AP4340S Datasheet, PDF (1/10 Pages) Diodes Incorporated – DYNAMIC PSR ACCELERATOR

A Product Line of
Diodes Incorporated
AP4340S
DYNAMIC PSR ACCELERATOR
Description
Pin Assignments
The AP4340S 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 AP4340S can effectively improve the transient
performance of Primary Side Control System.
AP4340S will enable a discharge circuit when it detects the output
voltage is higher than a certain threshold.
The AP4340S is available in SOT23 package.
(Top View)
GND
3
1
VCC
2
OUT
Features
SOT23
 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)
Applications
 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
D1,D2,
R1
D3,D4 _C1
+
C2
+
L2
R2
C4
R11
D7
R12
D6
R9
C3
TR1
D8
R13 R14
++
OUT VCC
C5
C6
GND
IC2
AP4340S
VO
IC1
AP 3785
R10
VCC
NC
OUT
Q1
D5
R5
CBC
FB
EM
GND
CS
R8
R6
CY 1
R7
AP4340S
Document number: DS37278 Rev. 4 - 2
1 of 10
www.diodes.com
January 2015
© Diodes Incorporated