AP4341S Datasheet, PDF (1/8 Pages) Diodes Incorporated – DYNAMIC PSR ACCELERATOR

AP4341S
DYNAMIC PSR ACCELERATOR
Description
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.
Pin Assignments
(Top View)
GND
3
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.
1
VCC
2
OUT
SOT23
Features
Applications
 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
Notes:
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"
and Lead-free.
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
L1
TR1
D4 to D7
C1
+
R3
C2 +
R4
C8
R12
D2
R11
D1
R6
R7
OUT VCC
++
C3
C4
GND _IC2
AP4341S
VO
L2
C5
D3
R10
IC1
VCC
CS
OUT
R5
CPC
FB
C6
EM
GND
IS
Q1
R16
R17
R2
AP4341S
Document number: DS38219 Rev. 2 - 2
1 of 8
www.diodes.com
December 2015
© Diodes Incorporated