LOW POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
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.
Adapter/Chargers for Shaver, Cell/Cordless Phones, PDAs, MP3
and Other Portable Apparatus
Standby and Auxiliary Power Supplies
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
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Document number: DS36737 Rev. 6 - 2
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