Diodes Incorporated

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AP3105 (Not Recommended for new design)

NRND = Not Recommended for New Design

Cost Effective Green PWM Controller

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The AP3105/V/L/R is a low startup current, current mode PWM controller with green-mode power-saving operation. The PWM switching frequency at normal operation is set with 65kHz typically and the dithering of frequency will also improve the EMI feature. When the load decreases, the frequency will reduce and when at a very low load, the IC will enter the ‘burst mode’ to minimize switching loss. About 20kHz frequency switching is to avoid the audible noise as well as reducing the standby loss. The skip mode point can be adjusted through the external resistor connected to the current sense resistor. The AP3105/V/L/R features a lot of functions such as the Leading-Edge Blanking (LEB) of the current sensing, internal slope compensation and several protection functions including cycle-by-cycle current limit (OCP), VCC Over Voltage Protection (VOVP), OTP and OLP protection. The versatile latch function can be set by the customer through few components.


· Switching AC-DC Adapter/Charger · ATX/BTX Auxiliary Power · Set-top Box(STB) Power Supply · Open Frame Switching Power Supply

Product Specifications

Product Parameters

CTRL Pin High Auto-Recover
CTRL Pin Low Latch
Gate OutputCurrent (mA) 350
HV Start-UpCircuit No
Maximum OscillationFrequency (kHz) 65
StartupCurrent (µA) 5
UVLOThresholdon/off (V) 15.5/8.6
VOVP Auto-Recover

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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-2642 2023-09-05 2024-03-05 Device End of Life (EOL)
PCN-2401 2019-01-30 2019-07-30 Device End of Life (EOL)