34W 12V SMPS Evaluation Board with ICE3AR1080VJZ

AN - EVAL IC E3AR108 0 VJZ
3 4 W 12 V SMPS Ev alu ati on Board wi th
IC E3AR1080VJZ
Application Note
About this document
Scope and purpose
This document is an engineering report that describes universal input 34 W 12 V off-line flyback converter
power supply using Infineon CoolSET™ F3R80 family, ICE3AR1080VJZ. The converter is operated in
Discontinuous Conduction Mode, 100 kHz fixed frequency, very low standby power and various mode of
protections for a high reliable system. This evaluation board is designed to evaluate the performance of
ICE3AR1080VJZ in ease of use.
Intended audience
This document is intended for users of the ICE3AR1080VJZ who wish to design low cost and high reliable
systems of off-line SMPS for enclosed adapter or open frame auxiliary power supply of white goods, PC,
server, DVD, TV, Set-top box, etc.
Table of Contents
About this document ................................................................................................................... 1
Table of Contents ........................................................................................................................ 1
1
Abstract ..................................................................................................................... 3
2
Evaluation board ........................................................................................................ 3
3
Specifications of evaluation board ................................................................................ 4
4
Features of ICE3AR1080VJZ .......................................................................................... 4
5
5.1
5.2
5.3
5.4
5.5
5.6
Circuit description....................................................................................................... 5
Introduction ............................................................................................................................................... 5
Line input ................................................................................................................................................... 5
Line input over voltage protection .......................................................................................................... 5
Start up ....................................................................................................................................................... 5
Operation mode ........................................................................................................................................ 5
Soft start ..................................................................................................................................................... 5
1
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Abstract
5.7
5.8
5.9
RCD clamper circuit................................................................................................................................... 5
Peak current control of primary current................................................................................................. 6
Output stage .............................................................................................................................................. 6
6
Circuit diagram ........................................................................................................... 7
7
7.1
7.2
PCB layout ................................................................................................................. 8
Top side ...................................................................................................................................................... 8
Bottom side................................................................................................................................................ 8
8
Bill of material (BOM) .................................................................................................. 9
9
Transformer construction .......................................................................................... 10
10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
Test results .............................................................................................................. 11
Efficiency, regulation and output ripple ...............................................................................................11
Standby power ........................................................................................................................................12
Line regulation.........................................................................................................................................13
Load regulation .......................................................................................................................................13
Maximum power......................................................................................................................................14
ESD immunity (EN61000-4-2) .................................................................................................................14
Surge immunity (EN61000-4-5)..............................................................................................................14
Conducted emissions (EN55022 class B) ..............................................................................................15
Thermal measurement ...........................................................................................................................17
11
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
Waveforms and scope plots ........................................................................................ 18
Startup at low/high AC line input voltage with maximum load .........................................................18
Soft start ...................................................................................................................................................18
Frequency jittering ..................................................................................................................................19
Drain and current sense voltage at maximum load ............................................................................19
Load transient response (Dynamic load from 10% to 100%) .............................................................20
Output ripple voltage at maximum load ..............................................................................................20
Output ripple voltage during burst mode at 1 W load ........................................................................21
Active Burst mode operation .................................................................................................................21
VCC over voltage protection (Odd skip auto restart mode) .................................................................22
Over load protection (Odd skip Auto restart mode) ............................................................................22
VCC under voltage/Short optocoupler protection (Normal auto restart mode) ................................23
AC Line input OVP mode .........................................................................................................................23
12
References ............................................................................................................... 24
Revision History........................................................................................................................ 24
Application Note
2
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Abstract
1
Abstract
This document is an engineering report of a universal input 34 W 12 V off-line flyback converter power
supply utilizing F3R80 CoolSET™ ICE3AR1080VJZ. The application evaluation board is operated in
Discontinuous Conduction Mode (DCM) and is running at 100 kHz switching frequency. It has a single output
voltage with secondary side control regulation. It is especially suitable for small power supply such as DVD
player, set-top box, game console, charger and auxiliary power of white goods, server, PC and high power
system, etc. The ICE3AR1080VJZ is the latest version of the CoolSET™. 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 fault (VCC over voltage, VCC under voltage, adjustable input OVP, over temperature, overload, open loop and short opto-coupler), it also has the BiCMOS technology design, selectable entry and exit
burst mode level, adjustable AC line input over voltage protection feature, built-in soft start time, built-in
and extendable blanking time and frequency jitter feature, etc. The particular features are the best-in-class
low standby power and the good EMI performance.
2
Evaluation 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
EVAL ICE3AR1080VJZ
Application Note
3
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Specifications of evaluation board
3
Table 1
Specifications of evaluation board
Specifications of EVAL ICE3AR1080VJZ
Input voltage
85 VAC ~ 265 VAC
Input frequency
50 ~ 60 Hz
Output voltage
12 V
Output current
2.83 A
Output power
34 W
Steady state output ripple voltage
(±1% of norminal output voltage)
Vripple_P_P < 50 mV
Dynamic load response undershoot and overshoot
(±3% of norminal output voltage)
Vripple_P_P < 610 mV
> 85% at 115 VAC and 230 VAC
Active mode four point average efficiency
(25%,50%,75% and 100%load)
Active mode at 10% load efficiency
> 70%
No-load power consumption
(EU CoC Version 5, Tier 2)
< 75 mW
Maximum input power(Peak Power) for universal input
range (< ±5% of average maximum input power)
< ±5% of average maximum input power
4
Table 2
Features of ICE3AR1080VJZ
Features of ICE3AR1080VJZ
800 V avalanche rugged CoolMOS™ with startup cell
Active Burst Mode for lowest standby power
Selectable entry and exit burst mode level
100 kHz internally fixed switching frequency with jittering feature
Auto restart protection for over load, open Loop, VCC under voltage and over voltage and over
temperature
Over temperature protection with 50 °C hysteresis
Built-in 10 ms soft start
Built-in 20 ms and extendable blanking time for short duration peak power
Propagation delay compensation for both maximum load and burst mode
Adjustable input OVP
Overall tolerance of current limiting < ±5%
BiCMOS technology for low power consumption and wide VCC voltage range
Soft gate drive with 50 Ω turn-on resistor
Application Note
4
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Circuit description
5
Circuit description
5.1
Introduction
The EVAL ICE3AR1080VJZ evaluation board is a low cost off-line flyback switch mode power supply (SMPS)
using the ICE3AR1080VJZ integrated power IC from the CoolSET™-F3R80 family. The circuit shown in Figure
2 details a 12 V, 34 W power supply that operates from an AC line input voltage range of 85 VAC to 265 VAC and
line input OVP detect/reset voltage is 300/282 VAC, suitable for applications in enclosed adapter or open
frame auxiliary power supply for different system such as white goods, PC, server, DVD, LED TV, Set-top box,
etc.
5.2
Line input
The AC line input side comprises the input fuse F1 as over-current protection. The choke L1, X-capacitors C1,
C2 and Y-capacitor C16 act as EMI suppressors. Optional spark gap device SG1, SG2 and varistor VAR can
absorb high voltage stress during lightning surge test. After the bridge rectifier BR1 and the input bulk
capacitor C3, a voltage of 90 to 424 VDC is present which depends on input line voltage.
5.3
Line input over voltage protection
The AC line input OVP mode is detected by sensing the voltage level at BV pin through the resistors divider
from the bulk capacitor. Once the voltage level at BV pin hits above 1.98V, the controller stops switching and
enters into input OVP mode. When the BV voltage drops to 1.91V and the Vcc hits 17V, the input OVP mode is
released.
5.4
Start up
Since there is a built-in startup cell in the ICE3AR1080VJZ, 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
ICE3AR1080VJZ, the startup cell will charge up the VCC capacitor C11 and C7. When the VCC voltage exceeds
the UVLO at 17 V, the IC starts up. Then the VCC voltage is bootstrapped by the auxiliary winding to sustain
the operation.
5.5
Operation mode
During operation, the VCC pin is supplied via a separate transformer winding with associated rectification D2
and buffering C11 and C7.In order not to exceed the maximum voltage at VCC pin due to poor coupling of
transformer winding, an external zener diode ZD1 can be added.
5.6
Soft start
The soft start is a built-in function and is set at 10 ms.
5.7
RCD clamper circuit
While turns off the CoolMOS™, the clamper circuit C14, R16 and D1 absorbs the current caused by
transformer leakage inductance once the voltage exceeds clamp capacitor voltage. Finally drain to source
voltage of CoolMOS™ is lower than maximum break down voltage (V(BR)DSS = 800 V) of CoolMOS™.
Application Note
5
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Circuit description
5.8
Peak current control of primary current
The CoolMOS™ drain source current is sensed via external shunt resistors R1 and R2 which determine the
tolerance of the current limit control. Since ICE3AR1080VJZ is a current mode controller, it would have a
cycle-by-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
evaluation board shows approximately ± 4.1% of average maximum input power (refer to Figure 11).
5.9
Output stage
On the secondary side the power is coupled out by a schottky diode D3. The capacitors C8 and C9 provide
energy buffering following with the LC filter L2 and C10 to reduce the output voltage ripple considerably.
Storage capacitors C8, C9 and C10 are selected to have a very small internal resistance (ESR) to minimize the
output voltage ripple.
Application Note
6
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Circuit diagram
6
Circuit diagram
Figure 2
Schematic of EVAL ICE3AR1080VJZ
Application Note
7
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
PCB layout
Note: In order to get the optimized performance of the CoolSET™, the grounding of the PCB layout must be
connected very carefully. From the circuit diagram above, it indicates that the grounding for the
CoolSET™ can be split into several groups; signal ground, VCC ground, Current sense resistor ground and
EMI return ground. All the split grounds should be connected to the bulk capacitor ground separately.
Signal ground includes all small signal grounds connecting to the CoolSET™ GND pin such as filter
capacitor ground C7, C6, C5 and opto-coupler ground.
VCC ground includes the VCC capacitor ground C11 and the auxiliary winding ground, pin 2 of the power
transformer.
Current Sense resistor ground includes current sense resistor R1 and R2.
EMI return ground includes Y capacitor C16.
7
PCB layout
7.1
Top side
Figure 3
Top side component legend
7.2
Bottom side
Figure 4
Bottom side copper and component legend
Application Note
8
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Bill of material (BOM)
8
Bill of material (BOM)
Table 3
Bill of materials
No.
Designator
1
CN1,CN2
2
Component
Footprint
Part Number
Manufacturer
12V Test point
Connector
691101710002
Wurth Electronics
2
BR1
600V/2A
Bridge(2S)
D2SB60A
SHINDENGEN
1
3
C1,C2
MKT/220nF/305V
L*W*H:12.5*7*18-P15mm
B32922C3224M
EPCOS
2
4
C10
16V/330u
Φ*H :8*11.5-P3.5mm
16YXF330MEFC10x20
RUBYCON
1
5
C11
22uF/50V
Φ*H:5*11-P2.5mm
50PX22MEFC5X11
RUBYCON
1
6
C14
1N/630V
W*L*H: 7.3*12.5*6.5-P5mm
B32529C8102K000
EPCOS
1
7
C16
Y1/3.3nF/400Vac
L*W*H:9*5*10-P10mm
8
C17,C18,C20
16V/4U7
1206
9
C3
120uF/450V
Φ*H:18*31.5-P7.5.5mm
10
C5
50V/220N
0805
1
11
C6
50V/470pF
0805
1
12
C7
50V/100N
0805
1
13
C12
50V /1nF
0805
1
14
C8,C9
16V/1000uF
Φ*H :10*20-P5mm
15
R1
1.0R
1206
1
16
R2
1.0R
1206
1
17
C13
50V/220N
0805
1
18
R10
1K4
0805
1
19
R12
20K
0805
2
20
R17
0R
0805
1
21
R7 ,R11
0R
1206
2
22
R13
820R
0805
1
23
R14
1K1
0805
1
24
R15
330K
0805
1
25
R16
33K/2W
DIP-2W
1
26
R19
3M
R-1/4W-P15(0.8)
1
27
R4,R5
3.01M
1206
2
28
R6
43.2K
0805
1
29
R8
3R3
0805
1
30
R9
75K
0805
31
D1
1000V/1A
DO-41
UF4007
1
32
D2
200V/0.2A
DO-35
IN485B
1
33
F1
250Vac/2A
Φ*H:8.5*7.5-P5mm
34
IC1
ICE3AR1080VJZ
PG-DIP7
ICE3AR1080VJZ
35
IC2
SFH617-3
DIP-4
SFH617 A3
1
36
IC3
TL431
SOT-23
TL431
1
37
L1
30mH/0.8A
38
JP1
Jumper
DIP-P6.5mm
1
39
JP2
Jumper
DIP-P4mm
1
40
JP3
Jumper
DIP-P6mm
1
Application Note
Description
Quantity
1
450CXW120MEFC18X31
16ZL1000MEFC10X20
MURATA
3
RUBYCON
1
RUBYCON
2
1
1
750342718
9
INFINEON
Wurth Electronics
1
1
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Transformer construction
41
NTC
Jumper
DIP-P5mm
42
L2
1uH/5A
Φ*H:7.8*9-P5mm
744772010
Wurth Electronics
1
43
VAR
VR /S07K460
W*L*H: 9*5.7*11.5-P5mm
B72207S461K101
Epcos
1
44
TR1
250uH(48:8:10)
DIP10(EF25)
750342657
Wurth Electronics
1
45
D3
100V/20A
TO-220AB
V20100C
46
HS1
9
1
1
1
Transformer construction
Core and material: EE25/13/7(EF25), TP4A (TDG)
Bobbin: 070-4846(10-Pins, TH-T, Vertical version)
Primary Inductance, LP=250 µH (±5%), measured between pin 4 and pin 5
Manufacturer and part number: Wurth Electronics Midcom (750342657)
Figure 5
Transformer structure
Application Note
10
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
10
Test results
10.1
Efficiency, regulation and output ripple
Table 4
Vin
(VAC)
85
115
230
265
Figure 6
Efficiency, regulation and output ripple
Pin
(W)
Vout
(VDC)
Iout
(A)
Vout_ripple_pk_pk
(mV)
Pout
(W)
Efficiency (η)
(%)
0.0390
12.13
0.00
35.8
4.2700
12.13
0.28
10.0080
12.13
0.71
11.5
3.43
80.42
14.1
8.58
19.9500
12.13
85.71
1.41
21.1
17.15
85.99
30.1440
40.7520
12.13
2.12
23.7
25.73
85.35
12.12
2.83
38
34.32
84.22
0.0460
12.13
0.00
37.8
4.2810
12.13
0.28
11.5
3.43
80.21
10.0050
12.13
0.71
16.6
8.57
85.62
19.7040
12.13
1.41
21.1
17.15
87.06
29.6230
12.13
2.12
24.6
25.73
86.86
39.7080
12.12
2.83
27.5
34.32
86.43
0.0630
12.14
0.00
42.9
4.7000
12.13
0.28
12.2
3.43
73.06
10.5000
12.13
0.71
15.7
8.57
81.59
19.9700
12.13
1.41
19.2
17.15
85.90
29.5080
12.13
2.12
24.6
25.73
87.21
39.1830
12.12
2.83
25.6
34.32
87.59
0.0690
12.14
0.00
46.1
4.8640
12.13
0.28
12.2
3.43
70.60
10.6750
12.13
0.71
16.6
8.57
80.25
20.2380
12.13
1.41
18.6
17.15
84.76
29.8520
12.13
2.12
24.3
25.73
86.20
39.5120
12.12
2.83
30
34.31
86.83
Average η
(%)
OLP Pin
(W)
OLP Iout
(A)
52.9
3.71
54.19
3.82
56.35
4.04
57.42
4.11
85.32
86.49
85.57
84.51
Efficiency vs AC line input voltage
Application Note
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Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
Figure 7
Efficiency vs output power @ 115 VAC and 230 VAC line
10.2
Standby power
Figure 8
Standby power @ no load vs AC line input voltage (measured by Yokogawa WT210 power
meter - integration mode)
Application Note
12
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
10.3
Line regulation
Figure 9
Line regulation Vout @ full load vs AC line input voltage
10.4
Load regulation
Figure 10
Load regulation Vout vs output power
Application Note
13
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
10.5
Maximum power
Figure 11
Maximum input power (before over-load protection) vs AC line input voltage
10.6
ESD immunity (EN61000-4-2)
Pass [level 3 (±6 kV) for contact discharge].
Pass [special level (±12 kV) for contact discharge by adding SG1 and SG2 (RLS302-301M)].
10.7
Surge immunity (EN61000-4-5)
Pass [Installation class 3, 2 kV (line to earth) and 1 kV (line to line)].
Pass [Installation class 4, 4 kV (line to earth) and 2 kV (line to line) by adding SG1 and SG2 (RLS302-301M)].
Application Note
14
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
10.8
Conducted emissions (EN55022 class B)
The conducted EMI was measured by certified external lab and followed the test standard of EN55022
(CISPR 22) class B. The evaluation board was set up at maximum load (34 W) with input voltage of 115 VAC
and 230 VAC.
Figure 12
Conducted emissions(Line) at 115 VAC and maximum Load
Figure 13
Conducted emissions(Neutral) at 115 VAC and maximum Load
Application Note
15
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
Figure 14
Conducted emissions(line) at 230 VAC and maximum Load
Figure 15
Conducted emissions(Neutral) at 230 VAC and maximum Load
Pass conducted EMI EN55022 (CISPR 22) class B with > 6 dB margin for QP.
Application Note
16
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Test results
10.9
Thermal measurement
The thermal test of open frame evaluation board was done using an infrared thermography camera (TVS500EX) at ambient temperature 25 ⁰C. The measurements were taken after two hours running at full load
(34 W).
Table 5
Hottest temperature of evaluation board
No. Designator
Temperature @ 85 VAC and FL(°C)
Temperature @ 265 VAC and FL(°C)
1
IC1 (ICE3AR1080VJZ)
88.3
81.9
2
BR1
56.2
37.4
3
L1
73.6
37.2
4
TR1
55.4
62
5
D3
59.1
68.4
6
R16
47.3
45.2
7
Ambient
25
25
85 VAC full load and 25 ⁰C ambient
265 VAC full load and 25 ⁰C ambient
PCB top side
PCB top side
PCB bottom side
PCB bottom side
Figure 16
Infrared thermal image of EVAL ICE3AR1080VJZ
Application Note
17
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11
Waveforms and scope plots
All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope.
11.1
Startup at low/high AC line input voltage with maximum load
406 ms
406 ms
Entry/exit
burst
selection
Entry/exit
burst
selection
Channel 1; C1(Yellow) : Drain voltage (VDrain)
Channel 1; C1(Yellow) : Drain voltage (VDrain)
Channel 2; C2( Red): Supply voltage (VCC)
Channel 2; C2( Red): Supply voltage (VCC)
Channel 3; C3(Blue) : Feedback voltage (VFBB)
Channel 3; C3(Blue) : Feedback voltage (VFBB)
Channel 4; C4(Green) :BV voltage (VBV)
Channel 4; C4(Green) :BV voltage (VBV)
Startup time @ 85 VAC & max. load = 406 ms
Startup time @ 265 VAC & max. load = 406 ms
Figure 17
Startup
11.2
Soft start
9.3 ms
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB)
Channel 4; C4 : Zero crossing voltage (VBV)
Soft Star time @ 85 VAC & max. load = 9.3 ms
Figure 18
Soft start
Application Note
18
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11.3
Frequency jittering
Channel 1; C1(Yellow) : Drain voltage (VDrain)
Channel F1 : Frequency track of C1
Frequency jittering from 90 kHz ~ 98 kHz, Jitter period is set at 4 ms internally
Figure 19
Frequency jittering @ 85 VAC and max. load
11.4
Drain and current sense voltage at maximum load
Channel 1; C1 : Drain-source voltage (VDS)
Channel 1; C1 : Drain-source voltage (VDS)
Channel 2; C2 : Current sense voltage (VCS)
Channel 2; C2 : Current sense voltage (VCS)
VDrain_peak @ 85 VAC = 285 V
VDrain_peak @ 265 VAC = 570 V
Figure 20 Drain and current sense voltage at max. load
Application Note
19
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11.5
Load transient response (Dynamic load from 10% to 100%)
Channel 1; C1 : Output ripple voltage (Vout)
Channel 1; C1 : Output ripple voltage (Vout)
Channel 2; C2 : Output current (Iout)
Channel 2; C2 : Output current (Iout)
Vripple_pk_pk @ 85 VAC =610 mV (Load change
from10% to 100%, 100 Hz,0.4 A/μS slew rate)
Vripple_pk_pk @ 265 VAC =609 mV (Load change
from10% to 100%, 100 Hz,0.4A/μS slew rate)
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Figure 21
Load transient response
11.6
Output ripple voltage at maximum load
Channel 1; C1 : Output ripple voltage (Vout)
Channel 1; C1 : Output ripple voltage (Vout)
Channel 2; C2 : Output current (Iout)
Channel 2; C2 : Output current (Iout)
Vripple_pk_pk @ 85 VAC 38 mV
Vripple_pk_pk @ 265 VAC = 35 mV
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Figure 22
AC output ripple at max. load
Application Note
20
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11.7
Output ripple voltage during burst mode at 1 W load
Channel 1; C1 : Output ripple voltage (Vout)
Channel 1; C1 : Output ripple voltage (Vout)
Channel 2; C2 : Output current (Iout)
Channel 2; C2 : Output current (Iout)
Vripple_pk_pk @ 85 VAC = 59 mV
Vripple_pk_pk @ 265 VAC = 70 mV
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Probe terminal end with decoupling capacitor of
0.1 μF(ceramic) and 1 μF(Electrolytic), 20 MHz
filter
Figure 23
AC output ripple at 1 W load
11.8
Active Burst mode operation
Channel 1; C1 : Current sense voltage (VCS)
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB)
Channel 3; C3 : Feedback voltage (VFBB)
Channel 4; C4 :BV voltage (VBV)
Condition to enter burst: VFB<1.27 V and last for 20
ms
(load change form full load to 1 W load)
Figure 24 Active burst mode at 85 VAC
Application Note
Channel 4; C4 :BV voltage (VBV)
Condition to leave burst: VFB>4.5 V
(load change form 1 W load to full load)
21
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34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11.9
VCC over voltage protection (Odd skip auto restart mode)
VCC OVP2
VCC OVP1
Channel 1; C1 : Drain voltage (VDrain)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB)
Channel 4; C4 : BV voltage (VBV)
Condition: VCC>25.5 V
VCC>20.5 V and VFB>4.5 V and during soft start
(Short the diode of optocoupler(Pin 1 and 2 of IC2) during system operating at no load)
Figure 25 VCC overvoltage protection at 85 VAC
11.10
Over load protection (Odd skip Auto restart mode)
built-in 20ms blanking
extended blanking
Channel 1; C1(Yellow) : Drain voltage (VDrain)
Channel 2; C2( Red): Supply voltage (VCC)
Channel 3; C3(Blue) : Feedback voltage (VFBB)
Channel 4; C4(Green) :BV voltage (VBV)
Condition: VFB>4.5 V and last for 20 ms andVBV>4.5 V
(output load change from 2.83 A to 4 A)
Figure 26
Over load protection with built-in+extended blanking time at 85 VAC
Application Note
22
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
Waveforms and scope plots
11.11
VCC under voltage/Short optocoupler protection (Normal auto restart
mode)
Exit autorestart
Enter autorestart
Channel 1; C1(Yellow) : Drain voltage (VDrain)
Channel 2; C2( Red): Supply voltage (VCC)
Channel 3; C3(Blue) : Feedback voltage (VFBB)
Channel 4; C4(Green) :BV voltage (VBV)
Condition: VCC<10.5 V
(short the transistor of optocoupler(Pin 3 and 4 of IC2) during system operating @ full load and release)
Figure 27
VCC under voltage/short optocoupler protection at 85 VAC
11.12
AC Line input OVP mode
413Vdc(292Vac)
Enter input OVP
418Vdc(295Vac)
Enter input OVP
389Vdc(275Vac)
Exit input OVP
396Vdc(280Vac)
Exit input OVP
Channel 1; C1(Yellow) : Bulk voltage(Vbulk)
Channel 1; C1(Yellow) : Bulk voltage(Vbulk)
Channel 2; C2(Red) : Supply voltage (VCC)
Channel 2; C2(Red) : Supply voltage (VCC)
Channel 3; C3(Blue : Current sense voltage (VCS)
Channel 3; C3(Blue : Current sense voltage (VCS)
Channel 4; C4 (Green): BV voltage (VBV)
Channel 4; C4 (Green): BV voltage (VBV)
Max. load condition: VBV>1.98 V and last for 400 µs
(OVP detect)
VBV<1.91 V and last for 5µs
(OVP reset)
(gradually increase AC line voltage until OVP detect
and decrease AC line until OVP reset)
No load condition: VBV>1.98 V and last for 400 µs
(OVP detect)
VBV<1.91 V and last for 5 µs
(OVP reset)
(gradually increase AC line voltage until OVP detect
and decrease AC line until OVP reset)
Figure 28
Input OVP
Application Note
23
Revision 1.0, 2015-05-12
34 W 12 V SMPS Evaluation Board with ICE3AR1080VJZ
References
12
References
[1]
Infineon Technologies, Datasheet “CoolSET™-F3R80 ICE3AR1080VJZ Off-Line SMPS Current Mode
Controller with integrated 800V CoolMOS™and Startup cell( input OVP and Frequency Jitter) in DIP-7”
[2]
Infineon Technologies, 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
24
Revision 1.0, 2015-05-12
Trademarks of Infineon Technologies AG
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muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc.
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Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.
Last Trademarks Update 2011-11-11
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Edition 2015-05-12
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