Fairchild FSQ500L User manual

© 2011 Fairchild Semiconductor Corporation 1 FEBFSQ500L_H257v1 • Rev. 1.0.1
User Guide for
FEBFSQ500L_H257v1
Evaluation Board
Compact, Green-Mode Controller FSQ500L
5.1V / 400mA Flyback Design
Featured Fairchild Product:
FSQ500L
Direct questions or comments
about this evaluation board to:
“Worldwide Direct Support”
Fairchild Semiconductor.com

© 2011 Fairchild Semiconductor Corporation 2 FEBFSQ500L_H257v1 • Rev. 1.0.1
Table of Contents
1.Introduction............................................................................................................................... 3
1.1. General Description........................................................................................................... 3
1.2. Features.............................................................................................................................. 3
2.Specifications............................................................................................................................ 4
3.Photographs & PCB Layout...................................................................................................... 5
4.Function Test Report................................................................................................................. 6
4.1. Input Current...................................................................................................................... 6
4.2. Input Wattage at No-Load Condition ................................................................................ 7
4.3. Burst Mode Test................................................................................................................. 7
4.4. Soft-Start Test.................................................................................................................... 8
4.5. Turn-On Delay Test........................................................................................................... 9
4.6. DC Output Rising Time..................................................................................................... 9
4.7. Line and Load Regulation................................................................................................ 10
4.8. Efficiency......................................................................................................................... 11
4.9. Output Ripple and Noise.................................................................................................. 11
4.10. Step Load Response....................................................................................................... 12
4.11. Over-Current Protection................................................................................................. 13
4.12. Hold-up Time................................................................................................................. 13
4.13. Short Circuit Protection ................................................................................................. 14
4.14. Maximum Duty Ratio.................................................................................................... 15
4.15. Power Off....................................................................................................................... 15
4.16. Over-Temperature Protection (OTP)............................................................................. 15
4.17. Voltage Stress of Drain and Secondary Rectifier.......................................................... 16
4.18. EMI Waveforms............................................................................................................. 17
4.19. Surge Test ...................................................................................................................... 18
4.20. ESD Test........................................................................................................................ 18
5.Schematic................................................................................................................................ 19
6.Transformer Specification ...................................................................................................... 20
7.Bill of Materials...................................................................................................................... 23
8.Revision History ..................................................................................................................... 24

© 2011 Fairchild Semiconductor Corporation 3 FEBFSQ500L_H257v1 • Rev. 1.0.1
This user guide supports the evaluation kit for the FSQ500L. It should be used in
conjunction with the FSQ500L datasheet as well as Fairchild’s application notes and
technical support team. Please visit Fairchild’s website at www.fairchildsemi.com.
1. Introduction
This engineering report describes a 2.04W power supply using a FSQ500L. This power
supply is targeted for a flyback converter replaces linear power supplies with low cost
and small size.
1.1. General Description
This device combines a current-mode Pulse Width Modulator (PWM) with a SenseFET
and high-voltage regulator connected from the DRAIN pin to supply the VCC. This device
does not need to use bias winding and associated external components.
Using a SOT-223 package, FSQ500L reduces total size and weight while increasing
efficiency, productivity, and system reliability. Using FSQ500L, this design example for
2.04W can be implemented with few external components and minimized cost.
1.2. Features
Single-Chip 700V SenseFET Power Switch
Precision Fixed Operating Frequency: 130kHz
No-load consumption 250mW at 265VAC with Burst Mode and Down to 60mW
with External Bias
Internal Startup Switch
Soft-Start Time Tuned by External Capacitor
Under-Voltage Lockout (UVLO) with Hysteresis
Pulse-by-Pulse Current Limit
Overload Protection (OLP) and Internal Thermal Shutdown Function (TSD) with
Hysteresis
Auto-Restart Mode
No Need for Auxiliary Bias Winding

© 2011 Fairchild Semiconductor Corporation 4 FEBFSQ500L_H257v1 • Rev. 1.0.1
S
R
Q
OSC
RSENSE
(0.3V)
OLP
TSD
LEB
IFB
I
8R
R250ns
VREF UVLO
HV/REG
1
D
6.5V
HV/REG OFF
4
GND
2
VCC
3
VFB
VBURL/VBURH
VSD
A/R
S
RQ
VCC VCC
Soft-Soft
7.7VZ
IDELAY
(BURST MODE:IFB/2)
Figure 1. Internal Block Diagram
2. Specifications
Table 1. Summary of Features and Performance
Description Min. Max. Unit
Input
Voltage 90 264 VAC
Frequency 47 63 Hz
Output
Output Voltage 1 5.1 V
Output Current 1 0 0.4 A
Total Output Power
Full-load Output Power 0 2.04 W
Peak Output Power W

© 2011 Fairchild Semiconductor Corporation 5 FEBFSQ500L_H257v1 • Rev. 1.0.1
3. Photographs & PCB Layout
Figure 2. Top Overlay Silk Screen
Figure 3. Bottom Layer Pattern
Figure 4. Bottom Overlay Silk Screen

© 2011 Fairchild Semiconductor Corporation 6 FEBFSQ500L_H257v1 • Rev. 1.0.1
4. Function Test Report
Test Model FEBFSQ500L_H257v1
Test Date June.23, 2008
Test Temperature Ambient
Test Equipment
AC source: 6800 AC POWER SOURCE
Electronic load: Chroma 63030
Power meter: WT210
Oscilloscope: LeCory 24Xs
Test Items
1 Input Current
2 Input Wattage at No-Load Condition
3 Burst Mode Test
4 Soft-Start Test
5 Turn-On Delay Test
6 DC Output Rising Time
7 Line and Load Regulation
8 Efficiency
9 Output Ripple and Noise
10 Step Load Response
11 Over-Current Protection
12 Hold-Up Time
13 Short Circuit Protection
14 Maximum Duty Ratio
15 Power Off
16 Over-Temperature Protection (OTP)
17 Voltage Stress of Drain and Secondary Rectifier
18 EMI Waveforms
19 Surge Test
20 ESD Test
4.1. Input Current
4.1.1. Test Condition
Measure the AC input current at maximum loading.
Table 2. Test Result
Input Voltage Input Current
85VAC / 60Hz 57.62mA
264VAC / 50Hz 35.73mA

© 2011 Fairchild Semiconductor Corporation 7 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.2. Input Wattage at No-Load Condition
4.2.1. Test Condition
Measure the input wattage and output voltage at no load.
Table 3. Test Result
Input Voltage Input Wattage Output Voltage Specification
85VAC / 60Hz 0.094W 5.224V
< 0.25W
120VAC / 60Hz 0.116W 5.224V
230VAC / 50Hz 0.209W 5.224V
264VAC / 50Hz 0.242W 5.224V
4.3. Burst Mode Test
4.3.1. Test Condition
Measure the waveform and frequency in Burst Mode at no load.
Figure 5. 85VAC
/
60Hz at No Load
(Ch 1: Vo, Ch 2: VDS, Ch 3: VFB) Figure 6. 264VAC
/
50Hz at No Load
(Ch 1: Vo, Ch 2: VDS, Ch 3: VFB)
Ch1
Ch2
Ch2
Ch3 Ch3
Ch1

© 2011 Fairchild Semiconductor Corporation 8 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.4. Soft-Start Test
4.4.1. Test Condition
Measure the soft-start waveform at maximum load with ambient, after short, after OTP.
Table 4. Test Result
Input Voltage Soft-Start Time
120VAC / 60Hz 14ms Under
240VAC / 50Hz 14ms Under
Figure 7. 120VAC / 60Hz at Max. Load, Ambient
(Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN) Figure 8. 240VAC / 50Hz at Max. Load, Ambient
(Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN)
Figure 9. 120VAC / 60Hz at Max. Load, After Short
(Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN) Figure 10. 240VAC / 50Hz at Max. Load, After Short (Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN)
Figure 11. 120VAC / 60Hz at Max. Load, After OTP
(Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN) Figure 12. 240VAC / 50Hz at Max. Load, After OTP
(Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN)
Ch2
Ch3
Ch1 Ch1
Ch1
Ch1
Ch1 Ch1
Ch3
Ch3
Ch3
Ch3
Ch3
Ch2
Ch2 Ch2
Ch2
Ch2
Ch4 Ch4
Ch4 Ch4
Ch4
Ch4

© 2011 Fairchild Semiconductor Corporation 9 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.5. Turn-On Delay Test
4.5.1. Test Condition
Set the output at maximum loading. Measure the interval between AC plug-in and
stable output.
Table 5. Test Result
Input Voltage Maximum Load
85VAC / 60Hz 89.60ms
264VAC / 50Hz 99.08ms
Figure 13. 85VAC
/
60Hz at Max. Load
(Ch 1: VO, Ch 4: VAC) Figure 14. 264VAC
/
50Hz at Max. Load
(Ch 1: VO, Ch 4: VAC)
4.6. DC Output Rising Time
4.6.1. Test Condition
Set output at maximum loading and no loading. Measure the time interval between 10%
and 90% of output voltage during startup.
Table 6. Test Result
Input Voltage Maximum Load No Load Specification
85VAC / 60Hz 5.26ms 4.04ms < 20ms
264VAC / 50Hz 5.05ms 3.63ms
Ch1
Ch4
Ch4
Ch1

© 2011 Fairchild Semiconductor Corporation 10 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 15. 85VAC
/
60Hz at No Load
(Ch 1: VO, Ch 2: VDS, Ch 3: VFB) Figure 16. 85
V
AC
/
60Hz at Max. Load
(Ch 1: VO, Ch 2: VDS, Ch 3: VFB)
Figure 17. 264
V
AC
/
50Hz at No Load
(Ch 1: VO, Ch 2: VDS, Ch 3: VFB) Figure 18. 264
V
AC
/
50Hz at Max. Load
(Ch 1: VO, Ch 2: VDS, Ch 3: VFB)
4.7. Line and Load Regulation
4.7.1. Test Condition
Measure line and load regulation according to Table 7 (with output cable).
Table 7. Test Result
Input Voltage Output Voltage at
Max. Load Output Voltage at Min. Load Load Regulation
85VAC / 60Hz 5.224V 5.224V 0%
115VAC / 60Hz 5.224V 5.224V 0%
132VAC / 60Hz 5.224V 5.224V 0%
180VAC / 50Hz 5.224V 5.224V 0%
230VAC / 50Hz 5.224V 5.224V 0%
264VAC / 50Hz 5.224V 5.224V 0%
Line Regulation 0% 0%
Ch1 Ch1
Ch3
Ch2
Ch3
Ch2
Ch1Ch3
Ch2
Ch1
Ch3
Ch2

© 2011 Fairchild Semiconductor Corporation 11 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.8. Efficiency
4.8.1. Test Condition
Output at maximum load.
Table 8. Test Result
Input Voltage Input Wattage Output Wattage Efficiency
85VAC / 60Hz 3.17W 2.09W 65.93%
120VAC / 60Hz 3.15W 2.09W 66.34%
230VAC / 50Hz 3.691W 2.09W 56.62%
264VAC / 50Hz 3.933W 2.09W 53.14%
Table 9. Test Result
Efficiency
Input Voltage 25% Load 50% Load 75% Load 100% Load Average
115VAC / 60Hz 55.31% 58.88% 64.43% 66.22% 61.21%
230VAC / 50Hz 43.01% 46.97% 50.96% 56.62% 49.41%
4.9. Output Ripple and Noise
4.9.1. Test Condition
Ripple and noise are measured by using a 20MHz-bandwidth limited oscilloscope with a
10µF capacitor paralleled with a high-frequency 0.1µF capacitor across each output.
Table 10.Test Result
Input Voltage Maximum Load Minimum Load
85VAC / 60Hz 16mV 69mV
120VAC / 60Hz 19mV 69mV
240VAC / 50Hz 16mV 53mV
264VAC / 50Hz 16mV 50mV
Figure 19. 85VAC / 60Hz at No Load (Ch 1: VO) Figure 20. 85VAC / 60Hz at Max. Load (Ch 1: VO)
Ch1 Ch1

© 2011 Fairchild Semiconductor Corporation 12 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 21. 120VAC / 60Hz at No Load (Ch 1: VO) Figure 22. 120VAC / 60Hz at Max. Load (Ch 1: VO)
Figure 23. 240VAC / 50Hz at No Load (Ch 1: VO) Figure 24. 240VAC / 50Hz at Max. Load (Ch 1: VO)
Figure 25. 264VAC / 50Hz at No Load (Ch 1: VO) Figure 26. 264VAC / 50Hz at Max. Load (Ch 1: VO)
4.10. Step Load Response
4.10.1. Test Condition
Dynamic loading (20%~80% of the full load, 5ms duty cycle, 2.5A/µs rise/fall time).
Table 11. Test Result (20%~80% of the Full Load)
Input Voltage Overshoot Undershoot
85VAC / 60Hz 70mV 53mV
264VAC / 50Hz 61mV 119mV
Ch1
Ch1
Ch1 Ch1

© 2011 Fairchild Semiconductor Corporation 13 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 27. 85
V
AC
/
60Hz (Ch 1: VO) Figure 28. 264VAC
/
50Hz (Ch 1: VO)
4.11. Over-Current Protection
4.11.1. Test Condition
Increase output loading gradually and measure the maximum output power.
Table 12. Test Result
Input Voltage Output Current
85VAC / 60Hz 0.611A
120VAC / 60Hz 0.650A
240VAC / 50Hz 0.836A
264VAC / 50Hz 0.881A
4.12. Hold-up Time
4.12.1. Test Condition
Set output at maximum load. Measure the time interval between AC off and output
voltage falling to the lower limit of the rated value. The AC waveform should be off at
zero phase.
Table 13. Test Result
Input Voltage Hold-up Time
85VAC / 60Hz 8.49ms
115VAC / 60Hz 18.64ms
230VAC / 50Hz 77.27ms
264VAC / 50Hz 101.41ms
Ch1 Ch1

© 2011 Fairchild Semiconductor Corporation 14 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 29. 85VAC
/
60Hz at Max. Load
(Ch 1: VO, Ch 4:VAC) Figure 30. 115VAC
/
60Hz at Max. Load
(Ch 1: VO, Ch 4:VAC)
Figure 31. 230VAC
/
50Hz at No Load
(Ch 1: VO, Ch 4:VAC) Figure 32. 264VAC
/
50Hz at Max. Load
(Ch 1: VO, Ch 4:VAC)
4.13. Short Circuit Protection
4.13.1. Test Condition
Short the output of the power supply. The power supply should enter “Auto Restart
Mode” protection with less than 2W input voltage.
Table 14. Test Result
Input Voltage Input Wattage at
Maximum Load Input Wattage at Minimum Load Specification
120VAC / 60Hz 0.574W 0.572W Pin < 2W
240VAC / 50Hz 0.82W 0.824W
Figure 33. 120VAC / 60Hz at Max. Load
(Ch 1: VO, Ch 2: VCC, Ch 3: VFB, Ch 4:VDS) Figure 34. 240VAC / 50Hz at Max. Load (Ch 1: VO, Ch 2: VCC, Ch 3: VFB, Ch 4:VDS)
Ch4 Ch4
Ch4 Ch4
Ch3
Ch2
Ch3
Ch2
Ch1 Ch1
Ch1
Ch1
Ch4 Ch4
Ch1 Ch1

© 2011 Fairchild Semiconductor Corporation 15 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.14. Maximum Duty Ratio
4.14.1. Test Condition
Set the output at maximum loading. Decrease the input voltage with 5VAC step. Verify
the FB voltage is under overload state (between 2.7~4V). Measure the maximum duty
and waveform.
Figure 35. 50VAC / 60Hz at Max. Load (Ch 1: VO, Ch 2: VFB, Ch 3: VCC, Ch 4: IDRAIN)
4.15. Power Off
4.15.1. Test Condition
Set the output at the maximum load. Remove power.
Figure 36. 120VAC / 60Hz at Max. Load
(Ch 1: VO, Ch 2: VCC, Ch 3: VFB, Ch 4:VDS) Figure 37. 240VAC / 50Hz at Max. Load (Ch 1: VO, Ch 2: VCC, Ch 3: VFB, Ch 4:VDS)
4.16. Over-Temperature Protection (OTP)
4.16.1. Test Condition
Set the output at maximum loading. Heat the IC with a heatgun, measure the waveform to
enable the OTP, and disable the OTP.
Ch2
Ch3
Ch4
Ch3
Ch2
Ch3
Ch2
Ch4 Ch4
Ch1 Ch1
Ch1

© 2011 Fairchild Semiconductor Corporation 16 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 38. 120VAC / 60Hz at Max. Load, Enable
(Ch 1: VO, Ch 2: VCC. Ch 3: VFB, Ch 4: VDS) Figure 39. 120VAC / 60Hz at Max. Load, Disable (Ch 1: VO, Ch 2: VCC. Ch 3: VFB, Ch 4: VDS)
Figure 40. 240VAC / 50Hz at Max. Load, Enable
(Ch 1: VO, Ch 2: VFB. Ch 3: VCC, Ch 4:VDS) Figure 41. 240VAC / 50Hz at Max.Load, Disable (Ch 1: VO, Ch 2: VFB. Ch 3: VCC, Ch 4:VDS)
4.17. Voltage Stress of Drain and Secondary Rectifier
4.17.1. Test Condition
Measure the voltage stress of drain and secondary rectifiers under conditions specified in
the table below.
4.17.2. Test Result
Stress On
MOSFET Rating Stress On Output Rectifier Rating
85VAC / 60Hz, Maximum Load 231V
600V
19.4V
60V
85VAC / 60Hz, Maximum Load, Startup 234V 18.8V
85VAC / 60Hz, Maximum Load, Output Short 212V 13.8V
264VAC / 50Hz, Maximum Load 500V 41.3V
264VAC / 50Hz, Maximum Load, Startup 496V 41.3V
264VAC / 50Hz, Maximum Load, Output Short 471V 35.6V
264VAC / 50Hz, Maximum Load, Turns Off 494V 41.3V
Ch3
Ch2
Ch3
Ch2
Ch3
Ch2
Ch3
Ch2
Ch4
Ch4
Ch1
Ch1
Ch4
Ch4
Ch1
Ch1

© 2011 Fairchild Semiconductor Corporation 17 FEBFSQ500L_H257v1 • Rev. 1.0.1
Figure 42. 264VAC / 50Hz at Max. Load, Operating
(Ch 3: Vak
_
rectifie
r
, Ch 4:VDS
_
MOS) Figure 43. 264VAC / 50Hz at Max. Load, Power Off
(Ch 3: Vak
_
rectifie
r
, Ch 4:VDS
_
MOS)
4.18. EMI Waveforms
Figure 44. Conduction-Line at 115VAC Figure 45. Conduction-Neutral at 115VAC
Figure 46. Conduction-Line at 230VAC Figure 47. Conduction-Neutral at 230VAC
1 QP
CLRW
R
2 A
V
CLRW
R
SGL
150 kHz 150 MHz
OVLD
MT 50 ms
RBW 120 kHz
PREAMP OFFAtt 10 dB
PRN
1 MHz 10 MHz 100 MHz
0
10
20
30
40
50
60
70
80
90
100
EN55022A
EN55022Q
Date: 7.AUG.2008 17:54:47
1 QP
CLRW
R
2 A
V
CLRW
R
SGL
150 kHz 150 MHz
OVLD
MT 50 ms
RBW 120 kHz
PREAMP OFFAtt 10 dB
PRN
1 MHz 10 MHz 100 MHz
0
10
20
30
40
50
60
70
80
90
100
EN55022A
EN55022Q
Date: 7.AUG.2008 17:43:44
1 QP
CLRW
R
2 A
V
CLRW
R
SGL
150 kHz 150 MHz
OVLD
MT 50 ms
RBW 120 kHz
PREAMP OFFAtt 10 dB
PRN
1 MHz 10 MHz 100 MHz
0
10
20
30
40
50
60
70
80
90
100
EN55022A
EN55022Q
Date: 7.AUG.2008 17:13:20
1 QP
CLRW
R
2 A
V
CLRW
R
SGL
150 kHz 150 MHz
OVLD
MT 50 ms
RBW 120 kHz
PREAMP OFFAtt 10 dB
PRN
1 MHz 10 MHz 100 MHz
0
10
20
30
40
50
60
70
80
90
100
EN55022A
EN55022Q
Date: 7.AUG.2008 17:25:34
Ch3
Ch4
Ch3
Ch4
Ch4

© 2011 Fairchild Semiconductor Corporation 18 FEBFSQ500L_H257v1 • Rev. 1.0.1
4.19. Surge Test
Mode Polarity Phase Voltage Condition
L-PE
± 0°
4.4KV
Pass
± 90° Pass
± 180° Pass
± 270° Pass
N-PE
± 0°
4.4KV
Pass
± 90° Pass
± 180° Pass
± 270° Pass
4.20. ESD Test
Air Discharge (16.5KV) Contact Discharge (8.8KV)
Pass Pass Pass Pass
Figure 48. ESD Test Setup

© 2011 Fairchild Semiconductor Corporation 19 FEBFSQ500L_H257v1 • Rev. 1.0.1
5. Schematic
Figure 49. Schematic

© 2011 Fairchild Semiconductor Corporation 20 FEBFSQ500L_H257v1 • Rev. 1.0.1
6. Transformer Specification
Customer P/N: TRN-0246
DATE 08/12/2008 Version A Page
1/3
1.Dimension:
Note:
1 .Pin3.4.5.6.7.8.removed
UNIT m/m DRAWN CHECK TITLE TRANS
TEL [phone] Ci wun Chen Guo long Huang IDENT
N O. TRN-0246
FAX [phone] SEN HUEI INDUSTRIAL CO.,LTD. D W G
N O.