldering Techniques


Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2380 2018-11-07 2019-05-07 Device End of Life (EOL)