18W 12V SMPS Demo Board with ICE3AR2280JG

18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
About this document
Scope and purpose
This document is an engineering report that describes universal input 18 W 12 V off-line flyback converter
power supply using Infineon CoolSET™ F3R80 family, ICE3AR2280JG (DSO16/12). The converter is operated in
Discontinuous Conduction Mode, 100 kHz fixed frequency, low standby power, brownout and various mode of
protections for a high reliable system. This demo board is designed to evaluate the performance of
ICE3AR2280JG in ease of use.
Intended audience
This document is intended for power supply design/application engineer, students, etc.) who wish to design
low cost and high reliable systems of off-line Switched Mode Power Supply (SMPS) for enclosed adapter, bluray/DVD player, set-top box, game console, smart meter, auxiliary power supply of white goods, PC, server, etc.
Table of Contents
About this document ...................................................................................................... 1
1
Abstract ........................................................................................................................ 3
2
Demonstrator board ...................................................................................................... 4
3
Specifications of Demonstrator Board.............................................................................. 5
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
Circuit description ......................................................................................................... 6
Line input ....................................................................................................................................................... 6
Brownout (Line under voltage protection) ................................................................................................. 6
Start up ........................................................................................................................................................... 6
Operation mode ............................................................................................................................................ 6
Soft start ......................................................................................................................................................... 6
RCD clamper circuit ....................................................................................................................................... 6
Peak current control of primary current ..................................................................................................... 6
Output stage .................................................................................................................................................. 7
Feedback and regulation .............................................................................................................................. 7
Active burst mode ......................................................................................................................................... 7
Jittering and soft gate drive ......................................................................................................................... 7
Protection function ....................................................................................................................................... 7
5
Circuit diagram.............................................................................................................. 9
6
6.1
PCB layout ...................................................................................................................11
Top side ........................................................................................................................................................ 11
7
Bill of material..............................................................................................................12
8
Transformer construction ..............................................................................................13
9
9.1
9.2
9.3
Test results ..................................................................................................................14
Efficiency, regulation and output ripple ................................................................................................... 14
Standby power............................................................................................................................................. 16
Line regulation ............................................................................................................................................. 16
Application Note
www.infineon.com
Please read the Important Notice and Warnings at the end of this document
Revision 2.0
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Abstract
9.4
9.5
9.6
9.7
9.8
9.9
Load regulation ........................................................................................................................................... 17
Maximum input power ................................................................................................................................ 17
ESD immunity (EN61000-4-2) ..................................................................................................................... 17
Surge immunity (EN61000-4-5) .................................................................................................................. 17
Conducted emissions (EN55022 class B) .................................................................................................. 18
Thermal measurement ............................................................................................................................... 20
10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
10.13
Waveforms and scope plots ...........................................................................................21
Startup at low/high AC line input voltage with maximum load ............................................................. 21
Soft start ....................................................................................................................................................... 21
Frequency jittering ...................................................................................................................................... 22
Drain and current sense voltage at maximum load................................................................................. 22
Load transient response (Dynamic load from 10% to 100%) ................................................................. 23
Output ripple voltage at maximum load .................................................................................................. 23
Output ripple voltage at burst mode 1 W load ......................................................................................... 24
Active burst mode ....................................................................................................................................... 24
VCC over voltage protection (Odd skip auto restart mode).................................................................... 25
Over load protection (Odd skip auto restart mode) ................................................................................ 25
VCC under voltage/Short optocoupler protection (Auto restart mode)................................................ 26
External protection enable (Non switch auto restart mode).................................................................. 26
Brownout Mode (Non switch auto restart mode) .................................................................................... 27
11
References ...................................................................................................................28
Revision History ...........................................................................................................28
Application Note
2
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2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Abstract
1
Abstract
This document is an engineering report of an universal input 18 W 12 V off-line flyback converter power supply
utilizing F3R80 CoolSET™ ICE3AR2280JG. The application demo board is operated in Discontinuous Conduction
Mode (DCM) and is running at 100 kHz fixed switching frequency. It has a single output voltage with secondary
side control regulation. It is especially suitable for small power supply such as enclosed adapter, blu-ray/DVD
player, set-top box, game console, smart meter or open frame auxiliary power supply of white goods, PC,
server, etc. Besides having the basic features of the F3R CoolSET™ such as active burst mode, propagation
delay compensation, soft gate drive, auto restart protection for major faults (Vcc over voltage, Vcc under
voltage, over temperature, over-load, open loop and short opto-coupler), it also has the BiCMOS technology
design, selectable entry and exit burst mode level, adjustable brownout feature, built-in soft start time, built-in
and extendable blanking time, frequency jitter feature and external auto-restart enable, etc. The particular
features need to be stressed are the best-in-class low standby power and the good EMI performance.
Application Note
3
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2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Demonstrator board
2
Demonstrator board
This document contains the list of features, the power supply specification, schematic, bill of material and the
transformer construction documentation. Typical operating characteristics such as performance curve and
scope waveforms are showed at the rear of the report.
Figure 1
DEMO-3AR2280JG (Top View)
ICE3AR2280JG
Figure 2
DEMO-3AR2280JG (Bottom view)
Application Note
4
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Specifications of Demonstrator Board
3
Table 1
Specifications of Demonstrator Board
Specifications of DEMO-3AR2280JG
Input voltage and frequency
85 VAC (60 Hz) ~ 282 VAC (50Hz)
Output voltage, current and power
12 V, 1.5 A, 18 W
Dynamic load response
(10% to 100% load, slew rate at 1.5 A/µs, 100 Hz)
±3% of nominal output voltage
(Vripple_p_p < 150 mV)
Output ripple voltage
(full load, 85 VAC ~ 282 VAC)
±1% of nominal output voltage
(Vripple_p_p< 50 mV)
Active mode four point average efficiency (25%, 50%, 75%,
100% load) (EU CoC Version 5, Tier 2 and EPS of DOE USA)
> 85% at 115 VAC and 230 VAC
10% load efficiency (EU CoC Version 5, Tier 1)
> 80% at 115 VAC and 230 VAC
No load power consumption (EU CoC Version 5, Tier 1)
< 75 mW at 115 VAC and 230 VAC
Conducted emissions (EN55022 class B)
Pass with 10 dB margin
ESD immunity (EN61000-4-2)
Special Level (±16 kV for both contact and air
discharge)
Surge immunity (EN61000-4-5)
Installation class 4 (±2 kV for line to line and ±4 kV
for line to earth)
Form factor case size (L x W x H)
(103 x 44 x 24) mm3
Application Note
5
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Circuit description
4
Circuit description
4.1
Line input
The AC line input side comprises the input fuse F1 as over-current protection. The choke L11, X-capacitors C11,
and Y-capacitor C12 act as EMI suppressors. Optional spark gap device SA1, SA2 and varistor VAR can absorb
high voltage stress during lightning surge test. After the bridge rectifier BR1 and the input bulk capacitor C13, a
voltage of 90 to 400 VDC is present which depends on input line voltage.
4.2
Brownout (Line under voltage protection)
To avoid the system damaged due to line under voltage, brownout feature is implemented by sensing the
voltage level at BBA pin through the resistors divider from the bulk capacitor. Once the voltage level at BBA pin
falls below 0.9V, the controller stops switching and enters into brownout mode. It is until the input level goes
back to input voltage range and the Vcc hits 17V, the brownout mode is released.
4.3
Start up
Since there is a built-in startup cell in the ICE3AR2280JG, no external start up resistor is required. The startup
cell is connecting the drain pin of the IC. Once the voltage is built up at the drain pin of the ICE3AR2280JG, the
startup cell will charge up the VCC capacitor C16 and C17. When the VVCC exceeds the on-threshold (VVCC =17 V),
the IC starts up. Then the VCC voltage is bootstrapped by the auxiliary winding to sustain the operation.
4.4
Operation mode
During operation, the VCC pin is supplied via a separate transformer winding with associated rectification D12
and buffering C16 and C17.In order not to exceed the maximum voltage at VCC pin due to poor coupling of
transformer winding, an external zener diode ZD11 and resistor R13 can be added.
4.5
Soft start
The soft start is a built-in function and is set at 10 ms.
4.6
RCD clamper circuit
While turns off the CoolMOS™, the clamper circuit R11, C15 and D11 absorbs the current caused by transformer
leakage inductance once the voltage exceeds designed clamp voltage. Finally drain to source voltage is lower
than the maximum break down voltage of CoolMOS™.
4.7
Peak current control of primary current
The CoolMOS™ drain source current is sensed via external shunt resistors R14 and R14A which determine the
tolerance of the current limit control. Since ICE3AR2280JG is a current mode controller, it would have a cycleby-cycle primary current and feedback voltage control which can make sure the maximum power of the
converter is controlled in every switching cycle. Besides, the patented propagation delay compensation is
implemented to ensure the maximum input power can be controlled in an even tighter manner. The demo
board shows approximately ±3.67% of average maximum input power (Figure 12).
Application Note
6
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2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Circuit description
4.8
Output stage
On the secondary side the power is coupled out by a schottky diode D21. The capacitor C22 provides energy
buffering following with the LC filter L21 and C24 to reduce the output voltage ripple considerably. Storage
capacitors C22 is selected to have a very small internal resistance (ESR) to minimize the output voltage ripple.
4.9
Feedback and regulation
The output voltage is controlled using a TL431 (IC21). This device incorporates the voltage reference as well as
the error amplifier and a driver stage. Compensation network C25, C26, R24, R25 and R26 constitutes the
external circuitry of the error amplifier of IC21. This circuitry allows the feedback to be precisely matched to
dynamically varying load conditions and provides stable control. The maximum current through the
optocoupler diode and the voltage reference is set by using resistors R22 and R23. Optocoupler IC12 is used for
floating transmission of the control signal to the “Feedback” input via capacitor C18. The optocoupler used
meets DIN VDE 884 requirements for a wider creepage distance.
4.10
Active burst mode
At light load condition, the system enters into active burst mode. The entry and exit burst mode level can be
selected in ICE3AR2280JG CoolSET™ by adding different capacitance values of capacitor at FBB pin. After
entering into active burst mode, the controller is always active and thus the VCC must always be kept above the
switch off threshold VVCCoff ≥ 10.5 V. During the active burst mode, the efficiency maintains in a very high level
and at the same time it supports low ripple on VOUT and fast response to load jump. To avoid mis-triggering of
the burst mode, there is a 20ms internal blanking time. Once the FBB pin voltage drops below VFB_burst, the
internal blanking timer starts to count. When it reaches the built-in 20 ms blanking time, it then enters active
burst mode.
During active burst mode, the current sense voltage limit is reduced from 1.06 V to V csth_burst so as to reduce the
conduction losses and audible noise. All the internal circuits are switched off except the reference and bias
voltages to reduce the total VCC current consumption to below 0.62 mA. At active burst mode, the FBB voltage
is changing like a sawtooth from 3.2 V to 3.5 V. To leave the active burst mode, FBB voltage must exceed 4 V. It
will reset the active burst mode and turn the system into normal operating mode.
4.11
Jittering and soft gate drive
In order to reduce the emissions of electromagnetic interference (EMI) due to switching noise, the
ICE3AR2280JG is implemented with frequency jittering, soft gate drive and 50 Ω gate turn on resistor. The jitter
frequency is internally set to 100 kHz (± 4 kHz) and the jitter period is 4 ms.
4.12
Protection function
Protection is one of the major factors to determine whether the system is safe and robust. Therefore sufficient
protection is necessary. ICE3AR2280JG provides all the necessary protections to ensure the system is operating
safely. The protections include VCC over voltage, over load/open loop, VCC under voltage/short optocoupler,
over temperature, external protection enable and brownout. When those faults are found, the system will go
into auto restart which means the system will stop for a short period of time and restart again. If the fault
persists, the system will stop again. It is then until the fault is removed, the system resumes to normal
operation. A list of protections and the failure conditions are showed in the below table.
Application Note
7
Revision 2.0
2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Circuit description
Table 2
Protection function of ICE3AR2280JG
Protection function
Failure condition
Vcc Overvoltage
1. VCC > 20.5 V and FB > 4.5 V & during soft start period
2. VCC > 25.5 V
Odd skip Auto Restart
Overtemperature
(controller junction)
TJ > 130°C
Odd skip Auto Restart
Overload / Open
loop
VFBB > 4.5 V, last for 20 ms and extended blanking time
(extended blanking time counted as 256 times of VBBA
charging and discharging from 0.9 V to 4.5V )
Odd skip Auto Restart
Vcc Undervoltage /
Short Optocoupler
VCC < 10.5 V
Auto Restart
Overtemperature
(controller junction)
TJ > 130°C
Odd skip non switch Auto
Restart
External protection
enable
VAE < 0.4 V
Non switch Auto Restart
Brownout
VBO_ref < 0.9 V and last for 30 ~ 60 µs
Non switch Auto Restart
Application Note
Protection Mode
8
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Circuit diagram
5
Figure 3
Circuit diagram
Schematic of DEMO-3AR2280JG
Application Note
9
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Circuit diagram
Note:
1.
2.
3.
4.
5.
General guideline for layout design of Printed Cirduit Board (PCB):
Star ground at bulk capacitor C13: all primary grounds should be connected to the ground of bulk capacitor
C13 seperately in one point. It can reduce the switching noise going into the sensitive pins of CoolSET™ device
effectively. The primary star ground can be split into five groups as follows,
i. Signal ground includes all small signal grounds connecting to the CoolSET™ GND pin such as filter
capacitor ground C17, C18, C19 and opto-coupler ground.
ii. VCC ground includes the VCC capacitor ground C16 and the auxiliary winding ground, pin 5 of the
power transformer.
iii. Current Sense resistor ground includes current sense resistor R14 and R14A.
iv. EMI return ground includes Y capacitor C12.
v. DC ground from bridge rectifier, BR1
Filter capacitor close to the controller ground: Filter capacitors, C17, C18 and C19 should be placed as close to
the controller ground and the controller pin as possible so as to reduce the switching noise coupled into the
controller.
High voltage traces clearance: High voltage traces should keep enough spacing to the nearby traces.
Otherwise, arcing would incur.
i. 400 V traces (positive rail of bulk capacitor C13) to nearby trace: > 2.0 mm
ii. 600V traces (drain voltage of CoolSET™ IC11) to nearby trace: > 2.5 mm
Recommended minimum 232mm2 copper area at drain pin to add on PCB for better thermal performance.
Power loop area (bulk capacitor C13, primary winding of the transformer TR1 (Pin 1 and 3), IC11 Drain pin,
IC11 CS pin and current sense resistor R14/R14A) should be as small as possible to minimize the switching
emission.
Application Note
10
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2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
PCB layout
6
PCB layout
6.1
Top side
Figure 4
Top side component legend
Figure 5
Bottom side copper and component legend
Application Note
11
Revision 2.0
2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Bill of material
7
Bill of material
Table 3
Bill of material (V0.3)
No.
Designator
Description
Part Number
Manufacturer
1
BR1
600V/1A
S1VBA60
Shindengen
1
2
C11
0.22µF/305V
B32922C3224K000
Epcos
1
3
C12
2.2nF/500V
DE1E3RA222MA4BQ
Murata
1
4
C13
68µF/450V
450BXC68MEFC18X25
Rubycon
1
5
C15
1nF/600V/1206
GRM31A7U2J102JW31D
Murata
1
6
C16
22µF/50V
50PX22MEFC5X11
Rubycon
1
7
C17, C19
100nF/50V/0603
GRM188R71H104KA93D
Murata
2
8
C18, C26
1nF/50V/0603
GRM1885C1H102GA01D
Murata
2
9
C22
1000uF/16V
16ZLH1000MEFC10X16
Rubycon
1
10
C24
680uF/16V
16ZLH680MEFC8X16
Rubycon
1
11
C25
220nF/50V
GRM188R71H224KAC4D
Murata
1
12
D11
0.8A/600V
D1NK60
Shindengen
1
13
D12
0.5A/200V
GL34D
1
14
D21
30A/100V
STPS30M100SFP
1
15
F1
1A/250V
36911600000
1
16
HS1
Heat sink for D21
577202B00000G
17
IC11
ICE3AR2280JG(DSO-16/12)
ICE3AR2280JG
18
IC12
SFH617A-3(DIP-4)
SFH617A-3
19
IC21
TL431BVLPG(T0-92)
TL431BVLPG
20
L11
47mH/0.5A
B82731M2501A030
Epcos
1
21
L21
2.2uH/4.3A
744 746 202 2
Wurth Electronics
1
22
R11
330k/2W/500V
PR02000203303JR500
23
R12
10Ω/0603
24
R14
2Ω/0.33W/1206
ERJ8BQF2R0V
1
25
R14A
1.8Ω/0.33W/1206
ERJ8BQF1R8V
1
26
R15
2.7MΩ/1%/500V/1206
HV732BTTD2704F
1
27
R15A
1MΩ/1%/500V/1206
HV732BTTD1004F
1
28
R15B
0Ω/1206
29
R16
41kΩ/1%/0603
30
R22
820Ω/0603
1
31
R23
1.2kΩ/0603
1
32
R24
68kΩ/0603
1
33
R25
38kΩ/1%/0603
1
34
R26
10kΩ/1%/0603
35
TR1
EE20/10/6
750343019
36
Test point
BBA,FBB,CS,Drain,Vcc,Gnd
5003(6pcs)
37
VAR
Varistor
B72207S2271K101
Epcos
1
38
(L N), (+12V Com)
Connector
691102710002(WE)
Wurth Electronics
2
Application Note
Quantity
1
Infineon
1
1
1
1
1
1
CRCW060341K0FKEA
1
1
12
Wurth Electronics
1
1
Revision 2.0
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Transformer construction
8
Transformer construction
Core and material: EE20/10/6(EF20), TP4A (TDG)
Bobbin: 14-Pins, THT, horizontal version (070-5643)
Primary Inductance: LP = 346 µH (±10%), measured between pin 1 and pin 3
Manufacturer and part number: Wurth Electronics Midcom (750343019)
Figure 6
Start
Stop
No. of turns
Wire size
3
14
2
12
27
9
1XAWG#28
1 x Litz TIW(7 X AWG#31)
1
Layer
2
1
27
1XAWG#28
1
6
5
12
1XAWG#28
/2 Primary
Secondary
/2 Primary
Auxiliary
Transformer structure
Application Note
13
Revision 2.0
2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Test results
9
Test results
9.1
Efficiency, regulation and output ripple
Table 4
Efficiency, regulation & output ripple
Input
(VAC/Hz)
85 VAC/60 Hz
115 VAC/60 Hz
230 VAC/50 Hz
282 VAC/50 Hz
Application Note
Pout
(W)
Efficiency
(η) (%)
37.82
1.80
82.12
0.38
11.78
4.50
84.04
11.99
0.75
14.31
8.99
85.40
16.08
11.99
1.13
16.58
13.49
83.89
21.71
11.99
1.50
20.00
17.99
82.84
0.04822
11.99
0.00
32.71
2.20
11.99
0.15
37.96
1.80
81.75
5.33
11.99
0.38
12.22
4.50
84.36
10.38
11.99
0.75
14.09
8.99
86.63
15.72
11.99
1.13
16.53
13.49
85.81
21.10
11.99
1.50
19.56
17.99
85.24
0.07263
11.99
0.00
34.52
2.23
11.99
0.15
44.93
1.80
80.65
5.47
11.99
0.38
11.87
4.50
82.20
10.39
11.99
0.75
14.58
8.99
86.55
15.55
11.99
1.13
16.58
13.49
86.74
20.68
11.99
1.50
18.89
17.99
86.97
0.08808
11.99
0.00
35.56
2.27
11.99
0.15
48.58
1.80
79.23
5.61
11.99
0.38
11.20
4.50
80.15
10.48
11.99
0.75
14.76
8.99
85.81
15.60
11.99
1.13
17.69
13.49
86.47
20.65
11.99
1.50
19.78
17.99
87.09
Pin
(W)
Vout
(VDC)
Iout
(A)
VOutRPP
(mV)
0.04392
11.99
0.00
31.52
2.19
11.99
0.15
5.35
11.99
10.53
14
Average
η (%)
OLP Pin
(W)
OLP Iout
(A)
23.11
1.59
22.95
1.62
23.79
1.73
24.70
1.79
84.04
85.51
85.62
84.88
Revision 2.0
2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Test results
Figure 7
Efficiency vs AC line input voltage
Figure 8
Efficiency vs output power at 115 VAC and 230 VAC line
Application Note
15
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Test results
9.2
Figure 9
Standby power
Standby power at no load vs AC line input voltage (measured by Yokogawa WT210 power
meter - integration mode)
9.3
Figure 10
Line regulation
Line regulation Vout at full load vs AC line input voltage
Application Note
16
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18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Test results
9.4
Load regulation
Figure 11
Load regulation Vout vs output power
9.5
Maximum input power
30
Pin=23.83±3.67% W
23.11
Iout=1.69±5.92% A
23.79
22.95
24.70
7
5
20
1.59
1.73
1.62
1.79
10
3
1
85
115
230
Peak Output Current (A)
Peak Input Power(OLP) [ W ]
Peak input power(OLP)/Peak output current versus AC line input voltage
264
AC Line Input Voltage [ VAC ]
Peak Input Power
Figure 12
Peak Output Current
Maximum input power (before over-load protection) vs AC line input voltage
9.6
ESD immunity (EN61000-4-2)
Pass EN61000-4-2 Special Level (±16 kV for both contact and air discharge).
9.7
Surge immunity (EN61000-4-5)
Pass EN61000-4-5 Installation class 4 (±2 kV for line to line and ±4 kV for line to earth).
Application Note
17
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2016-04-15
18W 12V SMPS Demo Board with ICE3AR2280JG
AN-DEMO-3AR2280JG
Test results
9.8
Conducted emissions (EN55022 class B)
The conducted EMI was measured by Schaffner (SMR25503) and followed the test standard of EN55022 (CISPR
22) class B. The demo board was set up at maximum load (18 W) with input voltage of 115 VAC and 230 VAC.
Figure 13
Conducted emissions(Line) at 115 VAC and maximum Load
Figure 14
Conducted emissions(Neutral) at 115 V AC and maximum Load
Application Note
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Test results
Figure 15
Conducted emissions(line) at 230 VAC and maximum Load
Figure 16
Conducted emissions(Neutral) at 230 V AC and maximum Load
Pass conducted emissions EN55022 (CISPR 22) class B with 10 dB margin for quasi peak limit.
Application Note
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Test results
9.9
Thermal measurement
The thermal test of open frame demo board was done using an infrared thermography camera (TVS-500EX) at
ambient temperature 25°C. The measurements were taken after two hours running at full load.
Table 5
Hottest temperature of demo board
No.
Major component
85 VAC (°C)
1
IC11 (ICE3AR2280JG)
71.1
62.8
2
R14 (current sense resistor)
54.5
42.7
3
TR1 (transformer)
56.2
59.7
4
BR1 (bridge diode)
56.2
36.4
5
R11(clamper resistor)
45.5
43.2
6
L11 (EMI choke)
74.9
35.3
7
D21 (secondary diose)
49.1
48.8
8
Ambient
25
Figure 17
282 VAC (°C)
25
85 VAC full load and 25⁰C ambient
282 VAC full load and 25⁰C ambient
PCB top side
PCB top side
PCB bottom side
PCB bottom side
Infrared thermal image of DEMO-3AR2280JG
Application Note
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AN-DEMO-3AR2280JG
Waveforms and scope plots
10
Waveforms and scope plots
All waveforms and scope plots were recorded with a TELEDYNELECROY 606Zi oscilloscope.
10.1
Startup at low/high AC line input voltage with maximum load
Entry/exit burst
power selection
Entry/exit burst
power selection
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
: Drain voltage (VD)
: Supply voltage (VVCC)
: Feedback voltage (VFBB)
: BBA voltage (VBBA)
Startup time at 85 VAC & maximum load ≈ 420 ms
Figure 18
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
: Drain voltage (VD)
: Supply voltage (VVCC)
: Feedback voltage (VFBB)
: BBA voltage (VBBA)
Startup time at 282 VAC & maximum load ≈ 420 ms
Startup
10.2
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
Soft start
: Current sense voltage (VCS)
: Supply voltage (VVCC)
: Feedback voltage (VFBB)
: BBA voltage (VBBA)
Softstart time at 85 VAC and maximum load ≈ 10 ms
Figure 19
Application Note
Startup
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Waveforms and scope plots
10.3
C1 (Yellow)
F1 (Yellow)
Frequency jittering
: Drain voltage (VDrain)
: Frequency track of C1
Frequency jittering at 85 VAC and maximum load ≈ 94 kHz ~ 102 kHz, Jitter period is ≈ 4 ms
Figure 20
10.4
C1 (Yellow)
C2 (Purple)
Frequency jittering
Drain and current sense voltage at maximum load
: Drain voltage (VDrain)
: Current sense voltage (VCS)
VDrain_peak at 85 VAC ≈ 299 V
Figure 21
Application Note
C1 (Yellow)
C2 (Purple)
: Drain voltage (VDrain)
: Current sense voltage (VCS)
VDrain_peak at 282 VAC ≈ 577 V
Drain and current sense voltage at maximum load
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Waveforms and scope plots
10.5
Load transient response (Dynamic load from 10% to 100%)
C1 (Yellow)
: Output ripple voltage (Vout)
C2 (Purple)
: Output current (Iout)
Vripple_pk_pk at 85 VAC ≈ 130 mV
(Load change from 10% to 100% at 85 VAC,100 Hz,0.4
A/μs slew rate)
Probe terminal end with decoupling capacitor of 0.1
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
Figure 22
10.6
C1 (Yellow)
C2 (Purple)
Load transient response
Output ripple voltage at maximum load
: Output ripple voltage (Vout)
: Output current (Iout)
Vripple_pk_pk at 85 VAC ≈ 21 mV
Probe terminal end with decoupling capacitor of 0.1
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
Figure 23
Application Note
C1 (Yellow)
: Output ripple voltage (Vout)
C2 (Purple)
: Output current (Iout)
Vripple_pk_pk at 85 VAC ≈ 140 mV
(Load change from10% to 100% at 282 VAC,100 Hz,0.4
A/μs slew rate)
Probe terminal end with decoupling capacitor of 0.1
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
C1 (Yellow)
C2 (Purple)
: Output ripple voltage (Vout)
: Output current (Iout)
Vripple_pk_pk at 282 VAC ≈ 21 mV
Probe terminal end with decoupling capacitor of 0.1
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
Output ripple voltage at maximum load
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18W 12V SMPS Demo Board with ICE3AR2280JG
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Waveforms and scope plots
10.7
C1 (Yellow)
C2 (Purple)
Output ripple voltage at burst mode 1 W load
: Output ripple voltage (Vout)
: Output current (Iout)
C1 (Yellow)
C2 (Purple)
: Output ripple voltage (Vout)
: Output current (Iout)
Vripple_pk_pk at 85 VAC ≈ 48 mV
Vripple_pk_pk at 282 VAC ≈ 36 mV
Probe terminal end with decoupling capacitor of 0.1
Probe terminal end with decoupling capacitor of 0.1
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
μF(ceramic) and 1 μF(Electrolytic), 20 MHz filter
Figure 24
Output ripple voltage at burst mode 1 W load
10.8
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
Active burst mode
: Current sense voltage (VCS)
: Supply voltage (VVCC)
: Feedback voltage (VFBB)
: BBA voltage (VBBA)
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
: Current sense voltage (VCS)
: Supply voltage (VVCC)
: Feedback voltage (VFBB)
: BBA voltage (VBBA)
Condition to enter burst: VFB < 1.42 V and last for 20 ms Condition to leave burst: VFB > 4.5 V
(load change form full load to 1 W load at 85 VAC)
(load change form 1W load to full load at 85 VAC)
Figure 25
Application Note
Active burst mode
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Waveforms and scope plots
10.9
VCC over voltage protection (Odd skip auto restart mode)
VCC OVP 2
C1 (Yellow)
: Drain voltage (VD)
C2 (Purple)
: Supply voltage (VVCC)
C2 (Blue)
: Feedback voltage (VFBB)
C2 (Green)
: BBA voltage (VBBA)
Condition to enter VCC over voltage protection: VCC > 25.5 V (VCC OVP 2)
VCC > 20.5 V and VFB > 4.5 V and during soft start (VCC OVP 1)
(Short the diode of optocoupler(Pin 1 and 2 of IC12) during system operating at no load and 85 VAC)
Figure 26
VCC overvoltage protection
10.10
Over load protection (Odd skip auto restart mode)
extended blanking
Built-in20 ms blanking
C1 (Yellow)
: Drain voltage (VD)
C2 (Purple)
: Supply voltage (VVCC)
C2 (Blue)
: Feedback voltage (VFBB)
C2 (Green)
: BBA voltage (VBBA)
Condition to enter over load protection: VFBB > 4.5 V, last for 20 ms and extended blanking time
(output load change from 1.5 A to 2 A at 85 VAC)
Figure 27
Application Note
Over load protection
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Waveforms and scope plots
10.11
VCC under voltage/Short optocoupler protection (Auto restart mode)
C1 (Yellow)
: Drain voltage (VD)
C2 (Purple)
: Supply voltage (VVCC)
C2 (Blue)
: Feedback voltage (VFBB)
C2 (Green)
: BBA voltage (VBBA)
Condition to enter VCC under voltage protection: VCC < 10.5 V
(short the transistor of optocoupler(Pin 3 and 4 of IC12) during system operating at full load and release at 85
VAC)
Figure 28
10.12
VCC under voltage/short optocoupler protection
External protection enable (Non switch auto restart mode)
C1 (Yellow)
: Drain voltage (VD)
C2 (Purple)
: Supply voltage (VVCC)
C2 (Blue)
: Feedback voltage (VFBB)
C2 (Green)
: BBA voltage (VBBA)
Condition to enter external protection enable: VBBA < 0.4 V
(short BBA pin to Gnd by 10Ω resistor during system operating at full load and 85 VAC)
Figure 29
Application Note
External protection enable
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Waveforms and scope plots
10.13
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
Brownout Mode (Non switch auto restart mode)
: Bulk voltage(Vbulk)
: Supply voltage (VVCC)
: Current sense voltage (VCS)
: BBA voltage (VBBA)
Condition to enter brownout: VBBA < 0.9 V (brownin:
VBBA > 0.9 V )
Brownout: Vbulk ≈ 120 VDC (85 VAC)
Brownin : Vbulk ≈ 100 VDC (70 VAC)
(gradually increase AC line voltage at full load till
system start and reduce line till brownout enter)
Figure 30
Application Note
C1 (Yellow)
C2 (Purple)
C2 (Blue)
C2 (Green)
: Bulk voltage(Vbulk)
: Supply voltage (VVCC)
: Current sense voltage (VCS)
: BBA voltage (VBBA)
Condition to enter brownout: VBBA < 0.9 V (brownin:
VBBA>0.9 V )
Brownout: Vbulk ≈ 120 VDC (85 VAC)
Brownin : Vbulk ≈ 80 VDC (58 VAC)
(gradually increase AC line voltage at no load till
system start and reduce line till brownout enter)
Brownout mode
27
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AN-DEMO-3AR2280JG
References
11
References
[1]
ICE3AR2280JG datasheet, Infineon Technologies AG
[2]
AN-PS0044-CoolSET F3R80 DIP-7 brownout/input OVP and frequency jitter version design guide-V1.5
Revision History
Major changes since the last revision
Page or Reference
--
Application Note
Description of change
First release.
28
Revision 2.0
2016-04-15
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Edition 2016-04-15
Published by
Infineon Technologies AG
81726 Munich, Germany
©ANDEMO_201510_PL21_003owners.
2016 Infineon Technologies AG.
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ANDEMO_201510_PL21_003
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