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Diodes Semiconductor Electronic Components Datasheet

AP3103A Datasheet

COST EFFECTIVE GREEN PWM CONTROLLER

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AP3103A pdf
A Product Line of
Diodes Incorporated
AP3103A
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.
Pin Assignments
(Top View)
Pin 1 Mark
GND 1
FB 2
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.
RI 3
SOT26
6 GATE
5 VCC
4 SENSE
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)
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.
AP3103A
Document number: DS37491 Rev. 2 - 2
1 of 12
www.diodes.com
September 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP3103A Datasheet

COST EFFECTIVE GREEN PWM CONTROLLER

No Preview Available !

AP3103A pdf
Typical Applications Circuit
C2 R4
R5
C4
R2 R3
NTC
C1
VR1
R7
U1 C3
VCC GATE
RI SENSE
AP3103A
FB
GND
R8
R9
C11
A Product Line of
Diodes Incorporated
AP3103A
R6 C5
R19
T1
C6
R13 C7
L2
C8
R10
R11 R12
R14
R15
C10
R16
AZ431 C9
U2
R17
R18
Pin Descriptions
Pin Number
1
2
3
4
5
6
Pin Name
GND
FB
RI
SENSE
VCC
GATE
Function
Signal ground. Current return for driver and control circuits
Feedback. Directly connected to the opto-coupler
Set the bias current to determine the normal switching frequency
Current Sense
Supply voltage of driver and control circuits
Gate driver output
AP3103A
Document number: DS37491 Rev. 2 - 2
2 of 12
www.diodes.com
September 2014
© Diodes Incorporated


Part Number AP3103A
Description COST EFFECTIVE GREEN PWM CONTROLLER
Maker Diodes
Total Page 12 Pages
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