DYNAMIC PSR ACCELERATOR
The AP4341S is an output voltage detector for Primary Side Control
System. It is a low power loss solution. It detects the output voltage
and provides a periodical signal when the output voltage is lower than
a certain threshold. The periodical signal can be coupled by the
transformer to the primary side and provided as an awakening signal
for the main primary side controller. By fast response to secondary
side voltage, the AP4341S can effectively improve the transient
performance of Primary Side Control System.
The AP4341S will enable a discharge circuit when it detects the
output voltage is higher than a certain threshold.
The AP4341S can cooperate with some PSR ICs, such as AP3775,
GP350H and GP350BX.
The AP4341S is available in SOT23 package.
Fast Detector of Supply Voltages
33kHz Output Pulse
No External Components
Low Power Loss for Green Mode Applications
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Adapters/Chargers for Cell/Cordless Phones, ADSL Modems,
MP3 and Other Portable Apparatus
Standby and Auxiliary Power Supplies
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.
Typical Applications Circuit
FR1 L 1
D4 to D7
Document number: DS38219 Rev. 2 - 2
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