FEB212-004 User Guide FSFR2100 Evaluation Board Test Report

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www.fairchildsemi.com
FEB212-004 User Guide
FSFR2100 Evaluation Board Test Report
Application for LCD TV Power Supply
Featured Fairchild Products: FSFR2100
http://www.fairchildsemi.com/evalboard/
© 2007 Fairchild Semiconductor Corporation
FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
Table of Contents
1. Featured Fairchild Products ...................................................................................................... 3
1.1.
FSFR2100 ....................................................................................................................... 3
1.2.
Power Supply Specification Table.................................................................................. 3
1.3.
Board Schematic ............................................................................................................. 4
1.4.
Bill of Materials .............................................................................................................. 5
1.5.
Transformer Specification............................................................................................... 6
1.6.
FSFR2100 (LLC) Printed Circuit Board......................................................................... 7
2. Test Results............................................................................................................................... 8
2.1.
Primary-Side MOSFET Voltage and Current Waveforms ............................................. 8
2.2.
Secondary-Side Rectifier Diodes Voltage and Current Waveforms............................. 10
2.3.
On/Off Waveforms ....................................................................................................... 12
2.4.
Output Voltage Ripple .................................................................................................. 14
2.5.
Hold-Up Time Test ....................................................................................................... 15
2.6.
Protection Operation Waveforms ................................................................................. 16
2.7.
Efficiency...................................................................................................................... 17
© 2007 Fairchild Semiconductor Corporation
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FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
1.
Featured Fairchild Products
1.1. FSFR2100
FSFR2100 is an integrated Pulse-Frequency-Modulation (PFM) controller and
MOSFETs especially designed for Zero-Voltage-Switching (ZVS) resonant half-bridge
converter topologies.
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
Variable frequency control with 50% duty cycle for half-bridge resonant
converter topology
High efficiency through zero voltage switching (ZVS)
Internal SuperFETs with fast recovery type body diode (trr=120ns)
Fixed dead time (350ns)
Up to 300kHz operating frequency
Pulse skipping for frequency limit (programmable) at light-load condition
Simple remote ON/OFF control
Various protection functions: Over-Voltage Protection (OVP), Overload Protection
(OLP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP),
Internal Thermal Shutdown (TSD)
1.2. Power Supply Specifications
20ms hold-up time for VIN=390VDC
Application
FPS Device
Input Voltage Range
Rated Output
Power
Output Voltage
(Rated Current)
LCD TV
FSFR2100
VIN nominal: 390VDC •
(340~400VDC)
VCC supply: 18VDC
192W
24V-8A
Description
Min.
Typ.
Max.
Units
Input Voltage (VIN)
340V
390V
400V
VDC
Output Voltage (VOUT)
24V
Output Current (IOUT)
0
Rated Output Power (PO)
© 2007 Fairchild Semiconductor Corporation
3
VDC
8
ADC
192
W
FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
1.3. Board Schematic
Figure 1.
FSFR2100 Evaluation Board (LCC Resonant Converter)
1
VDL
Figure 2.
© 2007 Fairchild Semiconductor Corporation
2
3 4 5 6 7 8
RT SG LVcc
CON CS PG
9
10
VCTR
HVcc
FSFR2100 Package Diagram (9-SIP)
4
FEB212_004 — FSFR2100 • Rev. 0.0.4
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1.4. Bill of Materials
Item
Number
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
Part Reference
Value
Note
C101
C102
C103
C104
C105
C106
C107
C108
C109
C110, C111
C112
C201, C202
C203
C204
C301
R101
R102
R103
R104
R105
R106
R107
R108
R109, R110
R111
R112
R113
R114, R201
R202
R203
R204
R205
R206
RT101
LF101
D101
D211, D212
Z101
BD101
F101
U1
U2
U3
U4
U5
220µF/450VDC
22nF/630V
100pF
Open
0.33µF/50V
150nF
10µF/50V
12nF
22µF/50V
330nF/275VAC
680pF
2200µF/35V
47nF
12nF
3.3nF
0.2Ω
1kΩ
Short
5.1kΩ
7.5kΩ
27Ω
2.2kΩ
open
1MΩ
45kΩ
10kΩ
400kΩ
10kΩ
1kΩ
33kΩ
62kΩ
7KΩ
2kΩ
5D-9
23mH
1N4937
FYP2010DN
1N4736
RBV606
3.15A/250V
FSFR2100
H11A817B
KA431
2N2222
2N2907
Electrolytic
Film
Ceramic
Samyoung Electronics
Samwha Electronics
Samwha Electronics
Electrolytic
Film
Electrolytic
Film
Electrolytic
Interference Suppression Film
Ceramic
Electrolytic
Film
Film
AC ceramic
1W
RS10.21%R-ND
1/4W
1.00KXTR-ND
Samyoung Electronics
Samwha Electronics
Samyoung Electronics
Samwha Electronics
Samyoung Electronics
Pilkor Electronics
Samwha Electronics
Samyoung Electronics
Samwha Electronics
Samwha Electronics
Samwha Electronics
Stackpole Electronics Inc.
YAGEO
1/4W
1/4W
1/4W
1/4W
5.11KXTR-ND
7.50KXTR-ND
27.4XTR-ND
2.21KXTR-ND
YAGEO
YAGEO
YAGEO
YAGEO
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
1/4W
1.00MXTR-ND
45.3KXTR-ND
10.0KXTR-ND
402KXTR-ND
10.0KXTR-ND
1.00KXTR-ND
33.2KXTR-ND
61.9KXTR-ND
6.98KXTR-ND
2.00KXTR-ND
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
YAGEO
600V/1A
100V/20A
6.8V
Bridge Diode
1N4937-ND
FYP2010DNTU-ND
1N4736A-ND
Fairchild Semiconductor
Fairchild Semiconductor
Fairchild Semiconductor
Fairchild Semiconductor
FPS™
Opto-Coupler
Voltage Reference
NPN Transistor
PNP Transistor
FSFR2100-ND
H11Ab17B-ND
KA431LZTA-ND
PN2222BU-ND
PN2907-ND
Fairchild Semiconductor
Fairchild Semiconductor
Fairchild Semiconductor
Fairchild Semiconductor
Fairchild Semiconductor
© 2007 Fairchild Semiconductor Corporation
Manufacturer
Digi-Key
5
FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
1.5. Transformer Specification
Figure 3.
Transformer Specifications
1.5.1 Winding Specification
Pin (S→ F)
Wire
Turns
Winding Method
Np
8→1
0.12φ×30 (Litz wire)
36
Section winding
Ns1
12 → 9
0.1φ×100 (Litz wire)
4
Section winding
Ns2
16 → 13
0.1φ×100 (Litz wire)
4
Section winding
1.5.2 Core & Bobbin
2
Core: EER3542 (Ae=107mm )
Bobbin: EER3542 (Horizontal)
1.5.3 Electrical Specifications
Pin
Specification
Remark
Primary-Side Inductance (LP)
1-8
630µH ± 5%
100kHz, 1V
Primary-Side Effective Leakage (LR)
1-8
135µH Maximum
Short one of the secondary windings
For more detailed information regarding the transformer, visit http://www.santronics-usa.com/documents.html or
contact [email protected] or +1-408-734-1878 (Sunnyvale, California USA).
© 2007 Fairchild Semiconductor Corporation
6
FEB212_004 — FSFR2100 • Rev. 0.0.4
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1.6. FSFR2100 (LLC) Printed Circuit Board
Figure 4.
Figure 5.
© 2007 Fairchild Semiconductor Corporation
Top PCB Image of the Evaluation Board
Bottom PCB Image of the Evaluation Board
7
FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
2.
Test Results
2.1. Primary-Side MOSFET Voltage and Current Waveforms
Figure 6.
Operation Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div)
C3: Low-Side MOSFET VDS (200V/div), Time: 5µs/div
Figure 7.
Operation Waveforms at Nominal Input Voltage [VIN=390VDC, PO=0W (24V/0A)]
C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div)
C3: Low-Side MOSFET VDS (200V/div), Time: 5µs/div
© 2007 Fairchild Semiconductor Corporation
8
FEB212_004 — FSFR2100 • Rev. 0.0.4
www.fairchildsemi.com
Figure 8.
Operation Waveforms at Minimum Input Voltage [VIN=340VDC, PO=192W (24V/8A)]
C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div)
C3: Low-Side MOSFET VDS (200V/div), Time: 5µs/div
Figure 9.
Operation Waveforms at Minimum Input Voltage [VIN=340VDC, PO=0W (24V/0A)]
C4: Transformer Primary-Side Current (2A/div), C1: Low-Side MOSFET Current (2A/div)
C3: Low-Side MOSFET VDS (200V/div), Time: 5µs/div
© 2007 Fairchild Semiconductor Corporation
9
FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.2. Secondary-Side Rectifier Diodes Voltage and Current
Waveforms
Figure 10. Operation Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C1: Transformer Primary-Side Current (2A/div), C4: Rectifier Diode (D211) Current (10A/div)
C2: Rectifier Diode (D211) Voltage (50V/div), Time: 5µs/div
Figure 11. Operation Waveforms at Minimum Input Voltage [VIN=340VDC, PO=192W (24V/8A)]
C1: Transformer Primary-Side Current (2A/div), C4: Rectifier (D211) Diode Current (10A/div)
C2: Rectifier Diode (D211) Voltage (50V/div), Time: 5µs/div
© 2007 Fairchild Semiconductor Corporation
10
FEB212_004 — FSFR2100 • Rev. 0.0.4
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Figure 12. Operation Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C1: Rectifier Diode (D211) Current (10A/div), C4: Rectifier Diode (D212) Current (10A/div)
C3: Rectifier Diode Voltage (50V/div), Time: 5µs/div
Figure 13. Operation Waveforms at Minimum Input Voltage [VIN=340VDC, PO=192W (24V/8A)]
C1: Rectifier Diode (D211) Current (10A/div), C4: Rectifier Diode (D212) Current (10A/div)
C3: Rectifier Diode Voltage (50V/div), Time: 5µs/div
© 2007 Fairchild Semiconductor Corporation
11
FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.3. On/Off Waveforms
Figures 14 and 15 show the soft-start waveforms at full-load and no-load conditions,
respectively, for nominal input voltage condition. For these waveforms, the input DC bus
is applied first, then VCC for FSFR2100 is supplied.
Figure 14. Startup Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div)
C3: Low-Side MOSFET VDS (500V/div), Time: 10ms/div
Figure 15. Startup Waveforms at Nominal Input Voltage [VIN=390VDC, PO=0W (24V/0A)]
C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div)
C3: Low-Side MOSFET VDS (500V/div), Time: 10ms/div
© 2007 Fairchild Semiconductor Corporation
12
FEB212_004 — FSFR2100 • Rev. 0.0.4
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Figure 16 shows startup waveforms when VCC of 18V is supplied first, then the input
voltage source is applied. When the DC bus voltage reaches ~330V, the external
brownout circuit connects VCC supply voltage to FSFR2100 so it starts up. Figure 17
shows shutdown waveforms when the input voltage source is turned off. When the DC
bus voltage reaches ~260V, the external brownout circuit disconnects VCC from
FSFR2100 so it stops operation.
Figure 16.
Power-on Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C1: Output Voltage (20V/div), C4: Transformer Primary-Side Current (2A/div)
C3: Low-Side MOSFET VDS (500V/div), Time: 5ms/div
Figure 17.
Power-Off Waveforms at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C3: Input Voltage (100V/div), C2: VCC Supply Voltage (10V/div)
C4: Transformer Primary-Side Current (2A/div), Time: 20ms/div
© 2007 Fairchild Semiconductor Corporation
13
FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.4. Output Voltage Ripple
Figure 18 shows the output voltage ripple at nominal input voltage and full-load
condition. The peak-to-peak ripple voltage is 0.5V, about 2% of the output voltage.
Figure 19 shows the output voltage ripple with pulse load at nominal input voltage. The
peak-to-peak ripple voltage is 0.8V, about 3% of the output voltage.
Figure 18. Output Voltage Ripple at Nominal Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C2: Output Voltage (500mV/div), C4: Transformer Primary-Side Current (2A/div), Time: 20ms/div
Figure 19. Output Voltage Ripple with Pulse Load Current at Nominal Input Voltage
[VIN=390VDC, (IO=0A ÅÆ 8A, Slew Rate=50mA/µs, Duty Cycle=50%, Frequency=180Hz)]
C1: Output Current (5AV/div), C4: Transformer Primary-Side Current (2A/div)
C2: Output Voltage Ripple, Time: 20ms/div
© 2007 Fairchild Semiconductor Corporation
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FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.5. Hold-Up Time Test
To see the hold-up time, the input DC bus is disconnected while the converter operates in
full-load condition. Observe that the output voltage is maintained for 34ms when the
input DC bus is disconnected.
Figure 20.
Output Voltage Waveform after Turning Off Input Voltage [VIN=390VDC, PO=192W (24V/8A)]
C3: Input Voltage (100V/div), C1: Output Voltage (10V/div)
C4: Transformer Primary-Side Current (2A/div), Time: 10ms/div
© 2007 Fairchild Semiconductor Corporation
15
FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.6. Protection Operation Waveforms
Figure 21 shows the overload protection (OLP) waveforms. The output current increases
from 8A to 16A. When the transformer primary-side current reaches its trip point of 3A,
the over-current protection is triggered. Figure 22 shows the output short protection
waveforms. When the transformer primary-side current reaches its trip point of 3A, the
over-current protection is triggered.
Figure 21. Protection Waveform at Overload Condition [VIN=390VDC, (IO=8AÆ16A)]
C3: Low-Side Drain Voltage (200V/div), C4: Transformer Primary-Side Current (2A/div), Time: 50µs/div
Figure 22. Protection Waveform at Output Short Condition [VIN=390VDC, (IO=8AÆShort)]
C2: Current Sensing Pin (CS) Voltage (1V/div), C3: Low-Side MOSFET VDS (500V/div)
C4: Transformer Primary-Side Current (2A/div), Time: 20µs/div
© 2007 Fairchild Semiconductor Corporation
16
FEB212_004 — FSFR2100 • Rev. 0.0.4
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2.7. Efficiency
95
94
93
92
91
Eff (%)
90
89
88
87
86
85
84
83
82
81
80
0
25
50
75
Figure 23.
© 2007 Fairchild Semiconductor Corporation
100
Po (W)
125
150
175
200
Measured Efficiency
17
FEB212_004 — FSFR2100 • Rev. 0.0.4
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© 2007 Fairchild Semiconductor Corporation
18
FEB212_004 — FSFR2100 • Rev. 0.0.4

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