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AP3103A
Document number: DS37491 Rev. 2 - 2
1 of 12
www.diodes.com
September 2014
© Diodes Incorporated
AP3103A
A Product Line of
Diodes Incorporated
COST EFFECTIVE GREEN PWM CONTROLLER
Description
The AP3103A is a low startup current, current mode PWM controller
with green-mode power-saving operation. The PWM switching
frequency at normal operation is externally programmable and is
trimmed to a tight range. The dithering of frequency will also improve
the EMI feature. When the load decreases, the frequency will reduce
and when at a very low load, the IC will enter the „burst mode‟ to
minimize switching loss.
About 20kHz frequency switching is to avoid the audible noise as well
as reducing the standby loss. The skip mode point can be adjusted
through the external resistor connected to the current sense resistor.
The AP3103A features a lot of functions such as the Leading-Edge
Blanking (LEB) of the current sensing, internal slope compensation
and several protection functions including cycle-by-cycle current limit
(OCP), VCC Over Voltage Protection (VOVP) and OLP protection.
This IC is available in SOT26 package.
Features
Very Low Start-up Current
Current Mode Control
Non-audible-noise Green-mode Control
Skip Mode Adjustable
Internal Slope Compensation
Soft Start During Startup Process
Frequency Fold Back for High Average Efficiency
Secondary Short Winding Protection with FOCP
Soft Switching for Reducing EMI
VCC Maintain Mode
Useful Pin Fault Protection:
SENSE Pin Floating
RI Pin Short to Ground
FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Load Protection (OLP)
Mini Size with Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Pin Assignments
(Top View)
SOT26
Applications
Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power
Set-top Box(STB) Power Supply
Open Frame Switching Power Supply
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.
1
2
3 4
5
Pin 1 Mark
6
GND
FB
RI
GATE
VCC
SENSE
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1 Seite 2
- ・ Abmessungen des Paketumrisses on Seite 10
- ・ Paket-Footprint-Pad-Layout on Seite 11
- ・ Teilenummerierungssystem on Seite 9
- ・ Markierungsinformationen on Seite 9
- ・ Blockdiagramm on Seite 3
- ・ Typisches Anwendungsschaltbild on Seite 2
- ・ Technische Daten on Seite 4
- ・ Anwendungsbereich on Seite 1 Seite 2
- ・ Elektrische Spezifikation on Seite 5 Seite 6
