DIODES AP3125A Dual Output Smart Power Adaptor User Guide
- August 11, 2024
- DIODES
Table of Contents
- DIODES AP3125A Dual Output Smart Power Adaptor
- General Description
- Key Features
- Applications
- AP3125A universal AC input EV1 Specifications (CV mode)
- Evaluation Board
- Evaluation Board Schematic
- Evaluation Board Layout
- Quick Start Guide
- Build of Material:
- Input & Output Characteristics
- Key Performance Waveforms:
- IMPORTANT NOTICE
- LIFE SUPPORT
- Specifications:
- FAQ:
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
DIODES AP3125A Dual Output Smart Power Adaptor
USER GUIDE
General Description
Based on flyback topology, the AP3125A EV1 board is designed to serve as an example for cost-effective power solutions suitable for IoT applications. Rated at 25W power output, AP3125A EV1 board accepts universal AC voltage input while delivers 12V@2A and 5V@0.2A for IoT main functions as well as for IoT connectivity. The AP3125A EV1 meets DOE VI and CoC Tier 2 energy efficiency requirement with standby power lower than 0.2W.
Key Features
- 90 ~265VAC input range
- Current mode control & 65KHz operation switching frequency
- Over 85% Efficiency
- Very low standby input power <0.2W
- Low start-up operating and quiescent currents
- Soft start during startup process.
- Working at CCM mode when AC input is lower and at DCM mode when AC input is higher
- Frequency fold back for high average efficiency
- Built-in Jittering Frequency
- Soft Switching for Reducing EMI
- Internal Auto Recovery OCP, OVP, OLP, OTP Power Protection, cycle by cycle current limit, also with DC polarity protection
Applications
- Switching AC-DC Adaptor & Charger
- Power home Appliances
- Set-top box power supply
- Open frame switching power supply
- Gaming system
AP3125A universal AC input EV1 Specifications (CV mode)
| Parameter | Value |
|---|---|
| Input Voltage | 90 to 265VAC |
| Input standby power | 0.2 W |
| Main output Vo / Io | 12V – 2A |
| Second output Vos/Ios | 5V – 0.2A |
| Efficiency | >85% |
| Total Output Power | 25W |
| Protections | OCP, OVP, OLP,OTP |
| XYZ Dimension | 69 x 42 x 24 mm |
| ROHS Compliance | Yes |
Evaluation Board
AP3125 (90 VAC ~ 230VAC 2 outputs 25W Transformer Spec.)
-
Core& Bobbin: RM8, 6+6 pin
-
Transformer Parameters
1. Primary Inductance (Pin1-Pin6), all other windings are open
Lp = 0.85mH ± 5 %@1KHz -
Transformer Winding Construction Diagram
| Item | Windings | Winding Specification |
|---|---|---|
| 1 | WD1-Primary Winding | Start from Pin 1, 28# AWG*1, 26Ts Two layers, end at |
Pin 2.
2| Insulation| 1 Layer of insulation tape
3| Shielding Winding| Start from Pin 4, 34# AWG2 with full layer winding, end
flowing wire.
4| Insulation| 1 Layer of insulation tape
5| WD2 Aux Winding| Start from Pin 5, 32# AWG x2, 11TsT one layers, end at Pin
4.
6| Insulation| 2 Layers of insulation tape
7| WD3 NS1 Secondary
Winding| Start from FL1 with white tube, triple of insulation 26# AWG2, 8Ts,
one layer,
end fold back to top side with black tube.
8| WD4 NS2 Secondary Winding| Start from FL3, triple of insulation
32# AWG2, 4Ts, one layer, end fold back to top side with FL4 with black tube.
9| Insulation| 2 Layers of insulation tape
10| WD5-Primary Winding| Start from Pin 2, 28# AWG1, 26Ts, Two layers, end at
Pin 6.
11| Insulation| 2 Layers of insulation tape
Evaluation Board Schematic
Figure 3: Evaluation Board Schematic
Evaluation Board Layout
Quick Start Guide
1. The evaluation board is preset at 12V/2A from TH1 ~TH3 & 5V/0.2A from
TH2~TH3
2. Ensure that the AC source is switched OFF or disconnected.
3. Connect the AC line wires of power supply to “L and N” on the left side of
the board.
4. Turn on the AC main switch.
5. Measure TH1~TH3 and TH2~TH3 to ensure correct output voltages at 12V and
5V, respectively.
Build of Material:
| Item | Qty | Reference | AP3125A EV1 08-05-2016 | Size | Company |
|---|---|---|---|---|---|
| 1 | 1 | C1 | 68µF/400V, AL Cap | 16 * 25mm | Wurth |
| 2 | 1 | C2 | 6.8µF/25V, Ceramic Cap | X7R, ±10%, SMD0805 | X7R, ±10% |
| 3 | 1 | C4 | 680µF/16V, Polymer Cap | 10 * 13mm | Wurth |
| 4 | 1 | C3 | 220µF/16V, AL Cap | 8 * 11mm | Wurth |
| 5 | 1 | C6 | 10µF/50V, AL Cap | 5 * 11mm | Wurth |
| 6 | 1 | C7 | 2.2nF/50V | X7R, ±10%, 0805 | Wurth |
| 7 | 1 | C8 | 0.1µF/50V | X7R, ±10%, 0805 | Wurth |
| 8 | 1 | C9 | 180pF/50V | X7R, ±10%, 0805 | Wurth |
| 9 | 1 | C10 & C11 | 2.2nF/500V | X7R, ±10%, 1206 | |
| 10 | 1 | C13 | 0.1µF/50V | X7R, ±10%, 0805 | Wurth |
| 11 | 1 | C14 | NULL | ||
| 12 | 1 | C15 & C16 | 10µF/16V, SMDCap | Y5U, ±10%, SMD0805 | |
| 13 | 1 | C17 | 33pF | NPO, ±10%, SMD0805 | |
| 14 | 1 | R1 & R2 | NULL | ||
| 15 | 1 | R3 & R4 | 1M ohm | SMD 1206 | |
| 16 | 1 | R5 & R6 | NULL | ||
| 17 | 1 | R7 | 10Ω | ±5%, SMD0805 | |
| 18 | 1 | R8 | 20Ω | ±5%, SMD0805 | |
| 19 | 1 | R9 | 33Ω | ±5%, SMD0805 | |
| 20 | 1 | R10 | 10KΩ | ±5%, SMD0603 | |
| 21 | 1 | R11 | NULL | ±5%, SMD0805 | |
| 22 | 1 | R12 | 6.8KΩ | ±5%, SMD0805 | |
| 23 | 1 | R12A/B/C | 2.2Ω / 2.2Ω/ 2.2Ω | ±1%, SMD1206 | |
| 24 | 1 | R13 | 270KΩ | ±5%, SMD1206 | |
| 25 | 1 | R14 | 33Ω | ±5%, SMD1206 | |
| 26 | 2 | R15A/B | 300KΩ | ±5%, SMD1206 | |
| 27 | 1 | R17 | 680Ω | ±5%, SMD0805 | |
| 28 | 1 | R18 | 5.6KΩ | ±5%, SMD0805 | |
| 29 | 1 | R19 | 562KΩ , 5% | 1%, SMD0805 | |
| 30 | 1 | R20 | 10KΩ | ±5%, SMD0805 | |
| 31 | 1 | R21 | 10.5KΩ, 1% | ±1%, SMD0805 | |
| 32 | 1 | R22 | 41.2KΩ, 1% | ±1%, SMD0805 | |
| 33 | 1 | RT2 | 100KΩ | ±5%, SMD0805 | |
| 34 | 1 | Q1 | MOSFET, DMG9N65CT | TO220F | Diodes |
| 35 | 1 | IC1 | PWM, AP3125AK, | SOT23-6 | Diodes |
| 36 | 1 | IC2 | Opto PC817C, | DIP | |
| 37 | 1 | IC3 | AZ431, SOT-23 | SMD | Diodes |
| 38 | 1 | T1 | RM8, 850µH | ||
| 39 | 1 | BD1 | Bridge, KBP206G, 2A-600V | DIP | Diodes |
| 40 | 1 | D1 | 1N4007, 1A, 1,000V | DIP | Diodes |
| 41 | 1 | D2 | S1M, 1A, 1,000V | SMD | Diodes |
| 42 | 1 | D3, D12 | 1N4148WS, 75V, SOD323 | SMD | Diodes |
| 43 | 1 | D13 | Schottky, ST10100, TO220-2 | DIP | |
| 44 | 1 | D14 | SBRB1100 1A, 100V, DOS123 | SMD | Diodes |
| 45 | 1 | LF1 | 11mH 0.9A COM chock | DIP | Wurth |
| 46 | 1 | L1 & L2 | L1 = 4.7µH , L2 shorted | DIP | |
| 47 | 1 | NTC | Shorted | ||
| 48 | 1 | CY1 | 1000pF/Ycap | DIP | 250V/Y1 |
| 49 | 1 | Xcap | 0.1µF/Xcap | DIP | 275/X1 305Vac |
| 50 | 1 | Mov | 14D471 | DIP | |
| 51 | 1 | F1 | Fuse 2A/250V | DIP | Slow |
| 52 | 1 | JP1 | Terminal Block 2P | DIP | |
| 53 | 2 | JP2 | Terminal Block 3P | DIP |
Input & Output Characteristics
Input Standby Power
| Input Voltage | 115Vac/60Hz | 230Vac/50Hz | Note |
|---|---|---|---|
| Pin (w) | 78mW | 154mW | No loading |
Input power Efficiency at different loading
| AC input | Efficiency (%) | Eff_avg at four conditions |
|---|---|---|
| 10% | 25% | 50% |
| 90VAC/60Hz | ||
| 115VAC/60Hz | 82.9% | 86.9% |
| 230VAC/50Hz | 78.8% | 88.0% |
| 264VAC/50Hz | ||
| Eff_avg |
Output Characteristics:
Line Regulation (at full loading condition):
| AC input Voltage | 90VAC/60Hz | 115VAC/60Hz | 230VAC/50Hz | 264VAC/50Hz | Note |
|---|---|---|---|---|---|
| outputs | 5.00Vo | 5.52V/0.2A | 5.50V/0.2A | 5.52V/0.2A | 5.52V/0.2A |
| 12.00Vo | 12.01V/2A | 12.01V/2A | 12.02V/2A | 12.01V/2A | 0.5%< |
Cross Load Regulation (at nominal line AC input voltage):
| Loading conditions | 12V= FL & 5V=10%FL | 12V=10% FL & 5V= FL |
|---|---|---|
| 12V/2A & 5V/0.02A | 12V/0.2A & 5V /0.2A | |
| 115VAC | 12.04V / 2A + 5.708V/0.02A | 12.13V/0.2A + 4.94V/0.2A |
| 230VAC | 12.04V /2A + 5.714V/0.02A | 12.13V/0.2A + 4.94V/0.2A |
Current setting with at different AC line
| AC input | 90VAC | 115VAC | 230VAC | 264VAC | Note |
|---|---|---|---|---|---|
| I _max | 2.67A | 2.69A | 2.73A | 2.78A |
Note: All output voltages are measured at output PCB board Edge.
Key Performance Waveforms:
Note: All output voltages are measured at output PCB board Edge.
Key Performance Waveforms:
Please see the recommand Application note for reference (Web page – http://www.diodes.com/appnote_dnote.html)
- For AP3125 operation & set up, please review the Application note:
Application note 1120 Green Mode PWM Controller - For PSU PCB layout consideration, please review the App note: AN1062 High Voltage Green Mode PWM Controller AP3105
- For the basic Flyback topology calculation, please review the App note:
AN1045 Design Guidelines for Off-line AC-DC Power Supply Using BCD. PWM
Controller AP3103
Thermal Test data at room Temperature after running 1 hr
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH
REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR
EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make
modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein.
Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither
does Diodes Incorporated convey any license under its patent or trademark
rights, nor the rights of others. Any Customer or user of this document or
products described herein in such applications shall assume all risks of such
use and will agree to hold Diodes Incorporated and all the companies whose
products are represented on Diodes Incorporated website, harmless against all
damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in
respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any
unintended or unauthorized application, Customers shall indemnify and hold
Diodes Incorporated and its representatives harmless against all claims,
damages, expenses, and attorney fees arising out of, directly or indirectly,
any claim of personal injury or death associated with such unintended or
unauthorized application.
Products described herein may be covered by one or more United States,
international or foreign patents pending. Product names and markings noted
herein may also be covered by one or more United States, international or
foreign trademarks.
This document is written in English but may be translated into multiple
languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in
accordance with instructions for use provided in the labeling can be
reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system
whose failure to perform can be reasonably expected to cause the failure of
the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and
regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal,
regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support
devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further,
Customers must fully indemnify Diodes Incorporated and its representatives
against any damages arising out of the use of Diodes Incorporated products in
such safety-critical, life support devices or systems.
Copyright © 2016, Diodes Incorporated
Specifications:
-
Input Voltage Range: 90 ~ 265VAC
-
Output Voltage: 12V @ 2A, 5V @ 0.2A
-
Power Output: 25W
-
Efficiency: Over 85%
-
Standby Power: Lower than 0.2W
-
Protections: OCP, OVP, OLP, OTP
-
Dimensions: 69 x 42 x 24 mm
-
-
FAQ:
Q: What is the input voltage range of the AP3125A EV1 board?
A: The input voltage range is 90 ~ 265VAC.
Q: What are the output voltages of the AP3125A EV1 board?
A: The board delivers 12V @ 2A and 5V @ 0.2A.
Q: What are the dimensions of the AP3125A EV1 board?
A: The dimensions are 69 x 42 x 24 mm.
Q: Does the AP3125A EV1 board meet energy efficiency requirements?
A: Yes, it meets DOE VI and CoC Tier 2 energy efficiency requirements with standby power lower than 0.2W.
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