AP3917C EV4 Step Down Regulator

“`html

Product Information

Specifications

• Model: AP3917C EV4

• Input Voltage: Universal AC Voltage

• Output Voltage: 12V

• Output Current: 175mA

• Topology: Non-isolated buck

• Power Output: 2.1W

• Features: Constant voltage output, low standby power, high
  efficiency at light loading, excellent dynamic response

• Application: Home appliances

Product Usage Instructions

Chapter 1: Introduction

General Description: The AP3917C is an off-line
universal AC Voltage input step-down regulator that provides
accurate constant voltage output, low standby power, high
efficiency at light loading, and excellent dynamic response based
on non-isolated buck topology.

Chapter 2: Power Supply Specification

System Performance: Provides details on the
system performance.

Environment: Specifies the environmental
conditions for optimal operation.

Chapter 3: Schematic and Bill of Material

Schematic: Detailed schematic of the evaluation
board.

Bill of Material: List of components used in
the evaluation board.

Frequently Asked Questions (FAQ)

Q: What is the input voltage range for the AP3917C EV4?

A: The AP3917C EV4 is designed to work with a universal AC
voltage input.

Q: What is the output power rating of the AP3917C EV4?

A: The AP3917C EV4 provides a power output of 2.1W with an
output voltage of 12V and a current of 175mA.

“`

2.1W AP3917C EV4 12V-175mA Dome Evaluation Board User’s Guide

Table of Contents

Chapter1. Introduction…………………………………………..2 1.1 General Description……………………………………..2 1.2 AP3917C Key Features ……………………………….2 1.3 Applications …………………………………………………2 1.4 Board Pictures……………………………………………..2
Chapter2. Power Supply Specification …………………..3 2.1 System Performance……………………………………3 2.2 Environment ………………………………………………..3
Chapter3. Schematic and Bill of Material ………………4 3.1 Schematic ……………………………………………………4 3.2 Bill of Material………………………………………………4
Chapter4. The Evaluation Board Connections ……….5 4.1 PCB Layout………………………………………………….5 4.2 Circuit Description………………………………………..5 4.2.1 Input EMI Filtering ………………………………..5 4.2.2 Control IC……………………………………………..5 4.2.3 Output Rectification ………………………………5 4.2.4 Output Feedback ………………………………….5

4.3 Quick Start Guide ………………………………………..5
5.1 Input & Output Characteristics……………………..6
5.1.1 Input Standby Power ………………………………..6 5.1.2 Efficiency………………………………………………6 5.1.3 Line and Load Regulation …………………….7
5.2 Key Performance Test …………………………………8 5.2.1 Start up Performance……………………………8 5.2.2 Rise Time……………………………………………..9 5.2.3 Voltage Stress…………………………………….10 5.2.4 Output Ripple & Noise ………………………..11 5.2.5 Dynamic Response …………………………….12
5.3 Protection Test …………………………………………..13 5.3.1 Short Circuit Protection (SCP) Test …….13 5.3.2 Open Loop Detection (OLD) Protection Test …………………………………………………………….. 13 5.3.3 Over Load Protection (OLP) Test ……….14
5.4 Thermal Test ……………………………………………..14
5.5 System EMI Scan ………………………………………15 5.5.1 Conduction EMI Test of 230V@full load …………………………………………………………………… 15 5.5.2 Conduction EMI Test of 110V@full load …………………………………………………………………… 16

2.1W AP3917C EV4 Rev1.0

Page 1 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Dome Evaluation Board User’s Guide
Chapter1. Introduction
1.1 General Description
AP3917C is an off-line universal AC Voltage input step-down regulator which provides accurate constant voltage (CV) output, outstanding low standby power, high efficiency@ light loading and excellent dynamic response based on non- isolated buck topology. The AP3917C EV4 Evaluation Board provides a good design example for a cost-effective 2.1W single output 12V/175mA power application used in home appliances.
1.2 AP3917C Key Features
Universal 85V to 265V VAC Input Internal MOSFET 650V (16) Maximum output Current: 270mA typ.@5V output Low Standby Power Consumption (<30mW at no load) High Light-Loading Efficiency and average efficiency can meet DOE IV and CoC V5 Tier 2 Frequency Modulation to suppress EMI to meet EN55022 and FCC part 15 class B Rich Protection including: OTP, OLP, OLD,SCP Extremely low system component count Totally Lead-free & Fully RoHS Compliant (SO-7) Halogen and Antimony Free. “Green” Device
1.3 Applications
Non-Isolated Home Appliances: AC Fans, Rice Cookers, Air conditioners, Coffee Machines, Soy Milk Machines, etc.
Auxiliary Power for IoT Devices.
1.4 Board Pictures

Figure 1: Top View

Figure 2: Bottom View

2.1W AP3917C EV4 Rev1.0

Page 2 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Chapter2. Power Supply Specification
2.1 System Performance The system performance contains input/output characters, specifications, EMC, protections, and etc.

Input AC voltage rating Input AC voltage range Input AC frequency range

Output voltage Output tolerance loading current

Standby power

Efficiency standard

10% load Avg. eff.

Load regulation

Line regulation

Ripple & Noise

Start up time

ESD test

Air Contract

EFT test

Surge Test

Conduction EMI

110V 230V

SCP test OLD test OLP test OTP test

Min.

Typ.

Max.

Input Characters

100V/60Hz

115/230

240V/50Hz

85V/60Hz

–

265V/50Hz

47Hz

50/60

63Hz

Output Characters

11.4V

12V

12.6V

–

±5%

175

Performance Specifications

–

30mW

76.62%

–

81.06%

–

–

±2.47%

±5%

–

±0.27%

±2%

–

70mV

100mV

–
15kV 8kV 2kV

35ms EMC Test
–

50ms
–

1kV

–

–

6dB margin 6dB margin
135

Protection Functions 8.2V 150

–
165

Comments
Two wires, no PE
Test at board terminal mA
@230V/50Hz DoE VI: 71.97% CoC V5 tier 2: 72.03%/62.03% Tested at board terminal Tested at board terminal @full load and full voltage
range 85V/60Hz
@100ohm concrete resistor ±5kHz/100kHz
Differential mode, 2ohm, 1.2/50us
FCC Part 15 Class B EN55022
OK OK OK OK

2.2 Environment

Operation temperature: Operation Humidity: Storage temperature: Storage Humidity:

-20~85 20%~90% R.H. 0~40 0%~95% R.H.

2.1W AP3917C EV4 Rev1.0

Page 3 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
Chapter3. Schematic and Bill of Material
3.1 Schematic

L(TP1) N(TP2)

F1

DB1

~+

~ _

U1 R5

L1

Drain

FB

C1

C2

BP S

C4

S

R1 R2 R3 C6
D1

D2

C5 L2

+V (TP3)

C3

R4

GND (TP4)
Figure 3: Evaluation Board Schematic

3.2 Bill of Material

Items 1 2 3 4 5 6 7 8
9
10 11 12 13 14 15 16 17

Designator F1 DB1 C1, C2 C3 C4 C5 C6 D1
D2
L1 L2 R1 R2 R3 R4 R5 U1 Total

Table 1: Bill of Material

Description 10R, Fusible resistor ABS10A 4.7uF/400V, Electrolytic capacitor 150uF/25V, Electrolytic capacitor 2.2uF/25V, X7R 470nF/50V, X7R 470pF/50V, X7R ES1J, Trr 35ns RS1MSWFQ, Fast type diode, mark R1 1mH, Color ring inductor 1mH, Choke inductor 22.1k 5.62k NC 20k 27k AP3917C

Footprint 310mm SOPA-4 812mm 611mm SMD 0805 SMD 0805 SMD 0805 SMA
SOD123F
DIP, 0510 912mm SMD 0805, 1% SMD 0805, 1% SMD 0805, 5% SMD 0805, 5% SO-7 17pcs

Qty.

Manufacturer

1 OAHE

1 Diodes

2 Aishi

1 Aishi

1 Telesky

1 Telesky

1 Telesky

1 Diodes

1 Diodes

1 Deloop 1 Deloop 1 Panasonic 1 Panasonic 0 1 Panasonic 1 Panasonic 1 Diodes

2.1W AP3917C EV4 Rev1.0

Page 4 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
Chapter4. The Evaluation Board Connections
4.1 PCB Layout

Figure 4: PCB Board Layout Top View

Figure 5: PCB Board Layout Bottom View

4.2 Circuit Description
4.2.1 Input EMI Filtering
The input stage is composed of fusible resistor F1, rectifier bridge DB1, filtering inductor L1, Capacitors C1 and C2. Resistor F1 is a flame proof, fusible, wire-wound resistor. It limits inrush current to safe levels for input rectifier diodes, provides differential mode noise reduction and acts as an input fuse in the event of short circuit.
4.2.2 Control IC
AP3917C co-packages a 650V power MOSFET and control circuitry into a cost- effective SO-7 package. The device is self-starting from the Drain pin with local supply decoupling provided by a small capacitor C4 (at least 100nF) connected to the BP pin when AC source is applied.
4.2.3 Output Rectification
During the ON time of U1, current ramps in L2 and is simultaneously delivered to the load. During the OFF time the inductor current ramps down via the free- wheeling diode D1, feedback diode D2, and the load. Diode D1 should be an ultra-fast diodes (Trr<50ns or lower). Capacitor C4 should be selected to have an adequate ripple margin (low ESR type).
4.2.4 Output Feedback
The voltage across L2 is rectified by C5 and D2 during the off-time of U1. For forward voltage drop of D1 and D2 is approximately equal, the voltage across C5 tracks the output voltage. To provide a feedback signal, the voltage across C5 is divided by R1 and R2. This voltage is specified for U1 at FB pin (2.5V). This allows the simple feedback to meet the required overall output tolerance of ±5% at rated output current.

4.3 Quick Start Guide
1. The evaluation board is preset at 12V/175mA 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” & “N” connectors on the left side of the board. 4. Turn on the AC main switch. 5. Measure “+V” & “GND” connectors to ensure correct output voltage, 12V.
CAUTION: This EV board is non-isolated. Do not touch anywhere there are electrical connections because they are all coupled to high voltage potential.

2.1W AP3917C EV4 Rev1.0

Page 5 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
Chapter 5. System Test
5.1 Input & Output Characteristics
5.1.1 Input Standby Power Standby power and output voltage is measured after 10-minute aging. The voltage data is tested at the PCB terminal. All data is tested at ambient temperature.

Input Power(mW)

Table 2: Standby Power and Output Voltage @no load

AC input Voltage
85V/60Hz 115V/60Hz 230V/50Hz 265V/50Hz

Pin (mW)
19.2 21.1 27.0 28.7

Vo (V)
12.478 12.485 12.415 12.410

AP3917C 12V/175mA Standby Power 40
30
20
10
0 85 105 125 145 165 185 205 225 245 265 AC Input Voltage(Vac)

Figure 6: Standby Power versus Vin Curve

5.1.2 Efficiency

The efficiency data is measured after 10-minute aging, and it is tested at the PCB terminal. All the data is tested at

ambient temperature.

Table 3: Conversion Efficiency

AC input voltage
115V/60Hz

Items
Vo (V) Io (mA) Pin (W)

10%
12.101 17.50 0.2683

25%
12.016 43.75 0.6448

50%
11.944 87.50 1.2776

75%
11.920 108.75 1.5834

100%
11.878 175
2.5522

Avg. Eff. 81.66

230V/50Hz

Efficiency (%) Vo (V) Io (mA) Pin (W)
Efficiency (%)

78.93 12.093 17.50 0.2762 76.62

81.53 11.994 43.75 0.6555 80.05

81.80 11.924 87.50 1.2834 81.30

81.87 11.896 108.75 1.5755 82.12

81.45 11.857
175 2.5688 80.78

81.06

2.1W AP3917C EV4 Rev1.0

Page 6 of 17

11/12/2019 www.diodes.com

Efficiency(%)

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Efficiency vs. Loading
83

82

81

80

79

78

77

76 0

10 20 30 40 50 60 70 80 90 100 Loading(% of full load, 175mA)

Figure 7: Efficiency versus Loading Curve

115Vac/60Hz 230Vac/50Hz

5.1.3 Line and Load Regulation
The line and load regulation data is measured after 10-minute aging. The voltage data is tested at the PCB terminal. All the data is tested at ambient temperature.

Table 4: Line and Load Regulation Data

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz Line Regulation
AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz Line Regulation
AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz Line Regulation

0 12.478 12.485 12.415 12.410 ±0.27%
70 11.984 11.973 11.952 11.949 ±0.15%
140 11.925 11.908 11.883 11.881 ±0.18%

10
12.166
12.157 12.134 12.132 ±0.14%

20
12.097
12.086 12.079 12.076 ±0.09%

Loading(mA)

30

40

12.058 12.031

12.053 12.036 12.034 ±0.10%

12.027 12.009 12.005 ±0.11%

Loading(mA)

80
11.973 11.961 11.939 11.935 ±0.16%

90

100

11.963 11.950 11.927 11.924 ±0.16%

11.954 11.942 11.918 11.913 ±0.17%

Loading(mA)

110
11.943 11.930 11.907 11.904 ±0.16%

±2.38% ±2.47% ±2.27% ±2.27% ±0.18%

160
11.912 11.894 11.871 11.867 ±0.19%

170
11.901 11.887 11.866 11.863 ±0.16%

175
11.898 11.884 11.864 11.859 ±0.16%

50
12.014
12.005 11.986 11.981 ±0.14%

60
11.999
11.989 11.969 11.964 ±0.15%

120
11.936 11.922 11.898 11.895 ±0.17%
Load Regulation
±2.38% ±2.47% ±2.27% ±2.27%
–

130 11.930 11.916 11.891 11.888 ±0.18%
CV Regulation
±2.54%

2.1W AP3917C EV4 Rev1.0

Page 7 of 17

11/12/2019 www.diodes.com

Output Voltage (V)

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

13 12 11 10
9 8 7 6 5
0

I-V Curve

85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

20 40 60 80 100 120 140 160 180 Loading (mA)
Figure 8: Output Voltage versus Loading Curve

5.2 Key Performance Test

5.2.1 Start up Performance

The start-up time is measured with a differential probe across AC inputs, “L” and “N” connectors and a common lowvoltage probe across output terminals, “+V” and “GND” connectors. Before starting up, buck capacitors should be discharged.

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Table 5: Start up Performance

Loading conditions

No load

Full load

19.8ms

31.0ms

19.3ms

30.7ms

19.0ms

29.8ms

18.9ms

29.4ms

Figures
Fig. 9, Fig. 10 –
Fig. 11, Fig. 12

CH2:Vin; CH4:Vo

Figure 9: Start up time is 19.8ms @85Vac/60Hz, no load

Figure 10: Start up time is 31.0ms @85Vac/60Hz, full load

2.1W AP3917C EV4 Rev1.0

Page 8 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Figure 11: Start up time is 18.9ms @265Vac/50Hz, no load

Figure 12: Start up time is 29.4ms @265Vac/50Hz, full load

5.2.2 Rise Time
The rise time is measured with a common low-voltage probe across output terminals, “+V” and “GND” connectors. Before starting up, output capacitors should be discharged.

AC input voltage
85Vac/60Hz 115Vac/50Hz 230Vac/50Hz 265Vac/50Hz

Table 6: Rise Time

Loading conditions

No load

Full load

11.3ms

21.8ms

11.2ms

21.4ms

11.1ms

20.5ms

11.0ms

20.8ms

Figures
Fig. 13, Fig.14 –
Fig. 15, Fig.16

Fig. 13: Rise time is 11.3ms @85Vac/60Hz, no load

Fig 14: Rise time is 21.8ms @85Vac/60Hz, full load

2.1W AP3917C EV4 Rev1.0

Page 9 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Figure 15: Rise time is 11.0ms @265Vac/50Hz, no load

Figure 16: Rise time is 20.8ms @265Vac/50Hz, full load

5.2.3 Voltage Stress The voltage is measured between the “Drain” and “S” pins of AP3917C. The test needs differential probes.

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Table 7: Internal MOSFET Drain-Source Voltage Stress

Loading conditions

No load

Full load

132V

138V

181V

187V

354V

358V

406V

416V

Figures
Fig. 17, Fig 18 –
Fig. 19, Fig. 20

Figure 17: 132V@85Vac/60Hz, no load

Figure 18: 138V@85Vac/60Hz, full load

2.1W AP3917C EV4 Rev1.0

Page 10 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Fig. 19: 406V@265Vac/50Hz, no load

Fig. 20: 416V@265Vac/50Hz, full load

5.2.4 Output Ripple & Noise

The ripple and noise is tested at PCB terminal, using 10:1 probe without probe cap and ground clip. The bandwidth is limited to 20MHz. A 10uF electrolytic capacitor and a 100nF ceramic capacitor should be paralleled to the output terminal.

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Table 8: Ripple & Noise

Loading conditions

No load

Full load

15.4mV

68.5mV

20.5mV

62.8mV

21.8mV

57.6mV

23.7mV

59.5mV

Figures
Fig. 21, Fig.22 –
Fig. 23, Fig. 24

Figure 21: Output R&N, 15.4mV@85Vac/60Hz, no load,

Figure 22: Output R&N, 68.5mV@85Vac/60Hz, full load,

2.1W AP3917C EV4 Rev1.0

Page 11 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Figure 23: Output R&N, 23.7mV@265Vac/50Hz, no load

Figure 24: Output R&N, 59.5mV@265Vac/50Hz, full load

5.2.5 Dynamic Response

The dynamic response of output voltage is tested at the PCB terminal and the bandwidth is limited to 20MHz. Loading is set 0A as low load and 175mA as high load. Besides, the period is 2 seconds and the ramp is set at 250mA/us.

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Table 9: Dynamic Response

Max Vo(V)
12.61 12.67 12.54 12.54

Output voltage Min Vo(V)
11.52 11.46 11.46 11.46

Delta Vo(V)
1.09 1.21 1.08 1.08

Figures
Fig. 25 –
Fig. 26

CH3: Io; CH4: Vo

Figure 25: 12.61V~11.52V @0~175mA,1s, 250mA/us, 85Vac/60Hz

Figure 26: 12.54V~11.46V @0~175mA,1s, 250mA/us, 265Vac/50Hz

2.1W AP3917C EV4 Rev1.0

Page 12 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
5.3 Protection Test
5.3.1 Short Circuit Protection (SCP) Test
The SCP test is measured under the condition that output cable terminals are shorted. The resistance of output cable is 50m.

AC input voltage 85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Max Vo (mV)
320 320 448 448

CH2: Vds; CH3 :Io; CH4: Vo

Table 10: Short Circuit Protection Test

Max Io(mA)
349 364 694 777

Vds(V)
134 179 352 404

Average input power (W) 0.480 0.698 0.442 0.234

Figures
Fig. 27 –
Fig. 28

Figure 27: Output current, 349mA; output voltage, 320mV; Vds, 134V@output is shorted, 85Vac/60Hz

Figure 28: Output current, 777mA; output voltage, 448mV; Vds, 404V@output is shorted, 265Vac/50Hz

5.3.2 Open Loop Detection (OLD) Protection Test

The open loop detection protection is measured when FB pin is connected to Source pin.

AC input voltage
85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Table 11: Open Loop Detection Test
The peak of output voltage(V)
3.01 3.07 3.20 3.20

Figures
Fig. 29 –
Fig. 30

2.1W AP3917C EV4 Rev1.0

Page 13 of 17

11/12/2019 www.diodes.com

CH2: Vds; CH3 :Io; CH4 :Vo

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide

Fig. 29: Output voltage 3.01V@OLD, 85Vac/60Hz, full load

Fig. 30: Output voltage 3.20V@OLD, 265Vac/50Hz, full load

5.3.3 Over Load Protection (OLP) Test

The over load protection point is tested as below: increase the loading by 10mA/step until the system cannot maintain a stable output, and then mark the loading level as over load protection point.

Table 12: Over Load Protection Point test

AC input voltage 85Vac/60Hz 115Vac/60Hz 230Vac/50Hz 265Vac/50Hz

Over load protection point(mA) 250 250 250 250

5.4 Thermal Test The thermal test is under ambient temperature after 1-hour aging. The board has no case in open frame. Thermal imager is used to observe the surface temperature of AP3917C and the free-wheeling diode, D1.

Figure 31: AP3917C, 51.5; D1, 48.5 @85Vac/60Hz, full load, ambient temperature, 25.

Figure 32: AP3917C, 52.6; D1, 49.8 @ 265Vac/50Hz, full load, ambient temperature, 25.

2.1W AP3917C EV4 Rev1.0

Page 14 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
5.5 System EMI Scan The power supply meets EN55022 Class B (for 230Vac input) and FCC part 15 (for 110Vac input) EMI requirements with more than 6dB margin.

5.5.1 Conduction EMI Test of 230V@full load

The test result can pass EN55022 Class B limit with more than 6dB margin.

dBµV 80 70 EN55022Q 60 EN55022A
1 PK 50
CLRWR
40
2 AV CLRWR 30
20

1 MHz LIMIT CHECK PASS

10 MHz

SGL TDF

EDIT PEAK LIST (Final Measurement Results)

Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

LEVEL dBµV

DELTA LIMIT dB

1 Quasi Peak

346.008411606 kHz 47.22

-11.83

2 Average

352.963180679 kHz 33.33

-15.55

2 Average

466.367062279 kHz 34.69

-11.88

1 Quasi Peak

471.030732902 kHz 47.22

-9.27

2 Average

1.44998824519 MHz 32.79

-13.20

1 Quasi Peak

1.52395221823 MHz 42.87

-13.12

2 Average

2.31456322894 MHz 32.80

-13.19

1 Quasi Peak

2.50634031306 MHz 41.30

-14.69

2 Average

5.13072753076 MHz 30.96

-19.03

1 Quasi Peak

6.07634335085 MHz 40.44

-19.55

2 Average

12.9439466322 MHz 27.88

-22.11

1 Quasi Peak

15.0275202 MHz

37.77

-22.22

10

6DB

0

150 kHz

30 MHz

Fig. 33, L line conduction waveform@230Vac/50Hz, full load.

Fig. 34, L line conduction data@230Vac/50Hz, full load.

dBµV 80 70 EN55022Q 60 EN55022A
1 PK 50
CLRWR
40
2 AV CLRWR 30
20

1 MHz LIMIT CHECK PASS

10 MHz

SGL TDF

EDIT PEAK LIST (Final Measurement Results)

Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

LEVEL dBµV

DELTA LIMIT dB

1 Quasi Peak

349.468495722 kHz 49.55

-9.42

2 Average

352.963180679 kHz 34.28

-14.61

2 Average

466.367062279 kHz 35.39

-11.18

1 Quasi Peak

505.008700673 kHz 48.16

-7.83

2 Average

1.44998824519 MHz 32.58

-13.41

1 Quasi Peak

1.52395221823 MHz 41.99

-14.00

2 Average

2.26895718944 MHz 32.37

-13.62

1 Quasi Peak

2.53140371619 MHz 39.14

-16.85

2 Average

5.13072753076 MHz 30.55

-19.44

1 Quasi Peak

6.45016090889 MHz 37.20

-22.79

2 Average

12.8157887448 MHz 27.51

-22.48

1 Quasi Peak

14.4411515385 MHz 35.83

-24.16

10

6DB

0

150 kHz

30 MHz

Figure 35: N line conduction waveform@230Vac/50Hz, full load.

Figure 36: N line conduction data@230Vac/50Hz, full load.

2.1W AP3917C EV4 Rev1.0

Page 15 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s Guide
5.5.2 Conduction EMI Test of 110V@full load
The test result can pass FCC part 15 limit with more than 6dB margin.

dBµV 80 70 EN55022Q 60 EN55022A
1 PK 50
CLRWR
40
2 AV CLRWR 30
20

1 MHz LIMIT CHECK PASS

10 MHz

SGL TDF

EDIT PEAK LIST (Final Measurement Results)

Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

LEVEL dBµV

DELTA LIMIT dB

1 Quasi Peak

221.118376275 kHz 47.97

-14.80

2 Average

264.49018761 kHz

30.76

-20.52

2 Average

660.656865747 kHz 28.35

-17.64

1 Quasi Peak

673.936068749 kHz 39.44

-16.56

2 Average

1.13065507631 MHz 28.56

-17.43

1 Quasi Peak

1.21221527836 MHz 38.78

-17.21

1 Quasi Peak

2.1374603093 MHz

36.76

-19.23

2 Average

3.6218534158 MHz

25.73

-20.26

2 Average

5.39244619915 MHz 24.87

-25.12

1 Quasi Peak

5.83924652649 MHz 34.64

-25.35

2 Average

12.8157887448 MHz 23.83

-26.16

1 Quasi Peak

13.0733860985 MHz 33.12

-26.87

10

6DB

0

150 kHz

30 MHz

Figure 37: L line conduction waveform@110Vac/60Hz, full load.

Figure 38: L line conduction data@110Vac/60Hz, full load.

dBµV 80 70 EN55022Q 60 EN55022A
1 PK 50 CLRWR
40
2 AV CLRWR 30
20

1 MHz LIMIT CHECK PASS

10 MHz

SGL TDF

EDIT PEAK LIST (Final Measurement Results)

Trace1:

EN55022Q

Trace2:

EN55022A

Trace3:

—

TRACE

FREQUENCY

LEVEL dBµV

DELTA LIMIT dB

2 Average

216.761470714 kHz 33.49

-19.44

1 Quasi Peak

272.504504785 kHz 47.46

-13.57

1 Quasi Peak

382.208547038 kHz 40.61

-17.61

2 Average

694.357005568 kHz 28.86

-17.13

2 Average

1.13065507631 MHz 28.30

-17.69

1 Quasi Peak

1.2489466135 MHz

37.25

-18.74

2 Average

2.1374603093 MHz

25.31

-20.68

1 Quasi Peak

2.634188858 MHz

34.41

-21.58

1 Quasi Peak

5.28619370567 MHz 33.38

-26.62

2 Average

6.57980914316 MHz 24.15

-25.84

1 Quasi Peak

12.5632670765 MHz 31.55

-28.44

2 Average

12.9439466322 MHz 22.89

-27.11

10

6DB

0

150 kHz

30 MHz

Figure 39: N line conduction waveform@110Vac/60Hz, full load.

Figure 40: N line conduction data@110Vac/60Hz, full load.

2.1W AP3917C EV4 Rev1.0

Page 16 of 17

11/12/2019 www.diodes.com

2.1W AP3917C EV4 12V-175mA Demo Evaluation Board User’s 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

2.1W AP3917C EV4 Rev1.0

Page 17 of 17

11/12/2019 www.diodes.com

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>