100W 18V Evaluation board using ICE3BR0665JF

Application Note, V1.2, Aug 2010
A N - E V A L 3 B R 0 6 6 5 JF
100W 18V SMPS Evaluation Board with
CoolSET® F3R ICE3BR0665JF
Power Management & Supply
N e v e r
s t o p
t h i n k i n g .
Edition 2010-08-11
Published by Infineon Technologies Asia Pacific,
168 Kallang Way,
349253 Singapore, Singapore
© Infineon Technologies AP 2008.
All Rights Reserved.
Attention please!
The information herein is given to describe certain components and shall not be considered as a guarantee
of characteristics.
Terms of delivery and rights to technical change reserved.
We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement,
regarding circuits, descriptions and charts stated herein.
Information
For further information on technology, delivery terms and conditions and prices please contact your nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements components may contain dangerous substances. For information on the types
in question please contact your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in life-support devices or systems with the express
written approval of Infineon Technologies, if a failure of such components can reasonably be expected to
cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or
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100W 18V Demo board using ICE3BR0665JF on board
Revision History:
2010-08-11
Previous Version:
V1.1
V1.2
Page
Subjects (major changes since last revision)
1, 5, 10
Change demo board name to EVAL3BR0665JF
®
100W 18V SMPS Evaluation Board with CoolSET F3R ICE3BR0665JF:
License to Infineon Technologies Asia Pacific Pte Ltd
Kyaw Zin Min
Kok Siu Kam Eric
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AN-PS0020
100W 18V Demo board using ICE3BR0665JF on board
Table of Contents
Page
1
Abstract..........................................................................................................................................5
2
Evaluation Board...........................................................................................................................5
3
List of Features .............................................................................................................................6
4
Technical Specifications ..............................................................................................................6
5
Circuit Diagram .............................................................................................................................7
6
6.1
6.2
PCB Layout ....................................................................................................................................9
Component side component legend ...............................................................................................9
Solder side copper & component legend ........................................................................................9
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
Circuit Description ......................................................................................................................10
Introduction....................................................................................................................................10
Line Input.......................................................................................................................................10
Start up..........................................................................................................................................10
Operation mode ............................................................................................................................10
Soft start ........................................................................................................................................10
RCD clamper circuit ......................................................................................................................10
Peak current control of primary current.........................................................................................10
Output Stage .................................................................................................................................11
Feedback and regulation...............................................................................................................11
Blanking Window for Load Jump...................................................................................................11
Active Burst Mode .........................................................................................................................11
Jitter mode.....................................................................................................................................11
Protection modes ..........................................................................................................................12
8
Component List ...........................................................................................................................13
9
Transformer Construction..........................................................................................................14
10
10.1
10.2
10.3
10.4
10.5
10.6
Test Results .................................................................................................................................15
Efficiency .......................................................................................................................................15
Input Standby Power .....................................................................................................................16
Line Regulation .............................................................................................................................17
Load Regulation ............................................................................................................................18
Max. Overload Output Power........................................................................................................18
Conducted EMI..............................................................................................................................19
11
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
11.11
Waveforms and Scope Plots......................................................................................................20
Start up at Low and High AC Line Input Voltage and 100W load .................................................20
Drain to Source Voltage and Current during 100W load Operation..............................................20
Load Transient Response (Load jump from 10% to 100% Load).................................................21
AC Output Ripple during 100W.....................................................................................................21
Active Burst Mode at 0.5W load....................................................................................................22
Vcc overvoltage protection – Auto Restart....................................................................................23
Over load protection – Auto Restart..............................................................................................24
Open loop protection – Auto Restart.............................................................................................24
Vcc under voltage protection/Short opto-coupler – Auto Restart..................................................25
External Auto restart enable..........................................................................................................25
Frequency Jittering........................................................................................................................26
12
References ...................................................................................................................................27
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
1 Abstract
This document is an engineering report that describes a universal input power supply designed in an 18V
®1
100W off line flyback converter that utilizes the IFX F3R CoolSET ICE3BR0665JF. The application board is
operated in discontinuous conduction mode (DCM) and running at 67 kHz switching frequency. It has one
output voltage with secondary side control regulation. It is especially suitable for AC/DC power supply such
as LCD monitors, adapters for printers and notebook computers, DVD players and recorder, Blue-Ray DVD
player and recorder, set-top boxes and industrial auxiliary power supplies. The ICE3BR0665JF is a current
®
mode control PWM integrated with CoolMOS . With the 650V startup cell, active burst mode and BiCMOS
technologies, the standby power can be <100mW at no load and Vin = 265Vac. The frequency jitter mode
and the soft gate drive can give a low EMI performance. The built-in 20ms blanking window and the
extendable blanking time concept can prevent the IC from entering the auto restart mode due to over load
protection unintentionally. The outstanding propagation delay compensation feature can allow a very precise
current limit between low line and high line. The IC provides auto-restart protection mode for Vcc overvoltage, over temperature, over load, open loop, Vcc under-voltage, short opto-coupler. In case it needs
customer defined protection, the external auto restart enable feature can fulfill the requirement.
2 Evaluation Board
Figure 1 – EVAL3BR0665JF
This document contains the list of features, the power supply specification, schematic, bill of material and the
transformer construction drawing. Typical operating characteristics and performance curves with scope
waveforms are presented at the rear of the report.
1
®
®
CoolSET is a trade mark of Infineon which is a PWM control IC integrated with CoolMOS in one package.
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
3 List of Features
®
650V avalanche rugged CoolMOS with built-in Startup Cell
Active Burst Mode for lowest Standby Power
Fast load jump response in Active Burst Mode
67 kHz internally fixed switching frequency
Auto Restart Protection Mode for Over-load, Open Loop, Vcc Undervoltage, Over-temperature & Vcc
Over-voltage
Built-in Soft Start
Built-in blanking window with extendable blanking time for short duration high current
External auto-restart enable
Max Duty Cycle 75%
Overall tolerance of Current Limiting < ±5%
Internal PWM Leading Edge Blanking
BiCMOS technology provides wide VCC range
Built-in Frequency jitter feature and soft driving for low EMI
4 Technical Specifications
Input voltage
85VAC~265VAC
Input frequency
50Hz, 60Hz
Input Standby Power
< 100mW @ no load; < 1W @ 0.5W load
Output voltage and current
18V +/- 2%
Output current
5.56A
Output power
100W
Average Efficiency
>85% at 115Vac & 230Vac
Output ripple voltage @ 100W load
< 100mVp-p
Application Note
6
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Application Note
N
VAR1
S10K275
C2
0.33uF/275V
7
EMI 1
2 x 15mH, 2.3A
*RT1
C5 0.1uF
C1
0.22uF/275V
R4
0.27R
IC3
C9 100pF
R3
0.56R
5 GND
6 FB
C8
1nF
4 Vcc
D1
UF4005
C7
0.1uF
1 DRAIN
C3
270uF/400V
3 BA ICE3BR0665JF
2 CS
BR1
KBU6G
R1
33k/2W
100W 18V SMPS Demoboard with ICE3BR0665JF(V0.3)
Eric Kok/ 13 Mar 2009
85V - 265Vac
L
+
+
4A F1
Z1
22V
R2a
100R
R2
10R
2
IC1 SFH617A-3
1
10R
R11
R7
1.1K
IC2
TL431
750R
R6
2200uF/25V
R5
130k
L1
C14 +
R9
62k 1%
220uF/35V
1.5uH
R8
10k 1%
R10
0R
C10 +
2200uF25V
C12 68nF
*R8a
2200uF/25V
C15 +
C11 10pF
MBR20H150CT C13
+
D3
2.2nF
C17
TR1
LP=130uH
3
CY1
4
D2
1N4148
C6
22uF/35V
C4
10nF/1kV
2.2nF/250V,Y1
COM
18V/5.56A
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100W 18V Demo board using ICE3BR0665JF on board
5 Circuit Diagram
Figure 2 – 100W 18V ICE3BR0665JF power supply Schematic
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100W 18V Demo board using ICE3BR0665JF on board
®
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, C5, C7, C8 and opto-coupler ground.
•
Vcc ground includes the Vcc capacitor ground, C6 and the auxiliary winding ground pin of the
power transformer.
•
Current Sense resistor ground includes current sense resistor R3 and R4.
•
EMI return ground includes Y capacitor, CY1.
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
6 PCB Layout
6.1
Component side component legend
Figure 3 – Component side Component Legend – View from Component Side
6.2
Solder side copper & component legend
Figure 4 – Solder side copper – View from Component Side
Application Note
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7 Circuit Description
7.1
Introduction
The EVAL3BR0665JF demo board is an off line flyback switch mode power supply (SMPS) using the
®
ICE3BR0665JF integrated power IC from the Infineon CoolSET F3R family. The circuit, shown in Figure 2,
details an 18V, 100W power supply that operates from an AC line input voltage range of 85Vac to 265Vac,
suitable for applications requiring either an open frame supply or an enclosed adapter.
7.2
Line Input
The AC input side comprises the input fuse F1 as over-current protection. The conducted EMI choke EMI1,
X-capacitors C1 and C2 and Y-capacitor CY1 act as electromagnetic interference suppressors. A varistor
VAR1 is added to absorb the line transient surge voltage while a NTC, RT1 is added to reduce the inrush
surge current during start up. A rectified DC voltage (120V ~ 374V) is obtained through the bridge rectifier
BR1 and the input bulk capacitor C3.
7.3
Start up
Since there is a built-in startup cell in the ICE3BR0665JF, there is no need for external start up resistor. The
startup cell is connecting the drain pin of the IC. Once the voltage is built up at the Drain pin of the
ICE3BR0665JF, the startup cell will charge up the Vcc capacitor C6 and C7. When the Vcc voltage exceeds
the UVLO at 18V, the IC starts up. Then the Vcc voltage is bootstrapped by the auxiliary winding to sustain
the operation.
7.4
Operation mode
During operation, the Vcc pin is supplied via a separate transformer winding with associated rectification D2
and buffering and filtering capacitors C5 and C6. Resistor R2 is used for current limiting. In order not to
exceed the maximum voltage at Vcc pin, external zener diode Z1 and resistor R2a is added to clamp the
voltage.
7.5
Soft start
The Soft-Start time is built-in 20ms. After the Vcc hits UVLO at 18V, it starts the soft-start phase.
7.6
RCD clamper circuit
®
While turns off the CoolMOS , the clamper circuit R1, C4 and D1 absorbs the current caused by transformer
leakage inductance once the voltage exceeds clamp capacitor voltage. Finally drain to source voltage of
®
1
®
CoolMOS is lower than maximum break down voltage (V(BR)DSS = 650V ) of CoolMOS .
7.7
Peak current control of primary current
®
The CoolMOS drain source current is sensed via external shunt resistors R3 and R4 which determine the
tolerance of the current limit control. Since ICE3BR0665JF 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, propagation delay compensation is implemented to
ensure the maximum input current/power can be controlled in an even tighter manner. The demo board
shows app. +/-2% (refer to Figure 13).
1
V(BR)DSS = 650V @ Tj = 110°C
Application Note
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7.8
100W 18V Demo board using ICE3BR0665JF on board
Output Stage
The power is coupled to the secondary side through an ultra fast recovery diode D3. The capacitor C10, C13
and C15 provide energy buffering and the cascading LC filter L1 and C14 is used to reduce the output
voltage ripple. The capacitor C10, C13 and C15 are selected to have a low internal resistance (ESR) to
minimize the output voltage ripple.
7.9
Feedback and regulation
The output voltage is controlled by a TL431 reference control IC (IC2). This device incorporates the voltage
reference as well as the error amplifier. Compensation network C11, C12, R5, R8, R8a, R9 and R10
constitutes the loop compensation circuit. 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 R6 and R7. Opto-coupler IC2 is used to
transmit the control signal to the “Feedback” input of the ICE3BR4765JF device. The selected opto-coupler
should meet DIN VDE 884 requirements for a wider creepage distance.
7.10 Blanking Window for Load Jump
In case of Load Jumps the Controller provides a Blanking Window before activating the Over Load
Protection and entering the Auto Restart Mode. There are 2 modes for the blanking time setting; basic mode
and the extendable mode. If there is no capacitor added to the BA pin, it would fall into the basic mode; i.e.
the blanking time is set at 20ms. If a longer blanking time is required, a capacitor, C5 can be added to BA pin
to extend it. The extended time can be achieved by an internal 13uA constant current at BA pin to charge C5
from 0.9V to 4.0V. Thus the overall blanking time is the addition of 20ms and the extended time. For
example, C5 (external capacitor at BA pin) = 0.1uF, IBK (internal charging current) = 13uA
Blanking time (total) = 20ms + C5 X (4-0.9)/IBK = 43.9ms
Note: A filter capacitor (e.g. 68nF (min. value)) may be needed to add to the BA pin if the noises cannot be
avoided to enter that pin in the physical PCB layout. Otherwise, some protection features may be mistriggered and the system may not be working properly.
7.11 Active Burst Mode
At light load condition, the SMPS enters into Active Burst Mode. At this stage, the controller is always active
but the VCC must be kept above the switch off threshold; i.e. VCCoff ≥ 10.5V. During active burst mode, the
efficiency increases significantly and at the same time it supports low ripple on VOUT and fast response on
load jump. When the voltage level at FB falls below 1.25V, the internal blanking timer starts to count. When it
reaches the built-in 20ms blanking time, it will enter Active Burst Mode. The Blanking Window is generated to
avoid sudden entering of Burst Mode due to load jump.
During Active Burst Mode the current sense voltage limit is reduced from 1V to 0.25V 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 0.45mA. At burst mode, the FB voltage is
changing like a saw-tooth between 3.0 and 3.6V. To leave Burst Mode, FB voltage must exceed 4.5V. It will
reset the Active Burst Mode and turn the SMPS into Normal Operating Mode. The maximum current; i.e.
current sense voltage limit resume to 1V, can then be provided to stabilize VOUT.
7.12 Jitter mode
The ICE3BR0665JF has frequency jittering feature to reduce the EMI noise. The jitter frequency is internally
set at 67 kHz (+/-2.7 kHz) and the jitter period is set at 4ms.
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
7.13 Protection modes
Protection is one of the major factors to determine whether the system is safe and robust. Therefore,
sufficient protection is a must. ICE3BR0665JF provides all the necessary protections to ensure the system is
operating safely. The protections include Vcc over-voltage, over-temperature, over-load, open loop, Vcc
under-voltage, short opto-coupler, etc. 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 re-start 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.
Protection function
Failure condition
Vcc Over-voltage
1. Vcc > 25.5V & last for 120µs or
2. Vcc > 20.5V & FB > 4.5V & during soft start period
Auto Restart
Over-temperature
(controller junction)
TJ > 130°C
Auto Restart
Over-load / Open loop
VFB > 4.5V and VBA > 4.0V
(Blanking time counted from charging VBA from 0.9V to
4.0V )
Auto Restart
Vcc Under-voltage / short
Opto-coupler
Vcc < 10.5V
Auto Restart
Auto-restart enable
VBA < 0.33V
Auto Restart
Application Note
Protection Mode
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8 Component List
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Application Note
Circuit code
BR1
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C17
CY1
D1
D2
D3
EMI1
FUSE1
FB1
IC1
IC2
IC3
J1 ~ J4
L1
R1
R2
R2a
R3
R4
R5
R6
R7
R8
R8A
R9
R10
R11
VAR1
TR1
Z1
Part Type
KBU6G 6A 400V
0.22µF, 275V
0.33µF, 275V
270µF, 400V
10n, 1kV
0.1µF, 63V
22µF, 35V
0.1µF, 63V
1nF, 63V
100pF, 1kV
2200µF, 25V
270pF, 63V
220nF, 63V
2200µF, 25V
220µF, 35V
2200µF, 25V
2.2nF, 100V
2.2nF, 250V
UF4005
UF4003
MBR20H150CT
2X15mH, 2.3A
4A 250V
Ferrite Bead
SFH617-2
TL431
ICE3BR0665JF
Jumper
1.5µH
33K, 2W
0R
100R, 1/4W
0.51R, 1%, 1W
0.27R, 1%, 1W
130K, 1/4W
240R, 1/4W
1k1, 1/4W
560k, 1%, 1/4W
22k, 1%, 1/4W
100k, 1%, 1/4W
33k, 1%, 1/4W
10R,1/4W
S10K 275V
ER35L,BH1/N67, Lp=130µH
24V zener
13
Quantity
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
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100W 18V Demo board using ICE3BR0665JF on board
9 Transformer Construction
Core and material: EER35L, BH1 or N67
Bobbin: ER35L (12 pin) Vertical Version
Primary Inductance, Lp = 130 uH+3%, measured between pin 5 and pin 6 (Gapped to Inductance)
Transformer structure:
Figure 5 – Transformer structure and top view of transformer complete
Wire size requirement:
Start
Stop
No. of turns
Wire size
layer
4
6
13
3 x AWG#27
½ Primary
7,8
9,10
5
7 X AWG#25
Secondary
1
2
4
20 X AWG#33
Auxiliary
5
4
13
3 x AWG#27
½ Primary
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
10 Test Results
10.1 Efficiency
Active-Mode Efficiency versus AC Line Input Voltage
90.00
Efficiency [ % ]
88.00
86.5
85.8
86.00
84.0
84.00
86.2
86.8
87.1
86.6
86.3
180
230
87.0
85.8
85.0
82.00
82.3
80.00
85
115
150
265
AC Line Input Voltage [ Vac ]
Full load Efficiency
Average Efficiency(25%,50%,75% & 100%)
Figure 6 – Efficiency vs. AC Line Input Voltage
Efficiency versus Output Power
95.00
Efficiency [ % ]
85.00
84.2
80.00
87.2
86.6
86.0
90.00
86.2
85.8
50
75
87.1
85.0
72.6
75.00
70.00
65.00
64.4
60.00
0
25
100
Output Power [ W ]
Vin=115Vac
Vin=230Vac
Figure 7 – Efficiency vs. Output Power @ 115Vac and 23OVac
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
10.2 Input Standby Power
Stanby Power @ no-load versus AC Line Input Voltage
100
Input Power [ mW ]
84.30
96.60
80
67.70
61.60
60
52.10
56.20
40
85
115
150
180
230
265
AC Line Input Voltage [ Vac ]
Po = 0W
Figure 8 – Input Standby Power @ no load vs. AC Line Input Voltage
(Equipment: Yokogawa WT210 power meter – using integration mode)
Standby Pow e r @ 0.5W load versus AC Line Input Voltage
Input Power [ W ]
1.10
0.90
0.68
0.69
85
115
0.72
0.75
0.78
0.79
0.70
0.50
0.30
150
180
230
265
AC Line Input Voltage [ Vac ]
Po=0.5W
Figure 9 – Input Standby Power @ 0.5W load versus AC Line Input Voltage
(Equipment: Yokogawa WT210 power meter – using integration mode)
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
Standby Pow er Efficiency @ 0.5W & 0.3W load versus AC Line Input Voltage
80
73.39
75
72.65
Efficiency [ % ]
69.82
70
67.02
64.44
63.62
230
265
65
60
55
50
85
115
150
180
AC Line Input Voltage [ Vac ]
Pout=0.5W
Figure 10 – Standby Power Efficiency @ 0.5W load versus AC Line Input Voltage
10.3 Line Regulation
O utpu t V o ltage [ V ]
Line Regulation : Output Voltage @ Full Load versus AC Line Input Voltage
18.50
18.04
18.04
18.04
18.04
18.04
18.04
85
115
150
180
230
265
18.00
17.50
AC Line Input Voltage [ Vac ]
Vo @ full load
Figure 11 – Line Regulation vs. AC Line Input Voltage
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
10.4 Load Regulation
Load Regulation: Vout versus Outoput Power
Ouput Voltage [ V ]
18.50
18.07
18.00
18.07
18.07
18.06
18.07
18.05
18.06
18.04
18.05
18.04
17.50
0
25
50
75
100
Output Pow er [ W ]
Output Voltage @ 230Vac
Output Voltage @ 115Vac
Figure 12 – Load Regulation vs. AC Line Input Voltage
10.5 Max. Overload Output Power
Max. Overload Output & Input Pow er ( Peak Pow er ) versus AC Line Input Voltage
Max. O verload Output Pow er [ W ]
Pin=132.33±4.05% & Pout=111.06±1.29%
140
135
130
125
120
115
110
105
100
134.03
137.7
111.97
85
112.51
115
131.23
129
112.33
128
111.43
150
180
AC Line Input Voltage [ V ]
Peak Output Power
126.97
110.52
109.62
230
265
Po_max = 126.65V±1.8%
Peak Input Power
Figure 13 – Overload Output Power (Over Current Shut Off Threshold) vs. AC Line Input Voltage
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
10.6 Conducted EMI
The conducted EMI was measured by Schaffner (SMR4503) and followed the test standard of EN55022
class B. The demo board was set up at maximum load (100W) with input voltage of 115Vac and 230Vac.
80
EN_V_QP
70
EN_V_AV
QP Pre
Pk Pre
AV Pre
60
50
dBµV
40
30
20
10
0
-10
0.1
1
10
100
-20
f / MHz
Figure 14 – Max. Load (100W) with 115 Vac (Line)
80
EN_V_QP
70
EN_V_AV
QP Pre
Pk Pre
AV Pre
60
50
dBµV
40
30
20
10
0
-10
0.1
1
10
100
-20
f / MHz
Figure 15 – Max. Load (100W) with 230 Vac (Line)
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
11 Waveforms and Scope Plots
All waveforms and scope plots were recorded with a LeCroy 6050 oscilloscope
11.1 Start up at Low and High AC Line Input Voltage and 100W load
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Startup time = 0.49s, Soft start time = 20ms
Startup time = 0.48s, Soft start time = 20ms
Figure 16 – Startup @ Vin=85Vac & 100W load
Figure 17 – Startup @ Vin=265Vac & 100W load
11.2 Drain to Source Voltage and Current during 100W load Operation
Channel 1; C1 : Drain Source Voltage (VDS)
Channel 2; C2 : Drain Source Current (IDS)
Channel 1; C1 : Drain Source Voltage (VDS)
Channel 2; C2 : Drain Source Current (IDS)
Duty cycle = 40.6%
Duty cycle = 13%
Figure 18 – Operation @ Vin = 85Vac & 100W load
Figure 19 – Operation @ Vin = 265Vac & 100W
load
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
11.3 Load Transient Response (Load jump from 10% to 100% 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)
Current step slew rate = 0.4A/us
Current step slew rate = 0.4A/us
Figure 20 – Load jump @ Vin=85Vac from 10W to 100W load
Figure 21 – Load jump @ Vin=265Vac from 10W to 100W
load
11.4 AC Output Ripple during 100W
Channel 2; C2 : Output Ripple Voltage (Vo_ripple)
Channel 2; C2 : Output Ripple Voltage (Vo_ripple)
Vo_ripple_pk to pk = 100mV
Vo_ripple_pk to pk = 100mV
Probe Terminal end with decoupling capacitor
0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter
of
Figure 22 – AC output ripple @ Vin=85Vac and 100W load
Application Note
Probe Terminal end with decoupling capacitor of
0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter
Figure 23 – AC output ripple @ Vin=265Vac and 100W load
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100W 18V Demo board using ICE3BR0665JF on board
11.5 Active Burst Mode at 0.5W load
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Current Sense Voltage (VCS)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Blanking time to enter burst mode : appr.20ms
Figure 24 – Active burst mode @ Vin=85Vac and
step from 5.56A to 0.03A
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Current Sense Voltage (VCS)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Blanking time to enter burst mode : appr.20ms
Figure 25 – Active burst mode @ Vin=265Vac
and step from 5.56A to 0.03A
Channel 2; C2 : Output Voltage (Vo)
Channel 2; C2 : Output Voltage (Vo)
Vo_ripple_pk to pk = 50mV
Probe Terminal end with decoupling capacitor of
0.1uF(ceramic) & 10uF(Electrolytic), 20MHz filter
Vo_ripple_pk to pk = 50mV
Probe Terminal end with decoupling capacitor of
0.1uF(Ceramic) & 10uF(Electrolytic), 20MHz filter
Figure 26 – Output ripple at active burst mode @
Vin=85Vac and 0.5W load
Figure 27 – Output ripple at active burst mode @
Vin=265Vac and 0.5W load
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
11.6 Vcc overvoltage protection – Auto Restart
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto restart mode when VCC>20.5V
& VFB >4.5V during soft start period
Figure 28 – Vcc overvoltage protection @
Vin=85Vac; R9 disconnected before system start
up with no load
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto restart mode when VCC>20.5V &
VFB >4V during soft start period
Figure 29 – Vcc overvoltage protection @
Vin=265Vac; R9 disconnected before system start
up with no load
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto restart mode when VCC>25.5V
Figure 30 – Vcc overvoltage protection @
Vin=85Vac; R9 disconnected after system start up
with no load(delete Z1)
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply voltage (VCC)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto restart mode when VCC>25.5V
Figure 31 – Vcc overvoltage protection @
Vin=265Vac; R9 disconnected after system start up
with no load(delete Z1)
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
11.7 Over load protection – Auto Restart
Channel 1; C1 : Output Voltage (VO)
Channel 2; C2 : Output current (IO)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto-restart when VFB>4.5V, VBA >4V
with (built-in+extendable) blanking time (46ms).
Figure 32 – Over load protection with extended
blanking time @ Vin=85Vac; output power step up
from 5.56A to 7A load(C5 = 0.1uF)
Channel 1; C1 : Output Voltage (VO)
Channel 2; C2 : Output current (IO)
Channel 3; C3 : Feedback Voltage (VFB)
Channel 4; C4 : BA voltage (VBA)
System enters auto-restart when VFB>4.5V, VBA
>4V with (built-in+extendable) blanking time
(46ms).
Figure 33 – Over load protection with extended
blanking time @ Vin=265Vac; output power step
up from 5.56A to 7A load(C5 = 0.1uF)
11.8 Open loop protection – Auto Restart
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
System enters auto-restart when VFB>4.5V, VBA >4V
with (built-in+extendable) blanking time.
System enters auto-restart when VFB>4.5V, VBA
>4V with (built-in+extendable) blanking time.
Figure 34 – Open loop protection with extended
blanking time @ Vin=85Vac; R9 disconnected
during system operation at 100W load(C5=0.1µF)
Figure 35 – Open loop protection with extended
blanking time @ Vin=265Vac; R9 disconnected
during system operation at 100W load(C5=0.1µF)
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
11.9 Vcc under voltage protection/Short opto-coupler – Auto Restart
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
System enters Auto Restart mode when Vcc<10.5V
System enters Auto Restart mode when Vcc<10.5V
Figure 36 – Short opto-coupler protection @ Vin=85Vac; Short
the transistor of opto-coupler during system operation.
Figure 37 – Short opto-coupler protection @ Vin=265Vac;
Short the transistor of opto-coupler during system operation.
11.10
External Auto restart enable
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
Channel 1; C1 : Drain Source voltage (VDS)
Channel 2; C2 : Supply Voltage (VCC)
Channel 3; C3 : Feedback voltage (VFB)
Channel 4; C4 : BA Voltage (VBA)
System enters auto restart mode when Vba<0.33V
System enters auto restart mode when Vba<0.33V
Figure 38 – Auto restart enable by trigger BA pin @
Figure 39– Auto restart enable by trigger BA pin @
Vin=265Vac; supply BA pin to 0.2V by function generator
(C5=0.1uF)
Vin=85Vac; supply BA pin to 0.2V by function generator
(C5=0.1uF)
Application Note
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11.11
100W 18V Demo board using ICE3BR0665JF on board
Frequency Jittering
Channel 1; C1 : Drain Source voltage (VDS)
Channel 1; C1 : Drain Source voltage (VDS)
Frequency changing from 63.1kHz ~ 67.1kHz, Jitter
period is set at 4ms internally
Frequency changing from 62.9kHz ~ 67.1kHz,
Jitter period is set at 4ms internally
Figure 40 – Frequency change shown at VDS @ Vin=85Vac
Figure 41 – Frequency change shown at VDS @
and 100W Load
Vin=265Vac and 100W Load
Application Note
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100W 18V Demo board using ICE3BR0665JF on board
12 References
®
[1]
Infineon Technologies, Datasheet “CoolSET -F3R ICE3BR0665JF Off-Line SMPS Current Mode
®
Controller with Integrated 650V CoolMOS and Startup Cell (Frequency Jitter Mode) in FullPak”
[2]
Kok Siu Kam Eric, Kyaw Zin Min, Infineon Technologies, Application Note “ AN-PS0028,
®ICE3BRxx65JF CoolSET F3R (Fullpak) new Jitter version Design Guide”
[3]
Infineon Technologies, Application Note “AN-SMPS-ICE2xXXX-1 CoolSET
Line Switch Mode Power Supply (SMPS)”
Application Note
27
TM
ICE2xXXX for OFF-
2010-08-11
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