Fairchild FEBL010 service manual
User Guide for
FEBL010
Evaluation Board
Universal LED Driver using the FL6961
CRM PFC Controller
Featured Fairchild Product:
FL6961
Direct questions or comments
about this evaluation board to:
“Worldwide Direct Support”
Fairchild Semiconductor.com
© 2012 Fairchild Semiconductor Corporation 1 FEB-L010_FL6961 • Rev. 1.0.0
Table of Contents
1. Introduction ............................................................................................................................... 3
1.1. General Description of FL6961 ....................................................................................... 3
1.2. Features of FL6961 .......................................................................................................... 3
1.3. Block Diagram ................................................................................................................. 4
2. General Specifications for Evaluation Board ........................................................................... 5
2.1 Photographs of the Evaluation Board .............................................................................. 6
2.2 Printed Circuit Board ....................................................................................................... 7
2.3 Schematic of the Evaluation Board .................................................................................. 8
2.4 Bill of Materials ............................................................................................................... 9
2.5 Connections Transformer and Winding Specifications ................................................. 11
3 Performance of Evaluation Board ........................................................................................... 12
3.1 Test Condition & Items .................................................................................................. 12
3.2 Electrical Efficiency ....................................................................................................... 13
3.3 Power Factor .................................................................................................................. 14
3.4 Constant Current & Constant Voltage (CC/CV) ........................................................... 15
3.5 THD Performance .......................................................................................................... 17
3.6 Temperature Checking Results ...................................................................................... 19
3.7 Startup Time................................................................................................................... 20
3.8 Operation Waveforms .................................................................................................... 22
3.9 Short-Circuit Protection ................................................................................................. 24
3.10 Stress of the MOSFET & Rectifier ................................................................................ 25
3.11 Stress of the MOSFET & Rectifier ................................................................................ 29
4. Revision History ..................................................................................................................... 30
© 2012 Fairchild Semiconductor Corporation 2 FEB-L010_FL6961 • Rev. 1.0.0
This user guide supports the evaluation kit for the FL6961. It should be used in
conjunction with the FL6961 datasheet as well as Fairchild’s application notes and
technical support team. Please visit Fairchild’s website at www.fairchildsemi.com.
1. Introduction
This document describes the proposed solution for a universal LED ballast using the
FL6961 CRM PFC controller. The input voltage range is 90V
one DC output with a constant current of 1.25A at 24V
general description of FL6961, the power supply specification, schematic, bill of
materials, and the typical operating characteristics.
1.1. General Description of FL6961
The FL6961 is an active Power Factor Correction (PFC) controller for boost PFC
applications that operate in Critical conduction Mode (CRM). It uses a voltage mode
PWM that compares an internal ramp signal with the error amplifier output to generate
the MOSFET turn-off signal. Because the voltage-mode CRM PFC controller does not
need rectified AC line voltage information, it saves the power loss of the input voltagesensing network required by the current-mode CRM PFC controller.
1.2. Features of FL6961
– 265V
RMS
. This document contains
MAX
and there is
RMS
Boundary Mode PFC Controller
Low Input Current THD
Controlled On-Time PWM
Zero-Current Detection (ZDC)
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking Instead of RC Filtering
Low Startup Current: 10µA (Typical)
Low Operating Current: 4.5mA (Typical)
Feedback Open-Loop Protection
Programmable Maximum On-Time (MOT)
Output Over-Voltage Clamping Protection
Clamped Gate Output Voltage: 16.5V
© 2012 Fairchild Semiconductor Corporation 3 FEB-L010_FL6961 • Rev. 1.0.0
1.3. Block Diagram
Figure 1. Internal Block Diagram of FL6961
© 2012 Fairchild Semiconductor Corporation 4 FEB-L010_FL6961 • Rev. 1.0.0
2. General Specifications for Evaluation Board
All data of the evaluation board was measured with the board enclosed in a case and
external temperature of around 25°C.
Table 1. Summary of Features and Performance
Main Controller FL6961
Input Voltage Range 90VAC~265VAC
Input Voltage Frequency 47Hz~63Hz
Rated Output Power 30W
Rated Output Voltage 24V
Rated Output Current 1.25A
Application LED Lighting
© 2012 Fairchild Semiconductor Corporation 5 FEB-L010_FL6961 • Rev. 1.0.0
2.1 Photographs of the Evaluation Board
Figure 2. Photograph (125mm (W) x 41mm (H)) Top View
Figure 3. Photograph (125mm (W) x 41mm (H)) Bottom View
© 2012 Fairchild Semiconductor Corporation 6 FEB-L010_FL6961 • Rev. 1.0.0
2.2 Printed Circuit Board
Figure 4. Printed PCB, Top Side
Figure 5. Printed PCB, Bottom Side
© 2012 Fairchild Semiconductor Corporation 7 FEB-L010_FL6961 • Rev. 1.0.0
2.3 Schematic of the Evaluation Board
Figure 6. Schematic of Evaluation
© 2012 Fairchild Semiconductor Corporation 8 FEB-L010_FL6961 • Rev. 1.0.0
2.4 Bill of Materials
Table 2. Bill of Materials of Evaluation Board
Item
No.
1 U101 FL6961 1
2 D102, D103 ,D203 RS1M 3
3 Q102 FQPF8N80C 1
4 D101 KBL04 1 Bridge Diode (Fairchild Product)
5
6 Q101, Q201 MMBT2222A 2
7 U102 FOD817 1 Opto-Coupler (Fairchild Product)
8 U203 KA431S 1 Shunt Regulator (Fairchild Product)
9 U201 LM2904 1 Dual OP Amp (Fairchild Product)
10 D201 FFPF12UP20DN 1
11 ZD101, ZD102 FLZ16V 2 Zener Diode (Fairchild Product)
12 C106 102/1kV 1 Ceramic-Capacitor
13 C101 154/275V 1 X – Capacitor
14 C102 224/275V 1 X – Capacitor
15 C112 222/250V 1 Y – Capacitor
16 C114, C115 471/250V 2 Y – Capacitor
17 C201, C202 1000µF / 35V 2 Electrolytic Capacitor
18 C108 10µF/50V 1 Electrolytic Capacitor
19 C109 22µF/50V 1 Electrolytic Capacitor
20 C203 33µF/50V 1 Electrolytic Capacitor
21 C103 154/630V 1 Film Capacitor
22
23 C107 100/2012 1 SMD Capacitor 2012
24 C110 N/C 1 SMD Capacitor 2012
25 C111 104/2012 1 SMD Capacitor 2012
26 C204, C205 474/2012 2 SMD Capacitor 2012
27 F101 250V/1A 1 Fuse
28 L101 200µH 1 Inductor
Part Reference Value Qty Description (Manufacturer)
D104, D204, D205,
D206
C104, C105, C113,
C207
CRM PFC Controller
(Fairchild Product)
1000V/1A Ultra-Fast Recovery Diode
(Fairchild Product)
800V/8A MOSFET
(Fairchild Product)
LL4148 4
105/2012 4 SMD Capacitor 2012
General-Purpose Diode
(Fairchild Product)
General-Purpose Transistor
(Fairchild Product)
Ultrafast Recovery Power Rectifier
(Fairchild Product)
Continued on the following page…
© 2012 Fairchild Semiconductor Corporation 9 FEB-L010_FL6961 • Rev. 1.0.0
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