Diodes Menu Close
Back to Primary Side Regulation Controllers


Low Power Off-Line PSR Controller

Contact Sales

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


The AP3776B is a high performance AC/DC power supply controller for battery charger and adapter applications. It can meet less than 10mW standby power for “Super Star” charger criteria. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies.
The AP3776B provides accurate constant voltage (CV), constant current (CC) and outstanding dynamic performance without requiring an opto-coupler. It also eliminates the need of loop compensation circuitry while maintaining stability.
The AP3776B achieves excellent regulation and high average efficiency, less than 10mW no-load power consumption and less than 1s startup time. When AP3776B is used with AP4341, APR343 or APR3415, good under-shoot performance and higher conversion efficiency can be achieved.
The AP3776B is available in SO-8 package.


Primary Side Control for Eliminating Opto-coupler
10mW No-load Input Power
Compensation for External Component Temperature Variations
Flyback Topology in DCM Operation
Random Frequency Adjustment to Reduce System EMI
Semi-valley Turn on for the Higher Efficiency
Built-in Soft Start
Over Voltage Protection
Over Temperature Protection
Short Circuit Protection
AP4341, APR343 or APR3415 Awaking Signal Detection
Audio Noise Reduction
Internal Cable Compensation
SO-8 Package
Totally Lead-Free & Fully RoHS Compliant
Halogen and Antimony Free. “Green” Device


  • Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3 and Other Portable Apparatus
  • Standby and Auxiliary Power Supplies

Product Specifications

Product Parameters

VCC Max (V) 28 V
StartupCurrent (µA) 0.2 µA
UVLOThresholdon/off (V) 13/6.1 V
OperatingCurrent (µA) 280 µA
StandbyPower (mW) 10 mW
Power Rating (W) 15 W
CableCompensation 3%

Related Content


Technical Documents

Recommended Soldering Techniques


Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 18 6/25/2022 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 2323 6/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample