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DCM/CCM Mode Operation with Peakload function

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The AP3118 is a Current Mode PWM controller specially designed for offline power supply that requires ultra-low standby power, high- power density and comprehensive protection. Coordinating with secondary USB PD controller, which can provide a total USB PD solution.


  • Current Mode Control
  • High-Voltage Startup
  • Frequency Fold Back for High Average Efficiency
  • 130k Maximum Frequency for Peak Load
  • Non-Audible-Noise and Green-Mode Control
  • Embedded VCC LDO to Guarantee Wide Range VCC_IN Voltage
  • Constant Output Current in Output Short Situation
  • Low VCC Charge Current Reduces Standby Power in Output Short Situation
  • Internal Slope Compensation
  • Soft Start During Startup Process
  • VCC Maintain Mode
  • X-CAP Discharge Function
  • Precise Secondary Side OVP and UVP
  • Programmable External OTP
  • Brown-Out Protection
  • Overload Protection
  • FOCP and SSCP Protection
  • Useful Pin Fault Protection
  • SSOP-9 (Type CJ) is Available


  • USB PD
  • General Adaptor

Product Specifications

Product Parameters

Operation Mode CCM/DCM
HV Start-UpCircuit Yes
Vcc_MAX(V) 100 (VCC_IN)
UVLOThresholdon/off (V) 14.8/6.7 V
Gate OutputCurrent (mA) -0.7 mA
Maximum OscillationFrequency (kHz) 65 (CCM mode)/ 120 (Peak Load) kHz
BNO Auto-Recover
LOVP Auto-Recover
Release Date 201805

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