Diodes Incorporated
SO 7

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AP1685 (Not Recommended for new design)

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The AP1685 is a high performance AC/DC power factor corrector for mains dimmable LED driver applications. The device uses Pulse Frequency Modulation (PFM) technology to regulate output current while achieving high power factor and low THD. It operates as a BCM (Boundary Conduction Mode) which is good for EMI.

The AP1685 internally integrates a 500V high voltage MOSFET which can realize a lower BOM cost. The AP1685 provides accurate constant current (CC) regulation while removing the opto-coupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. It can meet the requirement of IEC6100-3-2 harmonic standard.

The AP1685 features low start-up current, low operation current. It adopts valley on switching mode to achieve high efficiency. It also has rich protection features including over voltage, short circuit, over temperature protection.

The AP1685 is available in SO-7 package.


  • Boundary Conduction Mode (BCM) Operation to Achieve High Efficiency
  • High PF and Low THD (PF>0.9, THD<30%)
  • High Efficiency
  • Low Start-up Current
  • Tight LED Current
  • Tight LED Open Voltage
  • Valley-mode Switching to Minimize the Transition Loss
  • Internal Integrated 2.5A/500V MOSFET can Cover up to 10W
  • Easy EMI
  • Internal Protections:
    • Under Voltage Lock Out (UVLO)
    • Leading-edge Blanking (LEB)
    • Output Short Protection
    • Output Open Protection
    • Over Temperature Protection
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device


  • Non-dimmable LED drivers

Product Specifications

Product Parameters

Accuracy (%) 3
Dimming N/A
Efficiency (%) 92
Frequency (kHz) 200
LED Current (mA) 230
Maximum DC VDD (VDC) N/A
Maximum Input AC Voltage (VAC) 30
Minimum Input AC Voltage (VAC) 85
SupplyCurrent (mA) N/A
Temperature Range (°C) -40 to 105

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)