Power DER-113 5 w, 5 v charger using tny274p Datasheet

Design Example Report
Title
5 W, 5 V Charger using TNY274P
Specification
Input: 85 – 264 VAC
Output: 5 V / 1 A
Application
Portable Audio / MP3 Player
Author
Power Integrations Applications Department
Document
Number
DER-113
Date
July 19, 2006
Revision
1.1
Summary and Features
•
•
•
•
•
•
CVCC adapter
High Efficiency
Meets CEC efficiency and no-load specs
<100 mW No Load Consumption
Low conducted EMI without Y cap
CC mode has good temperature compensation
The products and applications illustrated herein (including circuits external to the products and transformer
construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign
patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at
www.powerint.com.
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
Table Of Contents
1
2
3
4
Introduction .................................................................................................................3
Power Supply Specification ........................................................................................4
Schematic ...................................................................................................................5
Circuit Description.......................................................................................................6
4.1
Primary clamp snubber........................................................................................6
4.2
Bias supply ..........................................................................................................6
4.3
CVCC circuit ........................................................................................................6
5 PCB Layout.................................................................................................................7
6 Bill Of Materials...........................................................................................................8
7 Transformer Specification ...........................................................................................9
7.1
Electrical Diagram................................................................................................9
7.2
Electrical Specifications .......................................................................................9
7.3
Materials ..............................................................................................................9
7.4
Transformer Build Diagram................................................................................10
7.5
Transformer Construction ..................................................................................10
8 Transformer Spreadsheets .......................................................................................11
9 Performance Data.....................................................................................................14
9.1
Efficiency ...........................................................................................................14
9.1.1
Active Mode CEC Measurement Data........................................................15
9.2
No-load Input Power ..........................................................................................16
9.3
Regulation .........................................................................................................16
9.3.1
Output Characteristic..................................................................................16
10
Thermal Performance............................................................................................17
11
Waveforms ............................................................................................................18
11.1 Drain Voltage and Current, Normal Operation...................................................18
11.2 Output Voltage Start-up Profile ..........................................................................18
11.3 Drain Voltage and Current Start-up Profile ........................................................19
11.4 Load Transient Response (75% to 100% Load Step)........................................20
11.5 Output Ripple Measurements ............................................................................21
11.5.1 Ripple Measurement Technique.................................................................21
11.5.2 Measurement Results.................................................................................22
12
Conducted EMI .....................................................................................................23
13
Revision History ....................................................................................................24
Important Note:
Although this board is designed to satisfy safety isolation requirements, the engineering
prototype has not been agency approved. Therefore, all testing should be performed
using an isolation transformer to provide the AC input to the prototype board.
Page 2 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
1 Introduction
This document is an engineering report describing a design for a 5 V / 1 A adapter. The
power supply utilizes a TNY274 as the switching controller.
The document contains the power supply specification, schematic, bill of materials,
transformer documentation, printed circuit layout, and performance data.
Figure 1 – Populated Circuit Board Photograph.
Page 3 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
2 Power Supply Specification
Description
Input
Voltage
Frequency
No-load Input Power (230 VAC)
Output
Output Voltage (CV)
Output Voltage (CC)
Output Ripple Voltage
Output Current
Total Output Power
Continuous Output Power
Efficiency
Full Load
Required average efficiency at
25, 50, 75 and 100 % of POUT
Symbol
Min
Typ
Max
Units
Comment
VIN
fLINE
85
47
265
64
0.3
VAC
Hz
W
2 Wire – no P.E.
50/60
VOUT
VOUT
VRIPPLE
IOUT
4.75
5.25
100
1
V
V
mV
A
5
W
5
1
0
POUT
η
68
ηCEC
63.5
70
± 5%
CC prior to auto-restart
20 MHz bandwidth
CV Operation Mode
o
%
Measured at POUT 25 C
%
Per California Energy Commission
(CEC) / Energy Star requirements
Environmental
Conducted EMI
Meets CISPR22B / EN55022B
Designed to meet IEC950, UL1950
Class II
Safety
Surge
Ambient Temperature
Page 4 of 25
1.5
TAMB
0
kV
50
o
C
1.2/50 µs surge, IEC 1000-4-5,
Series Impedance:
Differential Mode: 2 Ω
Common Mode: 12 Ω
Free convection, sea level
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
3 Schematic
Figure 2 – Schematic.
Page 5 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
4 Circuit Description
4.1 Primary clamp snubber
D5 is a normal recovery, glass passivated 1N4007G for good EMI and higher efficiency.
If the glass passivated version of the 1N4007 is not available then the FR107 is
recommended. Standard plastic 1N4007 types are not recommended due to excessive
drain ringing.
4.2 Bias supply
D6, C5 and R3 provide a small bias current to the TNY274 to reduce no-load
consumption and reduce its temperature.
4.3 CVCC circuit
Transistors Q1-Q3, and associated resistors form the constant current regulation circuit.
Resistor R8 and R7 form the current sense resistor. In CC mode the voltage drop on it is
regulated to 0.35 V. This CC circuit has built in temperature compensation.
VR1 regulates the output in CV mode.
Page 6 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
5 PCB Layout
Figure 3 – Printed Circuit Layout.
Page 7 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
6 Bill Of Materials
Item Qty Part Reference
Value
Description
1
2
C1 C2
6.8 uF
6.8 uF, 400 V, Electrolytic, (10 x 16),
2
1
C3
100 nF
100 nF, 50 V, Ceramic, Z5U
3
1
C4
1 nF
4
1
C5
4.7 uF
5
1
C6
1 nF
6
1
C7
1000 uF
1 nF, 1 kV, Disc Ceramic
4.7 uF, 50 V, Electrolytic, Gen. Purpose, (5 x 11)
1 nF, 100 V, Ceramic, X7R
1000 uF, 10 V, Electrolytic, Very Low ESR, 41
mOhm, (8 x 20)
10 nF, 50 V, Ceramic, Z5U
7
1
C8
10 nF
8
4
D1 D2 D3 D4
1N4007
9
1
D5
1N4007GP
10
1
D6
1N4148
75 V, 300 mA, Fast Switching, DO-35
11
1
D7
SB330
30 V, 3 A, Schottky, DO-201AD
12
1
HS1
13
1
L1
14
1
L2
15
2
Q1 Q2
2N3904
16
1
Q3
2N3906
17
1
R1
200 k
18
1
R2
200
200 R, 5%, 1/4 W, Carbon Film
19
1
R3
11 k
11 k, 5%, 1/8 W, Carbon Film
20
1
R4
10
10 R, 5%, 1/4 W, Carbon Film
21
1
R5
150
150 R, 5%, 1/8 W, Carbon Film
HS
1000 V, 1 A, Rectifier, DO-41
1000 V, 1 A, Rectifier, Glass Passivated, 2 us, DO-41
HEATSINK Custom
Ferrite Bead 3.5 mm x 7.6 mm, 75 Ohms at 25 MHz, 22 AWG
hole, Ferrite Bead
1 mH
1 mH, 0.15 A, Ferrite Core
NPN, Small Signal BJT, 40 V, 0.2 A, TO-92
PNP, Small Signal BJT, 40 V, 0.2 A, TO-92
200 k, 5%, 1/2 W, Carbon Film
22
1
R6
10 k
10 k, 5%, 1/8 W, Carbon Film
23
1
R7
10
10 R, 5%, 1/8 W, Carbon Film
24
1
R8
0.33
25
2
R9 R11
1k
1 k, 5%, 1/8 W, Carbon Film
26
1
R10
470
470 R, 5%, 1/8 W, Carbon Film
0.33 R, 1%, 1/2 W
27
1
R12
1.6 k
1.6 k, 5%, 1/8 W, Carbon Film
28
1
R13
200
200 R, 5%, 1/8 W, Carbon Film
29
1
RF1
8.2
30
1
T1
EE16
31
1
U1
TNY274P
32
1
U2
PC817A
33
1
VR1
Page 8 of 25
8.2 R, 2.5 W, Fusible/Flame Proof Wire Wound
Bobbin, EE16, Horizontal, 10 pins
TinySwitch-III, TNY274P, DIP-8C
Opto coupler, 35 V, CTR 80-160%, 4-DIP
BZX79-B4V3 4.3 V, 500 mW, 2%, DO-35
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
7 Transformer Specification
7.1
Electrical Diagram
4
W1
Bias
5
10
NC
W4
+5V
NC
8
W3
Balance Winding
1
2
W2
Primary
3
Figure 4 – Transformer Electrical Diagram.
Copper Foil Wrapped in
Tape
Starting lead to be connected to pin 1
Figure 5 – Copper Foil preparation for winding 3.
7.2
Electrical Specifications
Electrical Strength
Primary Inductance
Resonant Frequency
Primary Leakage Inductance
7.3
60 second, 60 Hz, from Pins 1-5 to Pins 6-10
Pins 2-3, all other windings open, measured at
132 kHz.
Pins 2-3, all other windings open
Pins 2-3, with Pins 8-10 shorted, measured at
132 kHz.
3000 VAC
2519µH, -0/+12%
733 kHz (Min.)
65µH (Max.)
Materials
Item
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
Description
Core: EE16 Gapped for 174 nH/T^2
Bobbin: EE16 Horizontal 10 Pins
Magnet Wire: 34 AWG
Triple Insulated Wire: 26 AWG
Copper Foil 0.06 mm tick, 7.6mm wide
Tape, 8.6 mm Wide
Tape, 12 mm Wide
Varnish
Page 9 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
7.4
5 W Charger for Portable Audio Player
July 19, 2006
Transformer Build Diagram
Tape
8
10 6T # 26 TIW X 2
W4
Tape
W3
1.5T Copper Foil
1
Tape
2
40 T #34 AWG
W2
Tape
40 T #34 AWG
Tape
Tape
W1
3
40 T #34 AWG
5
4
20T # 34 AWG X 2
10T
10T
Figure 6 – Transformer Build Diagram.
7.5
Transformer Construction
Bobbin Preparation
W1 Bias Winding +
Core Cancellation
Basic Insulation
W2 Primary
Basic Insulation
Place the bobbin [2] on the winding machine with the primary pin side
oriented to the left hand side.
Start at Pin 4. Wind 10 bifilar turns of item [3] from left to right. Take the
lead out of the winding area and terminate it at pin 5. Bring the lead back
to the winding area and continue winding on the same layer. Wind 10
more turns. The whole layer must be uniformly and tightly wound. Cut the
finishing lead just at the end of the winding.
Use two layers of item [6] for basic insulation.
Start at Pin 3. Wind 40 turns of item [3] from left to right in 1 layer. Use
one layers of item [6] for basic insulation. Continue winding on a second
layer. Wind 40 turns from right to left. Use one layers of item [6] for basic
insulation. Wind 40 more from left to right on a third layer. Terminate on
pin 2. The three layers should be uniformly and tightly wound.
Use one layers of item [6] for basic insulation.
Prepare winding as shown in figure 5 using items [5] and [7]. Very
W3, Balance
Winding
important. For this winding reverse the winding direction of
the machine. Start at pin 1, Wind 1.5 turns of copper foil. Finish lead is
Basic Insulation
W4 Secondary
Winding
Outer Wrap
Final Assembly
left unconnected.
Use one layer of item [6] for basic insulation.
Start at Pins 10. Wind 6 bifilar turns of item [4] Spread turns evenly
across bobbin. Finish on Pin 8.
Wrap windings with 3 layers of tape item [6].
Assemble and secure core halves. Varnish impregnate using item [8].
Page 10 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
8 Transformer Spreadsheets
ACDC_TinySwitchIII_031006; Rev.1.11;
Copyright Power
Integrations 2006
INPUT
INFO
ACDC_TinySwitch-III_031006_Rev1-11.xls;
TinySwitch-III Continuous/Discontinuous Flyback
OUTPUT UNIT Transformer Design Spreadsheet
ENTER APPLICATION VARIABLES
Customer
VACMIN
85
Volts Minimum AC Input Voltage
VACMAX
265
Volts Maximum AC Input Voltage
fL
50
VO
5.33
IO
1.00
Hertz AC Mains Frequency
Volts Output Voltage (at continuous power)
Power Supply Output Current (corresponding to peak
Amps power)
Power
n
0.68
Z
0.81
tC
3.00
CIN
5.33 Watts Continuous Output Power
Efficiency Estimate at output terminals. Under 0.7
if no better data available
Z Factor. Ratio of secondary side losses to the total
losses in the power supply. Use 0.5 if no better data
available
mSec
onds Bridge Rectifier Conduction Time Estimate
uFara
13.6 ds
Input Capacitance
13.60
ENTER TinySwitch-III VARIABLES
TinySwitch-III
Auto
Chosen Device
Chose Configuration
TNY274
Recommended TinySwitch-III
Standard
Current
Limit
Enter "RED" for reduced current limit (sealed
adapters), "STD" for standard current limit or "INC" for
increased current limit (peak or higher power
applications)
TNY274
STD
ILIMITMIN
0.233 Amps Minimum Current Limit
ILIMITTYP
0.250 Amps
ILIMITMAX
0.267 Amps Maximum Current Limit
fSmin
124000 Hertz Minimum Device Switching Frequency
I^2fmin
VOR
117.00
VDS
VD
A^2k I^2f (product of current limit squared and
7.425 Hz
frequency is trimmed for tighter tolerance)
Reflected Output Voltage (VOR < 135 V
117 Volts Recommended)
10 Volts TinySwitch-III on-state Drain to Source Voltage
0.50
0.5 Volts Output Winding Diode Forward Voltage Drop
KP
0.65
KP_TRANSIENT
0.40
Page 11 of 25
Ripple to Peak Current Ratio (KP < 6)
Transient Ripple to Peak Current Ratio. Ensure
KP_TRANSIENT > 0.25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
ENTER BIAS WINDING VARIABLES
VB
22.00 Volts
VDB
Bias Winding Voltage
0.70 Volts
NB
22.64
Bias Winding Number of Turns
VZOV
28.00 Volts
Over Voltage Protection zener diode voltage.
UVLO VARIABLES
V_UV_TARGET
87.87 Volts
V_UV_ACTUAL
84.70 Volts
Target DC under-voltage threshold, above which
the power supply with start
Typical DC start-up voltage based on standard value
of RUV_ACTUAL
RUV_IDEAL
3.43 Mohms Calculated value for UV Lockout resistor
RUV_ACTUAL
3.30 Mohms Closest standard value of resistor to RUV_IDEAL
ENTER TRANSFORMER CORE/CONSTRUCTION VARIABLES
Core Type
EE16
EE16
Core
Enter Transformer Core
EE16
EE16_B
OBBIN
Bobbin
P/N:
PC40EE16-Z
P/N:
EE16_BOBBIN
AE
0.192 cm^2
LE
3.5 cm
AL
Core Effective Path Length
1140 nH/T^2 Ungapped Core Effective Inductance
BW
8.6 mm
M
L
NS
Core Effective Cross Sectional Area
6
0 mm
Bobbin Physical Winding Width
Safety Margin Width (Half the Primary to Secondary
Creepage Distance)
3
Number of Primary Layers
6
Number of Secondary Turns
DC INPUT VOLTAGE PARAMETERS
VMIN
80 Volts
Minimum DC Input Voltage
VMAX
375 Volts
Maximum DC Input Voltage
CURRENT WAVEFORM SHAPE PARAMETERS
DMAX
0.63
Duty Ratio at full load, minimum primary inductance and
minimum input voltage
IAVG
0.11 Amps
Average Primary Current
IP
0.23 Amps
Minimum Peak Primary Current
IR
0.15 Amps
Primary Ripple Current
IRMS
0.15 Amps
Primary RMS Current
Page 12 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
TRANSFORMER PRIMARY DESIGN PARAMETERS
LP
LP_TOLERANCE
2519 uHenries
12 %
Typical Primary Inductance. +/- 12% to ensure a
minimum primary inductance of 2249 uH
Primary inductance tolerance
NP
120
Primary Winding Number of Turns
ALG
174 nH/T^2
Gapped Core Effective Inductance
BM
2909 Gauss
BAC
952 Gauss
Maximum Operating Flux Density, BM<3000 is recommended
AC Flux Density for Core Loss Curves (0.5 X Peak to Peak)
ur
1654
Relative Permeability of Ungapped Core
LG
0.12 mm
Gap Length (Lg > 0.1 mm)
BWE
25.8 mm
Effective Bobbin Width
OD
0.21 mm
Maximum Primary Wire Diameter including insulation
INS
0.04 mm
Estimated Total Insulation Thickness (= 2 * film thickness)
DIA
0.17 mm
Bare conductor diameter
Primary Wire Gauge (Rounded to next smaller standard
AWG value)
AWG
CM
CMA
34 AWG
40 Cmils
273 Cmils/Amp
Bare conductor effective area in circular mils
Primary Winding Current Capacity (200 < CMA < 500)
TRANSFORMER SECONDARY DESIGN PARAMETERS
Lumped
parameters
ISP
4.68 Amps
Peak Secondary Current
ISRMS
2.29 Amps
Secondary RMS Current
IRIPPLE
2.06 Amps
Output Capacitor RMS Ripple Current
CMS
458 Cmils
Secondary Bare Conductor minimum circular mils
Secondary Wire Gauge (Rounded up to next larger standard
AWG value)
AWGS
23 AWG
VOLTAGE STRESS PARAMETERS
VDRAIN
PIVS
Page 13 of 25
640 Volts
24 Volts
Maximum Drain Voltage Estimate (Assumes 20% zener
clamp tolerance and an additional 10% temperature
tolerance)
Output Rectifier Maximum Peak Inverse Voltage
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
9 Performance Data
All measurements performed at room temperature, 60 Hz input frequency. Efficiency
measurements were done at the end of the cable on the load side.
9.1
Efficiency
EFFICIENCY Vs LINE VOLTAGE
80
Output Efficiency (%)
70
60
50
40
30
IOUT=0.95A
20
10
0
80
100
120
140
160
180
200
220
240
260
280
Line Voltage (AC)
Figure 7 – Efficiency vs. Input Voltage, Room Temperature, 60 Hz.
EFFICIENCY Vs LOAD
80
Output Efficiency (%)
70
60
50
40
115VAC
230VAC
30
20
10
0
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
Output Current (A)
Figure 8 – Efficiency Vs Load.
Page 14 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
9.1.1 Active Mode CEC Measurement Data
All single output adapters, including those provided with products, for sale in California
after Jan 1st, 2007 must meet the California Energy Commission (CEC) requirement for
minimum active mode efficiency and no load input power. Minimum active mode
efficiency is defined as the average efficiency of 25, 50, 75 and 100% of rated output
power with the limit based on the nameplate output power:
Nameplate Output (PO)
Minimum Efficiency in Active Mode of Operation
<1W
≥ 1 W to ≤ 49 W
> 49 W
0.49 × PO
0.09 × ln (PO) + 0.49 [ln = natural log]
0.84 W
For adapters that are single input voltage only then the measurement is made at the
rated single nominal input voltage (115 VAC or 230 VAC), for universal input adapters the
measurement is made at both nominal input voltages (115 VAC and 230 VAC).
To meet the standard the measured average efficiency (or efficiencies for universal input
supplies) must be greater than or equal to the efficiency specified by the CEC/Energy
Star standard.
Percent of
Full Load
25
50
75
100
Average
CEC
specified
minimum
average
efficiency (%)
Efficiency (%)
115 VAC
230 VAC
72.63
73.31
72.08
69.25
71.82
69.55
73.25
72.5
70.80
71.52
63.48
More states within the USA and other countries are adopting this standard, for the latest
up to date information please visit the PI Green Room:
http://www.powerint.com/greenroom/regulations.htm
Page 15 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
9.2
5 W Charger for Portable Audio Player
July 19, 2006
No-load Input Power
NO LOAD POWER CONSUMPTION
450
400
Input Power (mW)
350
300
250
200
CEC LIMIT
INPUT POWER
150
100
50
0
80
100
120
140
160
180
200
220
240
260
280
Line Voltage (AC)
Figure 9 – Zero Load Input Power vs. Input Line Voltage, Room Temperature, 60 Hz.
Note: CEC limit is actually 500 mW, not 400 mW as shown in figure above.
9.3
Regulation
9.3.1 Output Characteristic.
Measurements were done at the end of the cable on the load side.
OUTPUT CHARACTERISTIC
6
Output Voltage
5
4
3
115VAC
230VAC
2
1
0
0
0.1 0.2
0.3
0.4
0.5 0.6
0.7
0.8
0.9
1
1.1
1.2
1.3 1.4
1.5
Output Current (A)
Figure 10 – Output Characteristic.
Page 16 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
10 Thermal Performance
When doing this test, the unit was put inside of a cardboard box. The box was put inside
a thermal chamber. No free air was flowing around the unit.
Item
Page 17 of 25
Temperature (°C)
85 VAC
265 VAC
Ambient
50
50
TinySwitch (U1)
93
83
Transformer (T1)
81
84
Output Rectifier (D7)
88
90
Output Capacitor (C7)
77
78
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
11 Waveforms
11.1 Drain Voltage and Current, Normal Operation
Figure 11 – 85 VAC, Full Load.
Upper: IDRAIN, 0.2 A / div
Lower: VDRAIN, 100 V, 2 µs / div
Figure 12 – 265 VAC, Full Load
Upper: IDRAIN, 0.2 A / div
Lower: VDRAIN, 200 V / 2 µs /div
11.2 Output Voltage Start-up Profile
Figure 13 – Start-up Profile, 115VAC
1 V, 2 ms / div.
Page 18 of 25
Figure 14 – Start-up Profile, 230 VAC
1 V, 2 ms / div.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
11.3 Drain Voltage and Current Start-up Profile
Figure 15 – 85 VAC Input and Maximum Load.
Upper: IDRAIN, 0.2 A / div.
Lower: VDRAIN, 100 V & 2 ms / div.
Page 19 of 25
Figure 16 – 265 VAC Input and Maximum Load.
Upper: IDRAIN, 0.2 A / div.
Lower: VDRAIN, 200 V & 2 ms / div.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
11.4 Load Transient Response (75% to 100% Load Step)
In the figures shown below, signal averaging was used to better enable viewing the load
transient response. The oscilloscope was triggered using the load current step as a
trigger source. Since the output switching and line frequency occur essentially at random
with respect to the load transient, contributions to the output ripple from these sources
will average out, leaving the contribution only from the load step response.
Figure 17 – Transient Response, 115 VAC, 75-10075% Load Step.
Top: Load Current, 0.5 A/div.
Bottom: Output Voltage
200 mV, 0.5 ms / div.
Page 20 of 25
Figure 18 – Transient Response, 230 VAC, 75-10075% Load Step
Upper: Load Current, 0.5 A/ div.
Bottom: Output Voltage
200 mV, 0.5 ms / div.
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
11.5 Output Ripple Measurements
11.5.1 Ripple Measurement Technique
For DC output ripple measurements, a modified oscilloscope test probe must be utilized
in order to reduce spurious signals due to pickup. Details of the probe modification are
provided in Figures 19 and 20.
The 5125BA probe adapter is affixed with two capacitors tied in parallel across the probe
tip. The capacitors include one (1) 0.1 µF/50 V ceramic type and one (1) 1.0 µF/50 V
aluminum electrolytic. The aluminum electrolytic type capacitor is polarized, so
proper polarity across DC outputs must be maintained (see below).
Probe Ground
Probe Tip
Figure 19 – Oscilloscope Probe Prepared for Ripple Measurement. (End Cap and Ground Lead Removed)
Figure 20 – Oscilloscope Probe with Probe Master 5125BA BNC Adapter. (Modified with wires for probe
ground for ripple measurement, and two parallel decoupling capacitors added)
Page 21 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
11.5.2 Measurement Results
Ripple measurements were done at the end of the cable on the load side.
Figure 21 – Ripple, 85 VAC, Full Load.
50 uS, 100 mV / div
Figure 22 – 5 V Ripple, 115 VAC, Full Load.
50 uS, 100 mV / div
Figure 23 – Ripple, 230 VAC, Full Load.
50 uS, 100 mV / div
Page 22 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
12 Conducted EMI
Figure 24 – Conducted EMI, Maximum Steady State Load, 115 VAC, 60 Hz, and EN55022 B Limits. Bolt
Traces With OUTRETURN connected to ARTHAND, Light traces With OUTRETURN connected to GND
Figure 25 – Conducted EMI, Maximum Steady State Load, 230 VAC, 60 Hz, and EN55022 B Limits. Bolt
traces with OUTRETURN CONNECTED TO GND. Light Traces with OUTRET Connected to ARTHAND
Page 23 of 25
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
13 Revision History
Date
November 20, 2005
July 19, 2006
Page 24 of 25
Author
VC
PV
Revision
1.0
1.1
Description & changes
Initial release
Edits and corrections
Reviewed
JC / VC
KM
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
DER-113
5 W Charger for Portable Audio Player
July 19, 2006
For the latest updates, visit our website: www.powerint.com
Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power
Integrations does not assume any liability arising from the use of any device or circuit described herein. POWER INTEGRATIONS
MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT
LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
NON-INFRINGEMENT OF THIRD PARTY RIGHTS.
PATENT INFORMATION
The products and applications illustrated herein (including transformer construction and circuits external to the products)
may be covered by one or more U.S. and foreign patents, or potentially by pending U.S. and foreign patent applications
assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at www.powerint.com.
Power Integrations grants its customers a license under certain patent rights as set forth at
http://www.powerint.com/ip.htm.
The PI Logo, TOPSwitch, TinySwitch, LinkSwitch, DPA-Switch, PeakSwitch, EcoSmart, Clampless, E-Shield, Filterfuse, PI Expert and PI FACTS
are trademarks of Power Integrations, Inc. Other trademarks are property of their respective companies. ©Copyright 2006 Power
Integrations, Inc.
Power Integrations Worldwide Sales Support Locations
WORLD HEADQUARTERS
5245 Hellyer Avenue
San Jose, CA 95138, USA.
Main:
+1-408-414-9200
Customer Service:
Phone:
+1-408-414-9665
Fax:
+1-408-414-9765
e-mail: [email protected]
GERMANY
Rueckertstrasse 3
D-80336, Munich
Germany
Phone:
+49-89-5527-3910
Fax:
+49-89-5527-3920
e-mail: [email protected]
JAPAN
Keihin Tatemono 1st Bldg
2-12-20
Shin-Yokohama, Kohoku-ku,
Yokohama-shi, Kanagawa ken,
Japan 222-0033
Phone:
+81-45-471-1021
Fax:
+81-45-471-3717
e-mail:
[email protected]
TAIWAN
5F, No. 318, Nei Hu Rd., Sec. 1
Nei Hu Dist.
Taipei, Taiwan 114, R.O.C.
Phone:
+886-2-2659-4570
Fax:
+886-2-2659-4550
e-mail:
[email protected]
CHINA (SHANGHAI)
Rm 807-808A,
Pacheer Commercial Centre,
555 Nanjing Rd. West
Shanghai, P.R.C. 200041
Phone:
+86-21-6215-5548
Fax:
+86-21-6215-2468
e-mail: [email protected]
INDIA
261/A, Ground Floor
7th Main, 17th Cross,
Sadashivanagar
Bangalore, India 560080
Phone:
+91-80-5113-8020
Fax:
+91-80-5113-8023
e-mail: [email protected]
KOREA
RM 602, 6FL
Korea City Air Terminal B/D,
159-6
Samsung-Dong, Kangnam-Gu,
Seoul, 135-728, Korea
Phone:
+82-2-2016-6610
Fax:
+82-2-2016-6630
e-mail:
[email protected]
EUROPE HQ
1st Floor, St. James’s House
East Street, Farnham
Surrey, GU9 7TJ
United Kingdom
Phone:
+44 (0) 1252-730-140
Fax:
+44 (0) 1252-727-689
e-mail: [email protected]
CHINA (SHENZHEN)
Room 2206-2207, Block A,
Elec. Sci. Tech. Bldg.
2070 Shennan Zhong Rd.
Shenzhen, Guangdong,
China, 518031
Phone:
+86-755-8379-3243
Fax:
+86-755-8379-5828
e-mail: [email protected]
ITALY
Via Vittorio Veneto 12
20091 Bresso MI
Italy
Phone: +39-028-928-6000
Fax: +39-028-928-6009
e-mail: [email protected]
SINGAPORE
51 Newton Road,
#15-08/10 Goldhill Plaza,
Singapore, 308900
Phone:
+65-6358-2160
Fax:
+65-6358-2015
e-mail:
[email protected]
APPLICATIONS HOTLINE
World Wide +1-408-414-9660
Page 25 of 25
APPLICATIONS FAX
World Wide +1-408-414-9760
Power Integrations
Tel: +1 408 414 9200 Fax: +1 408 414 9201
www.powerint.com
Similar pages