GRM188R71H224KAC4D [INFINEON]
12W 5V SMPS evaluation board with ICE3AR4780VJZ;
| 型号： | GRM188R71H224KAC4D |
| 厂家： | 
Infineon |
| 描述： | 12W 5V SMPS evaluation board with ICE3AR4780VJZ 电容器 |
| 文件： | 总25页 (文件大小：2886K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AN-EVAL-3AR4780VJZ
12W 5V SMPS evaluation board with
ICE3AR4780VJZ
Application Note
About this document
Scope and purpose
This document is a 12W 5.0V, universal input off-line flyback converter evaluation board using Infineon
CoolSET™ F3R80 family, ICE3AR4780VJZ.
Intended audience
This document is intended for users of the ICE3AR4780VJZ who wish to design low cost and high reliable
system 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
2
3
4
Abstract .....................................................................................................................3
Evaluation board ........................................................................................................3
Evaluation board specifications....................................................................................4
List of features (ICE3AR4780VJZ) ..................................................................................4
5
Circuit description.......................................................................................................5
Introduction...............................................................................................................................................5
Line input ...................................................................................................................................................5
Line input over voltage protection..........................................................................................................5
Start up.......................................................................................................................................................5
Operation mode ........................................................................................................................................5
Soft start.....................................................................................................................................................5
RCD clamper circuit...................................................................................................................................5
Peak current control of primary current.................................................................................................6
Output stage ..............................................................................................................................................6
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
1
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Abstract
6
Circuit diagram...........................................................................................................7
7
7.1
7.2
PCB layout .................................................................................................................8
Top side......................................................................................................................................................8
Bottom side................................................................................................................................................8
8
9
Component list ...........................................................................................................9
Transformer construction.......................................................................................... 10
10
Test results .............................................................................................................. 11
Efficiency ..................................................................................................................................................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
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
11
Waveforms and scope plots........................................................................................ 18
Start up at low/high AC line input voltage with maximum load ........................................................18
Soft start...................................................................................................................................................18
Frequency jittering..................................................................................................................................19
Drain voltage and current 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 (Auto restart mode)............................................................................................22
VCC under voltage/Short optocoupler protection (Normal auto restart mode)................................23
AC Line input OVP mode.........................................................................................................................23
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
11.12
12
References ............................................................................................................... 24
Revision History........................................................................................................................ 24
Application Note
2
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Abstract
1
Abstract
This document is an engineering report of a universal input 12W 5V off-line flyback converter power supply
utilizing F3R80 CoolSET™ICE3AR4780VJZ. 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
ICE3AR4780VJZ 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, over-load, 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-3AR4780VJZ [Dimensions L x W x H: 95mm x 41mm x 24mm (3.74" x 1.61" x 0.94")]
Application Note
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Evaluation board specifications
3
Evaluation board specifications
Input voltage
85VAC~265VAC
Input frequency
50~60Hz
5V
Output voltage
Output current
Output power
2.4A
12W
Steady state output ripple voltage
(±1% of norminal output voltage)
Vripple_P_P< 50mV
Dynamic load response undershoot & overshoot
(±3% of norminal output voltage)
Vripple_P_P< 250mV
Active mode four point average efficiency
(25%,50%,75% & 100%load) (EU CoC Version 5, Tier 1)
>80% at 115Vac and >79% at 230Vac
Active mode at 10% load efficiency (EU CoC Version 5,
Tier 1)
>73%
No-load power consumption
(EU CoC Version 5, Tier 2)
< 75mW
Maximum input power(Peak Power) for universal input
range (<±5% of average maximum input power)
<±3% of average maximum input power
Form factor case size (L x W x H)
95mm x 41mm x 24mm (3.74" x 1.61" x 0.94")
4
List of features (ICE3AR4780VJZ)
800V avalanche rugged CoolSET™with Startup Cell
Active Burst Mode for lowest Standby Power
Selectable entry and exit burst mode level
100kHz internally fixed switching frequency with jittering feature
Auto Restart Protection for Over load, Open Loop, VCC Under voltage & Over voltage and Over
temperature
Over temperature protection with 50°C hysteresis
Built-in 10ms Soft Start
Built-in 20ms 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 50Ωturn on resistor
Application Note
4
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Circuit description
5
Circuit description
5.1
Introduction
The EVAL-3AR4780VJZ evaluation board is a low cost off-line flyback switch mode power supply (SMPS)
using the ICE3AR4780VJZ integrated power IC from the CoolSET™-F3R80 family. The circuit shown in Figure
3, details a 5V, 12W power supply that operates from an AC line input voltage range of 85Vac to 265Vac and
line input OVP detect/reset voltage is 300/282Vac, 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 L11, X-capacitors
C11, C14 and Y-capacitor C12 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 C13, 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 ICE3AR4780VJZ, 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
ICE3AR4780VJZ, the startup cell will charge up the Vcc capacitor C16 and C17. When the Vcc voltage exceeds
the UVLO at 17V, 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
D12 and buffering C16, 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.
5.6
Soft start
The Soft-Start is a built-in function and is set at 10ms.
5.7
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 clamp capacitor voltage. Finally drain to source
voltage of CoolMOS™ is lower than maximum break down voltage (V(BR)DSS = 800V) of CoolMOS™.
Application Note
5
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Circuit description
5.8
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 ICE3AR4780VJZ 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 ±2.2% 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 D21. The capacitor C22 & C23 provides
energy buffering following with the LC filter L21 and C24 to reduce the output voltage ripple considerably.
Storage capacitors C22 & C23 are selected to have a very small internal resistance (ESR) to minimize the
output voltage ripple.
Application Note
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Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Circuit diagram
6
Circuit diagram
Figure 2
Schematic of EVAL-3AR4780VJZ
Application Note
7
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
PCB layout
N.B. : 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, C17, C18, C19 and opto-coupler ground.
Vcc ground includes the Vcc capacitor ground, C16 and the auxiliary winding ground, pin 2 of the power
transformer.
Current Sense resistor ground includes current sense resistor R14 and R14A.
EMI return ground includes Y capacitor, C12.
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
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Component list
8
Component list
No.
Designator
Component Description
12V Test Point
600V/1A
Footprint
Part Number
Manufacturer
Wurth Electronics
SHINDENGEN
EPCOS
Quantity
1 +5V Com, L N
2 BR1
Connector
1V
691102710002
S1VBA60
B329221C3104K
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
5
1
1
1
1
2
1
2
1
1
1
1
1
1
3 C11
4 C12
5 C13
6 C15
100nF/305V
2.2nF/250V
33uF/450V
1nF/630V
MKT5/18/15
MKT2/13/10
RB16X25
1206
DE1E3KX222MA4BN01F MURATA
450BXC33MEFC16X25 RUBYCON
GRM31A7U2J102JW31D MURATA
50PX22MEFC5X11 RUBYCON
GRM188R71H104KA93D MURATA
GRM1885C1H331GA01D MURATA
10ZLH1000MEFC10X12.5 RUBYCON
10ZLH680MEFC8X11.5
GRM188R71H224KAC4D MURATA
GRM188R71H272KA01D MURATA
7 C16
22uF/50V
RB5.5
8 C17,C19
9 C18
100nF/50V
330pF/50V
1000uF/10V
680uF/10V
220nF/50V
2.7nF/50V
0603
0603
RB10
RB8
0603
0603
10 C22
11 C24
12 C25
13 C26
14 D11
15 D12
16 D21
17 F1
18 HS1
19 IC11
20 IC12
21 IC21
22 J1,J2,J3,J4,R15C Jumper
23 L11
24 L21
25 R11
26 R12
27 R14,R14A
28 R15
29 R15A,R15B
30 R16
31 R22
RUBYCON
600V/0.8A
200V/0.5A
DIODE0.4
1206D
D1NK60
SHINDENGEN
GL34D
45V/30A
300V/1.6A
TO220 heat sink
ICE3AR4780VJZ
SFH617 A3
TL431
TO-220FPAB
MKT4.3/8.4/5
HS TO220
DIP7
STPS30L45CFP
36911600000
577202B00000G
ICE3AR4780VJZ
INFINEON
DIP4
TO92-TL431-
Axial 0.4
EMI_C_U21
CH6 2.5
AXIAL0.4_V 4mm
0603
39mH/0.6A
B82731M2601A030
7447462022
EPCOS
Wurth Electronics
2.2µH/4.3A
150k/2W
18R
2R7/0.33W/1%
3M/1%
3M/1%
43.2k/1%
130R
1206
AXIAL0.4_15
1206
0603
0603
ERJ8BQF2R7V
32 R23
33 R24
34 R25
35 R26
1.2k
0603
150k
0603
20k
20k
AXIAL0.3
0603
36 TR1
37 VAR
571µH(54:4:13)
275V/0.25W
TR_EF20_H
750342411
Wurth Electronics Midcom
EPCOS
1
1
MKT3.5/7.5/5
B72207S2271K101
Application Note
9
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Transformer construction
9
Transformer construction
Core and material: EE20/10/6(EF20), TP4A (TDG)
Bobbin: 070-4989(10-Pins, TH-H, Horizontal version)
Primary Inductance, Lp=571μH (±10%), measured between pin 4 and pin 5
Manufacturer and part number: Wurth Electronics Midcom (750342411)
Figure 5
Transformer structure
Application Note
10
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
10
Test results
VOut_ripple_pk_pk
(mV)
η
(%)
Average η OLP Pin
OLP Iout
(A)
Vin(Vac) Pin(W) Vo(Vdc)
Io(A)
Po(W)
(%)
(W)
0.0288
1.6200
3.8500
7.6200
11.5600
15.6200
0.0306
1.6300
3.8300
7.5700
11.3700
15.2500
0.0425
1.6800
4.0000
7.6800
11.3700
15.0700
0.0494
1.7100
4.1000
7.7500
11.4300
15.1000
5.23
5.21
5.19
5.15
5.11
5.06
5.23
5.21
5.19
5.15
5.11
5.06
5.23
5.21
5.19
5.15
5.11
5.06
5.23
5.21
5.19
5.15
5.11
5.06
0.00
0.24
14.10
25.70
10.70
13.80
15.50
18.40
14.40
26.50
10.70
13.40
15.60
17.10
15.40
24.40
10.60
13.70
16.10
17.20
15.10
24.90
10.00
13.20
16.00
17.30
1.25
3.11
6.18
9.20
12.14
77.19
80.88
81.10
79.57
77.75
0.600
1.200
1.800
2.400
0.00
85
17.85
2.72
2.75
2.85
2.89
79.82
0.24
1.25
3.11
6.18
9.20
12.14
76.71
81.31
81.64
80.90
79.63
0.600
1.200
1.800
2.400
0.00
115
230
265
17.54
17.92
18.33
80.87
0.24
1.25
3.11
6.18
9.20
12.14
74.43
77.85
80.47
80.90
80.58
0.600
1.200
1.800
2.400
0.00
79.95
79.15
0.24
1.25
3.11
6.18
9.20
12.14
73.12
75.95
79.74
80.47
80.42
0.600
1.200
1.800
2.400
10.1
Efficiency
Figure 6
Efficiency vs AC line input voltage
Application Note
11
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
Figure 7
Efficiency vs output power @ 115Vac and 230V 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
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Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
10.3
Line regulation
Figure 9
Line regulation Vo @ full load vs AC line input voltage
10.4
Load regulation
Figure 10 Load regulation Vo vs output power
Application Note
13
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
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 [special level (±18kV) for contact discharge].
10.7
Surge immunity (EN61000-4-5)
Pass [Installation class 3, 2kV (line to earth) and 1kV (line to line)].
Application Note
14
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
10.8
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 evaluation board was set up at maximum load (12W) with input voltage of 115Vac
and 230Vac.
Figure 12 Conducted emissions(Line) at 115Vac and maximum Load
Figure 13 Conducted emissions(Neutral) at 115Vac and maximum Load
Application Note 15
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
Figure 14 Conducted emissions(line) at 230Vac and maximum Load
Figure 15 Conducted emissions(Neutral) at 230Vac and maximum Load
Pass conducted EMI EN55022 (CISPR 22) class B with > 7dB margin for QP.
Application Note
16
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12W 5V SMPS evaluation board with ICE3AR4780VJZ
Test results
10.9
Thermal measurement
The thermal test of open frame evaluation board was done using an infrared thermography camera (TVS-
500EX) at ambient temperature 25⁰C. The measurements were taken after two hours running at full load
(12W).
No. Major component
85Vac (°C) 115Vac (°C) 230Vac (°C) 265Vac (°C)
1
2
3
4
5
IC11 (ICE3AR4780VJZ) 57.5
50.7
40.2
39.1
51.4
54
49.9
33.6
32.3
53.3
54.5
50.7
33.1
31.6
53.9
54.9
BR1
L11
TR1
D21
46.9
44.0
51.5
54.2
85Vac, 12W load, 25⁰C ambient
115Vac, 12W load, 25⁰C ambient
230Vac, 12W load, 25⁰C ambient
265Vac, 12W load, 25⁰C ambient
Figure 16 Infrared thermal image of EVAL-ICE3AR4780VJZ
Application Note
17
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11
Waveforms and scope plots
All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope
11.1
Start up at low/high AC line input voltage with maximum load
377ms
377ms
Entry/exit
burst
selection
Entry/exit
burst
selection
Channel 1; C1 : Drain voltage (VDrain
)
Channel 1; C1 : Drain voltage (VDrain)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
)
)
Startup time = 377ms
Startup time = 377ms
Figure 17 Startup @ 85Vac & max. load
Figure 18 Startup @ 265Vac & max. load
11.2
Soft start
9.8ms
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
)
Soft Star time = 9.8ms
Figure 19 Soft start @ 85Vac & max. load
Application Note
18
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11.3
Frequency jittering
Channel 2; C2 : Drain voltage (VDrain
)
Channel F2 : Frequency track of C2
Frequency jittering from 92 kHz ~ 100 kHz, Jitter
period is set at 4ms internally
Figure 20 Frequency jittering@ 85Vac and
max. load
11.4
Drain voltage and current at maximum load
Channel 1; C1 : Drain voltage (VDrain
)
Channel 1; C1 : Drain voltage (VDrain)
Channel 2; C2 : Current sense voltage (VCS)
Channel 2; C2 : Current sense voltage (VCS)
VDrain_peak = 284V
VDrain_peak = 573V
Figure 21 Operation @ 85Vac and max. load
Figure 22 Operation @ 265Vac and max. load
Application Note
19
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11.5
Load transient response (Dynamic load from 10% to 100%)
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Vripple_pk_pk=220mV (Load change from10% to
Vripple_pk_pk=220mV (Load change from10% to
100%,100Hz,0.4A/μS slew rate)
100%,100Hz,0.4A/μS slew rate)
Probe terminal end with decoupling capacitor of
Probe terminal end with decoupling capacitor of
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
Figure 23 – Load transient response @ 85Vac Figure 24 Load transient response @ 265Vac
11.6
Output ripple voltage at maximum load
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Vripple_pk_pk=16mV
Vripple_pk_pk = 16mV
Probe terminal end with decoupling capacitor of
Probe terminal end with decoupling capacitor of
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
Figure 25 AC output ripple @ 85Vac and max. Figure 26 AC output ripple @ 265Vac and
load max. load
Application Note
20
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11.7
Output ripple voltage during burst mode at 1 W load
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Channel 1; C1 : Output ripple voltage (Vo)
Channel 2; C2 : Output current (Io)
Vripple_pk_pk=25mV
Vripple_pk_pk = 18mV
Probe terminal end with decoupling capacitor of
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
Probe terminal end with decoupling capacitor of
0.1μF(ceramic) & 1μF(Electrolytic), 20MHz filter
Figure 27 AC output ripple @ 85Vac and 1W
load
Figure 28 AC output ripple @ 265Vac and 1W
load
11.8
Active Burst mode operation
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
Condition: VFB<1.27V & last for 20ms
)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
Condition: VFB>4.5V
)
(load change form full load to 0.5W load)
Figure 29 Entering active burst mode @
85Vac
(load change form 0.5W load to full load)
Figure 30 Leaving active burst mode @ 85Vac
Application Note
21
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11.9
Vcc over voltage protection (Odd skip auto restart mode)
VCC OVP2
VCC OVP1
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
)
Channel 4; C4 : BV voltage (VBV)
Condition: VCC>20.5 & last for 150µs
VCC>20.5 & VFB>4.5V & during soft start
& last for 30µs
(J4 disconnected during system operating at no load)
Figure 31 Vcc overvoltage protection @ 85Vac
11.10
Over load protection (Auto restart mode)
built-in 20ms blanking
extended blanking
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
)
Channel 4; C4 : BV voltage (VBV)
Condition: VFB>4.5V & last for 20ms & VBV>4.5V &
last for 30µs
(output load change from 2.4 to 3A)
Figure 32 Over load protection with built-
in+extended blanking time
@85Vac
Application Note
22
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
Waveforms and scope plots
11.11
VCC under voltage/Short optocoupler protection (Normal auto restart
mode)
Exit autorestart
Enter autorestart
Channel 1; C1 : Current sense voltage (VCS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback voltage (VFBB
Channel 4; C4 : BV voltage (VBV)
Condition: VCC<10.5V
)
(short the transistor of optocoupler during system
operating @ full load and release)
Figure 33 Vcc under voltage/short
optocoupler protection @ 85Vac
11.12
AC Line input OVP mode
421Vdc(298Vac)
Enter input OVP
403Vdc(285Vac)
Exit input OVP
401Vdc(283Vac)
Exit input OVP
421Vdc(298Vac)
Enter input OVP
Channel 1; C1 : Bulk voltage(Vbulk
)
Channel 1; C1 : Bulk voltage(Vbulk)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Current sense voltage (VCS)
Channel 4; C4 : BV voltage (VBV)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Current sense voltage (VCS)
Channel 4; C4 : BV voltage (VBV)
Condition: VBV>1.98V & last for 400µs (OVP detect)
VBV<1.91V & last for 5µs (OVP reset)
Condition: VBV>1.98V & last for 400µs (OVP detect)
VBV<1.91V & last for 5µs (OVP reset)
(gradually increase AC line voltage until OVP detect
and decrease AC line until OVP reset)
(gradually increase AC line voltage until OVP detect
and decrease AC line until OVP reset)
Figure 34 Input OVP mode at max. load
Figure 35 Input OVP mode at no load
condition
condition
Application Note
23
Revision 1.2, 2015-05-12
12W 5V SMPS evaluation board with ICE3AR4780VJZ
References
12
References
[1] Infineon Technologies, Datasheet “CoolSET™-F3R80 ICE3AR4780VJZ Off-Line SMPS Current Mode
Controller with integrated 800V CoolMOS™and Startup cell( input OVP & Frequency Jitter) in DIP-7”
[2] Infineon Technologies, AN-PS0044-CoolSET F3R80 DIP-7 brownout/input OVP & frequency jitter version
design guide-V1.5
Revision History
Major changes since the last revision
Page or Reference Description of change
5
Add section 5.3 under circuit description
Application Note
24
Revision 1.2, 2015-05-12
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