AP3984 Extremely Low Standby Power PSR Switcher

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Product Information

Specifications

• Product Name: AP3984 5V 1A EV1 Evaluation Board
• Standby Power: Extremely Low
• Switcher Type: PSR
• Input Voltage: AC
• Output Voltage: 5V
• Output Current: 1A

Product Usage Instructions

Chapter 1. Summary

The AP3984 is designed to provide extremely low standby
power.

Chapter 2. Power Supply Specification

The power supply specification includes details about the
transformer specification and test results.

Chapter 3. Schematic

The schematic provides an overview of the evaluation board’s
internal connections and components.

Chapter 4. The Evaluation Board (EVB) Connections

Details the PCB layout and provides a quick start guide for
setting up the evaluation board.

Chapter 5. Testing the Evaluation Board

Includes information on input and output characteristics, key
performance waveforms, thermal test data, and system EMI scan
results.

FAQs

Q: What is the input voltage range for the AP3984 Evaluation

Board?

A: The input voltage is AC.

Q: What is the output current rating of the AP3984 Evaluation

Board?

A: The output current is rated at 1A.

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
Table of Contents
Chapter 1. Summary…………………………………………………………………………………………………..2
1.1 General Description ……………………………………………………………………………………………………………….. 2 1.2 Key Features ………………………………………………………………………………………………………………………… 2 1.3 Applications ………………………………………………………………………………………………………………………….. 2 1.4 Main Power Specifications (CV & CC Mode) …………………………………………………………………………….. 2 1.5 Evaluation Board Picture: ……………………………………………………………………………………………………….. 2
Chapter 2. Power Supply Specification ……………………………………………………………………….3
2.1 Specification and Test Results ………………………………………………………………………………………………… 3 2.1 Transformer Specification……………………………………………………………………………………………………….. 4
Chapter 3. Schematic …………………………………………………………………………………………………5
3.1 Evaluation Board Schematic …………………………………………………………………………………………………… 5 3.2 Bill of Material (BOM) …………………………………………………………………………………………………………….. 6
Chapter 4. The Evaluation Board (EVB) Connections …………………………………………………..7
4.1 Evaluation Board PCB Layout …………………………………………………………………………………………………. 7 4.2 Quick Start Guide Before Connection ………………………………………………………………………………………. 7
Chapter 5. Testing the Evaluation Board……………………………………………………………………..8
5.1 Input & Output Characteristics…………………………………………………………………….8
5.1.1 Input Standby Power……………………………………………… 8 5.1.2 Input Power Efficiency at Different Loading ………………. 8 5.1.3 OCP Current set point with at different AC line …………. 9 5.1.4 PSU Output Characteristics: …………………………………… 9
5.2 Key Performance Waveforms:…………………………………………………………………..10
5.2.1 System start – up time ………………………………………….. 10 5.2.2 System performance- Voltage Stress ……………………… 10 5.2.3 Short-circuit protection of full load………………………….. 11 5.2.5 System Dynamic Response performance……………….. 12
5.3 Thermal Test data at room Temperature after running 1 hr………………………….13 5.4 System EMI Scan ………………………………………………………………………………………14
5.4.1 System EMI L & N -Line Scan Data @115Vac ………. 14 5.4.2 System EMI L & N -Line Scan Data @230Vac ………. 15

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

Chapter 1. Summary
1.1 General Description
The AP3984 stands out as an extremely low standbypower (<10mW) Primary Side Regulation (PSR) switcher for power supplies based on optimal cost- effectiveness, efficiency, Constant Voltage (CV) & Constant Current (CC) accuracy, and versatile protection functions.
The AP3984, with built-in Bipolar Junction Transistor (BJT), regulates the output voltage and current in the primary side by piece-wise Pulse Frequency Modulation (p-PFM) and primary current peak Amplitude Modulation (AM) in discontinuous conduction mode (DCM). The system operating frequency reduces linearly from heavy load to light load in each interval of the p-PFM, and operating frequency is fixed at medium load by varying primary current peak amplitude.
The AP3984 has good transient characteristics in combination with the secondary side IC like AP4341/AP43410 (PSR Accelerator). Typically, minimal voltage of 4.3V at PCB side can be achieved for dynamic test of 5V application system.
The AP3984 provides operating frequency dithering function to improve EMC performance of power supply. The AP3984 also has programmable cable voltage drop compensation function by external resistor.
1.2 Key Features Primary Side Control for Eliminating Opto-coupler Built-in 700V BJT Excellent Transient Characteristics High Voltage and Super-speed Start up External Adjustable Output Cable Voltage Drop
Compensation Ultra-low No-load Power Consumption(<10mW) Multiple PWM/PFM Mode to Improve Audio Noise
and Efficiency Valley-on for Higher Efficiency and Better EMI Multiple Protections: Over Voltage Protection (OVP) Output Short Circuit Protection (SCP) Over Temperature Protection (OTP) Totally Lead-free & Fully RoHS Compliant (SO-7) Halogen and Antimony Free. “Green” Device
1.3 Applications Chargers Auxiliary Supplies Set Top Boxes Appliances

1.4 Main Power Specifications (CV & CC Mode)

Parameter Input Voltage Input standby power Main output Vo / Io Efficiency Total Output Power Protections XYZ Dimension ROHS Compliance

Value 90 to 264VAC 10mW 5V / 1A ~ 76% 5W OCP, OVP, OLP,OTP 41x 31 x15 mm Yes

1.5 Evaluation Board Picture:

Figure 1: Top View

Figure 2: Bottom View

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

Chapter 2. Power Supply Specification

2.1 Specification and Test Results

Parameter
VACIN Input Voltage FLINE Frequency IIN Input Current
No load Pin
5VDC / 1A @115Vac/230Vac Average efficiency
Thermal Performance
EMI Scan Data

Test conditions
–
At 230Vac/50Hz, @ 5V, Pin < 10mW
Board end
5V-1A @ 90Vac
5V-1A @115Vac
5V-1A 230Vac

Min 90 VRMS
47Hz –

Nom
115/230 50/60 –

–

5V/1A

@AP3984 IC =86.4C @85Vac

Under Limit line < -6db
Under Limit line < -6db

Max
264 VRMS 64Hz
0.13ARMS

Eff /DOE Level VI
–
–

10mW

–

–

73.62%

@AP3984 IC=88.0C @264Vac

Eff /CoC V5 Tier2
–
–

Test Summary
–
Pass Pass, 230Vac: 6.3mW Pass, 115Vac: 76.5% 230Vac: 76.8%
Pass
Pass
Pass

DoE VI Eff 0.0834xLn(Po)-0.0014xPo+0.609 <Vo<6V

DoE VI Eff 0.071xLn(Po)-0.0014xPo+0.67

Vo>6V

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
2.1 Transformer Specification AP3984 (90VAC ~ 265VAC one outputs 5W Transformer Spec.) 1) C o r e & Bobbin: EE13, 4+4 pin

2. Transformer Parameters
   1. Primary Inductance (Pin4-Pin2), all other windings are open Lp = 1.75mH ±7% @1KHz

NO Winding NAME

1

Np

2

Nfb

3

Shield

4

Ns

EE13 Ae = 17.1mm^2

TERMINAL NO.

START

FINISH

WIRE

4

2

0.14mmx1

3

1

0.15mm x 1

1 B 1-core

Nc

0.15mm x 2

A

0.5mm x 1

WINDING TURNS 132Ts 23Ts 7.5T 10Ts

Layers 1 3 1 1

Primary Inductance
Primary Leakage Inductance

Pin 4-2,all other windings open, measured at 1kHz, 0.4VRMS
Pin 4-2, all other windings shorted, measured at 10kHz, 0.4VRMS

1.75mH ± 7 % 80 uH (Max.)

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Chapter 3. Schematic
3.1 Evaluation Board Schematic

Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

Figure 3: Evaluation Board Schematic

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3.2 Bill of Material (BOM)

Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

Item

QTY per board

1

2

2

1

3

1

4

1

5

1

6

1

7

1

8

1

9

1

10

1

11

1

12

1

13

1

14

1

15

1

16

1

17

1

18

1

19

1

20

1

21

1

22

1

23

1

24

1

25

1

26

1

27

1

28

1

REF. DES.
C1,C2 C3 C4 C12 C11 BD1 D1 D2 L1 L2 U1 U2 FR1 D11 R1 R2 R3 R4 R5 R6 R7 R8 R9 R11 R12 R13
T1
USB

Description
6.8uF/400V, electrolytic 3.3uF/50V, electrolytic 1nF/1kV, 1206 1nF/50V0603 470uF/7.5V, solid state cap MB10S,1000V/0.8A,MBS S1M-13-F, rectifier diode, SMA S1MWF, rectifier diode,SOD123-FL 4.7uH , inductor ,1206 330uH, color ring inductor AP3984MTR-G1, SOIC-7 AP4341SNTR-G1SOT-23 10ohm, 1W Schottky,SS54,5A/40V,SMB 75kohm, 0603 5% 150kohm, 1206 5% 150ohm , 0805 5% 5.1ohm, 0805,1% 150kohm, 06031% 9.1kohm, 0603 1% 33kohm, 0805 1% 1.5ohm, 0805 1% 15ohm, 0805 1% 20ohm, 0603 5% 20ohm, 0603 5% 51ohm, 0603 5%
EE13 core, PC40, transformer
Horizontal connector

MFG or Supplier

MFG P/N or Supplier P/N Digi key #

AISHI AISHI MURATA MURATA AISHI Diodes Diodes Diodes TDK
Diodes Diodes
Diodes Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo

AP3984EV1 Rev 1.0

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
Chapter 4. The Evaluation Board (EVB) Connections
4.1 Evaluation Board PCB Layout

Figure 4: PCB Board Layout Top View

Figure 5: PCB Board Layout Bottom View

4.2 Quick Start Guide Before Connection 1. The evaluation board is preset at 5V/1A from output + & 2. Ensure that the AC source is switched OFF or disconnected before doing connection. 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 Red & Black wires to ensure correct output voltages at 5V respectively.

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
Chapter 5. Testing the Evaluation Board
5.1 Input & Output Characteristics
5.1.1 Input Standby Power

Input Voltage Pin (w)

115Vac/60Hz 3.5mW

230Vac/50Hz 6.3mW

Note At no loading

Figure 6: The Efficiency curve with at different AC input

5.1.2 Input Power Efficiency at Different Loading

AC input
90VAC/60Hz 115VAC/60Hz 230VAC/50Hz 264VAC/50Hz Avg. Efficiency

10%
72.63% 68.21%

25%
76.79% 75.3%

Efficiency (%) 50%

75%

76.6% 76.94%

76.47 % 77.35%

100%
75.13 76.30% 77.5% 77.59%

Avg. Efficiency
76.54% 76.77%

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

Figure 7: The efficiency curve with different loading

Figure 8: CV & CC Curve at OCP set points

5.1.3 OCP Current set point with at different AC line

AC input I _max

90VAC 1.202A

115VAC 1.208A

230VAC 1.194A

264VAC 1.185A

Note

5.1.4 PSU Output Characteristics:

Line Regulation (at full loading condition):

AC input Voltage

90VAC/60Hz 115VAC/60Hz 230VAC/50Hz 265VAC/50Hz

5.00Vo

5.094V/1.0A 5.103V/1.0A 5.117V/1.0A 5.124V/1.0A

Note 0.6%<1%

Cross Load Regulation (at nominal line AC input voltage):

AC input Voltage

115VAC/60Hz

230VAC/50Hz

5V Full Load

5.103V / 1.0A

5.117V/1.0A

5V 10% of FL

4.957V /0.10A

4.965V/0.10A

Note

2.9%

3.04%

Note: All output voltages are measured at output PCB END.

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
5.2 Key Performance Waveforms:
5.2.1 System start – up time

Figure 9: AP3984 Start up time is 0.68S at 90Vac 5.2.2 System performance- Voltage Stress

Figure 10: AP3984 Rising time 9.08mS, at 90Vac

Figure 11: BJT Q1: Vce=544V; 264VAC/50Hz, load level: 1A

Figure 12: Output schottky: Vak=36.2V; 264VAC/50Hz, load level: 1A

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
5.2.3 Short-circuit protection of full load

Figure 13: 90VAC/60Hz1.29A Pin=8.9mW
5.2.4System output Ripple performance

Figure 14:

264VAC/50Hz1.26A Pin=130mW

Figure 15: The Ripple at 90Vac_in Vpp=74mv FL

Figure 16: The Ripple at 230Vac_in Vpp=67mv FL

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
5.2.5 System Dynamic Response performance

Figure 17:
Vout: 5.55~4.69V 90VAC/50Hz; Load level: 0~1A; Frequency: 10mS-10mS. Slew rate: 250mA/us

Figure 18:
Vout: 5.55~4.69V 264VAC/50Hz; Load level: 0~1A; Frequency: 10mS-10mS. Slew rate: 250mA/us

Figure 19:
Vout: 5.49~4.66V 90VAC/60Hz; Load level: 0~1A; Frequency: manually. Slew rate: 250A/us

Figure 20:
Vout: 5.52~4.72V 264VAC/50Hz; Load level: 0~1A; Frequency: manually. Slew rate: 250A/us

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
5.3 Thermal Test data at room Temperature after running 1 hr

Figure21:
85Vac/60Hz, 1A IC temp: 73.6

AMB temp: 27.7 Core Temp :66.1

Schottky Temp :74.6

Figure 22: 264Vac/60Hz, 1A
AMB temp: 22.5

IC temp: 72.7 Core Temp :63

Schottky Temp :71.2

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

5.4 System EMI Scan 5.4.1 System EMI L & N -Line Scan Data @115Vac

dBµV
1 PK CLRWR 2 AV CLRWR

80 70 EN55022Q 60 EN55022A 50
40
30

20

1 MHz LIMIT CHECK

PASS

10 0

150 kHz

Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

1

Quasi Peak

154 kHz

2

Average

178 kHz

2

Average

774 kHz

1

Quasi Peak

822 kHz

1

Quasi Peak

886 kHz

2

Average

886 kHz

1

Quasi Peak

2.67 MHz

2

Average

3.666 MHz

1

Quasi Peak

6.17 MHz

2

Average

6.17 MHz

1

Quasi Peak

13.562 MHz

2

Average

13.562 MHz

Figure 23: EMI Scan at 115Vac @ L – line

LEVEL dBµV 52.00 34.27 25.48 32.19 33.84 24.39 24.48 14.58 19.87 12.22 21.80 12.58

10 MHz

SGL

TDF
6DB 30 MHz

DELTA LIMIT -13.78 -20.30 -20.51 -23.80 -22.16 -21.60 -31.51 -31.41 -40.12 -37.77 -38.19 -37.41

dB

dBµV
1 PK CLRWR 2 AV CLRWR

80 70 EN55022Q 60 EN55022A 50
40
30

20

1 MHz LIMIT CHECK

PASS

10 0

150 kHz Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

1 Quasi Peak

154 kHz

2 Average

154 kHz

2 Average

722 kHz

1 Quasi Peak

854 kHz

2 Average

918 kHz

1 Quasi Peak

966 kHz

2 Average

2.486 MHz

1 Quasi Peak

2.694 MHz

1 Quasi Peak

7.218 MHz

2 Average

7.994 MHz

1 Quasi Peak

19.802 MHz

2 Average

24.002 MHz

Figure 24: EMI Scan at 115Vac @ N – line

LEVEL dBµV 48.66 35.17 28.94 35.52 26.68 34.08 17.96 28.16 23.48 16.26 21.76 22.20

10 MHz

SGL

TDF
6DB 30 MHz

DELTA LIMIT -17.11 -20.61 -17.05 -20.47 -19.31 -21.91 -28.03 -27.83 -36.51 -33.73 -38.23 -27.80

dB

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide

5.4.2 System EMI L & N -Line Scan Data @230Vac

dBµV
1 PK CLRWR 2 AV CLRWR

80 70 EN55022Q 60 EN55022A 50
40
30

20

1 MHz LIMIT CHECK

PASS

10 0

150 kHz Trace1:

Trace2:

Trace3:

TRACE

1

Quasi Peak

2

Average

1

Quasi Peak

2

Average

1

Quasi Peak

2

Average

1

Quasi Peak

2

Average

1

Quasi Peak

2

Average

1

Quasi Peak

2

Average

EN55022Q EN55022A —
FREQUENCY 158 kHz 158 kHz 466 kHz 466 kHz 890 kHz 890 kHz 2.558 MHz 2.558 MHz 8.958 MHz 9.342 MHz 24.002 MHz 24.002 MHz

LEVEL dBµV 45.64 32.41 39.61 32.25 37.50 28.99 25.50 17.23 25.69 17.27 28.77 22.26

Figure 25: EMI Scan at 230Vac @ L- line

10 MHz

SGL

TDF

6DB 30 MHz

DELTA LIMIT -19.92 -23.15 -16.97 -14.33 -18.49 -17.01 -30.49 -28.76 -34.30 -32.72 -31.22 -27.74

dB

dBµV
1 PK CLRWR 2 AV CLRWR

80 70 EN55022Q 60 EN55022A 50
40
30

20

10 0
150 kHz Trace1: Trace2: Trace3: TRACE 1 Quasi Peak 2 Average 1 Quasi Peak 2 Average 1 Quasi Peak 2 Average 1 Quasi Peak 2 Average 1 Quasi Peak 2 Average 1 Quasi Peak 2 Average

1 MHz LIMIT CHECK

PASS

EN55022Q EN55022A —
FREQUENCY 150 kHz 150 kHz 654 kHz 846 kHz 962 kHz 962 kHz 2.73 MHz 2.73 MHz 7.51 MHz 9.546 MHz 12.738 MHz 24.002 MHz

LEVEL dBµV 44.62 31.06 32.74 30.79 33.24 24.57 28.14 17.24 28.21 18.25 22.42 22.01

Figure 26: EMI Scan at 230Vac @ N – line

AP3984EV1 Rev 1.0

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10 MHz

SGL

TDF
6DB 30 MHz

DELTA LIMIT -21.37 -24.93 -23.25 -15.20 -22.75 -21.42 -27.85 -28.75 -31.78 -31.74 -37.57 -27.98

dB

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Extremely Low Standby Power PSR Switcher AP3984 5V 1A EV1 Evaluation Board User Guide
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 safetyrelated 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
www.diodes.com

AP3984EV1 Rev 1.0

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