www.fairchildsemi.com
Fairchild Reference Design
The following reference design supports inclusion of FEB-L013 in design of LED SMPS. It should be used in demo board with the FL7930B, FAN7621S and discrete datasheet as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at http://www.fairchildsemi.com.
Application |
Fairchild Device |
Input Voltage Range |
Output |
Output Voltage |
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Power |
(Rated Current) |
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FAN7930B |
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LED SMPS |
FAN7621S |
85-277VAC@300VACMAX |
150W |
103V(1.46A) |
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FCPF11N60NT |
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FDPF7N60NZ |
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Key Features
Constant-Voltage (C.V) and Constant-Current (C.C) Control with SecondaryFeedback Circuitry
Low EMI through zero current switching of PFC and zero voltage switching of DCDC converter
Precise Adjustable Ouput over-voltage Protection
Internal Soft start and overshoot-less control
Internal Total Harmonic Distortion(THD) Optimizer
Variable frequency control with 50% duty cycle for half-bridge resonant converter topology
Fixed dead time(350ns)
Up to 300kHz operating frequency
Auto-restart operation for all protections with an external LVCC
Low gate charge
Low Crss
Fast switching
100% avalanche tested
Improved dv/dt capability
ESD Improved capability
Protection Functions: UVLO, Over-Voltage, Over-Current
© 2011 Fairchild Semiconductor Corporation |
1 |
RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0 |
www.fairchildsemi.com
1. Schematics
2 |
1 |
CN1 CON3 |
CP9 CP21 1uF.0 33uF/25V |
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68K/2W |
RP5 |
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FS101 |
F1 |
CP14 1uF |
2K.5 |
RP27 |
24K |
RP12 |
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2 |
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1 |
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ZNR1 |
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1M |
RS3 |
1M |
RS2 |
1M |
RS1 |
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470nF |
CS3 |
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3 |
1 |
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LF1 10mH |
4 |
2 |
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CS4 470nF |
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CS10 7nF.4 |
FG |
CS9 7nF.4 |
3 |
1 |
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LF2 10mH |
4 |
2 |
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220nF |
CS11 |
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4 |
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- |
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3 |
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1 |
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2 + |
BD1 |
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68uF/630V.0 |
CP20 |
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0 |
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VDC |
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0 |
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1k |
RP37 |
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0 |
100p |
CP19 |
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RP38A 2.0 |
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0 |
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10.SG |
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16.PG |
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CP10 1uF |
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RS1M |
DP3 |
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6 |
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3 |
5 |
8 |
FAN7930BU1 |
PFC |
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GND |
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COMP |
ZCD |
VCC |
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8 |
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6 |
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7 |
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9 |
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OVP |
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INV |
CS |
OUT |
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10 |
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2 |
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1 |
4 |
7 |
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LL414827 |
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CP11 470pF |
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U3 MMBT2907A |
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DP4 |
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EER3019N |
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RP16 |
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1/5W.0 |
RP33 |
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10K |
RP30 |
7.4 |
RP18 |
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M1 FCPF11N65 |
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75K |
RP29 |
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3M.4 |
RP20 |
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3M.4 |
RP13 |
3M.4 |
RP3 |
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1nF 75K |
CP15 RP31 |
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3M.4 |
RP21 |
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CP4 120uF/450V |
3M.4 |
RP14 |
3M.4 |
RP4 |
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1nF |
CP16 |
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120uF/450V |
CP5 |
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120uF/450V |
CP8 |
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RP6 0 |
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PC1B PS2561 |
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33uF/25V |
CP6 |
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RS1M |
DP2 |
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3 |
CP18 12n |
4 |
0 |
2k.8 2k |
RP24 RP23 |
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ZDP1 MMSZ5248 |
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RP10 33k |
Q1 MMBT2222A |
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0 |
RP7 |
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0 |
10uF/16V |
CP17 |
7k.2 |
RP25 |
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CP2 33uF/25V |
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6 |
CP22 |
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0 |
CP7 680p |
8uF/50V. |
0 |
10k |
RP11 |
9 |
6 |
8 |
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CS. |
A/R. |
RT. |
0 |
ZDP2 MMSZ5235 |
Q3 MMBT2222A |
RP8 10k |
Q2 MMBT2907A |
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12.LVcc |
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FAN7621S |
HVcc.1 |
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LO14. |
CTR2. |
HO.3 |
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3 |
RP35 |
DP7 LL414810 |
3 |
RP28 |
LL414810 |
DP6 |
U2 FAN7621S |
10 |
RP17 |
47k |
RP15 |
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RP9 1M |
RP2 1M |
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RP34 |
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RP22 |
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0 |
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U5 MMBT2907A |
RP36 10k |
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RP32 10k U4 MMBT2907A |
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RS1M |
DP5 |
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FDPF7N60NZ |
M3 |
FDPF7N60NZ |
M2 |
C1 100nF |
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8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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0 |
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EER3543 |
TM2 |
VDC
4 |
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5 |
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3 |
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1 |
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2 |
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TM1 |
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FFPF08H60S |
DP1 |
RP1 390k
CP1 22nF/630V
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3n.3 |
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C2 |
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RS1M |
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9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
47uF47uF47uF 47uF |
CS5CS6CS7 CS8 |
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33uF/25V |
CP13 |
33k |
RP26 |
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DS1 |
10 |
RP19 |
FFPF20UA60DN |
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D1 |
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FFPF20UA60DN |
D2 |
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0 |
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MMSZ5248 |
ZDP3 |
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MMBT2222A |
Q4 |
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47uF 47uF |
CS2 CS1 |
CON2 |
J2 |
2 |
1 |
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2 1 |
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PC1A PS2561 |
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VLED ISENSE VAUX VFB FB |
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1 2 3 4 5 6 7 8 9 10 11 12 |
CON12 |
J1 |
CS19 |
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RS33 |
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220nF |
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47k |
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J6 |
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4 |
V- |
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VLED |
1 |
LM358/ON |
- |
2 |
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ISENSE |
2 |
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VAUX |
3 |
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1 |
OUT |
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VFB |
4 |
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RS35 |
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5 |
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+ |
3 |
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13k |
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6 |
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8 |
V+ |
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7 |
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U6A |
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8 |
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9 |
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10 |
DS2 |
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RS42 |
0.1 |
11 |
LL4148 |
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CS6 |
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12 |
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33uF/25V |
RS40 |
RS41 |
RS49 |
RS44 |
N.C |
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100k |
4.7k |
1k |
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CON12 |
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R46 |
N.C |
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U7 |
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TL431 |
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RS55 |
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DS3 |
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120k |
RS57 |
LL4148 |
CS25 |
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RS56 |
330k |
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220nF |
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47k |
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4 |
V- |
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LM358/ON |
- |
6 |
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7
OUT
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+ |
5 |
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8 |
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V+ |
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U6B |
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RS59 |
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VAUX |
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8.2k |
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Figure 1. |
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Schematic |
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© 2011 Fairchild Semiconductor Corporation |
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2 |
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|
RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0 |
www.fairchildsemi.com
2.Transformer
2.1Connections PFC Transformer and Winding Specifications
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EER3019N |
10 |
1,2 |
NauxA |
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0.3φ / 5T |
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9 |
NP |
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0.1φ * 50 |
7 |
39T |
NauxB |
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0.3φ / 5T |
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6 |
3,4 |
NauxB 6 |
7 |
NauxA 10 
9
1,2
Np
3,4
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Figure 2. Transformer specifications & construction. |
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Table 1. Winding specifications. |
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No |
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Winding |
Pin(S → F) |
Wire |
Turns |
Winding Method |
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1 |
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Np |
3,4 → 1,2 |
0.1φ×50 |
39 Ts |
Solenoid winding |
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2 |
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Insulation : Polyester Tape t = 0.025mm, 3Layers |
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3 |
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NauxA |
10 → 9 |
0.3φ |
5 Ts |
Solenoid winding |
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4 |
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Insulation : Polyester Tape t = 0.025mm, 3Layers |
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5 |
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NauxB |
6→ 7 |
0.3φ |
5Ts |
Solenoid winding |
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6 |
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Insulation : Polyester Tape t = 0.025mm, 3Layers |
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Table 2. |
Electrical Characteristics. |
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Pin |
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Spec. |
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Remark |
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Inductance |
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3,4 → 1,2 |
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194uH ±5% |
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100KHz, 1V |
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© 2011 Fairchild Semiconductor Corporation |
3 |
RD-L013_FL7930B_FAN7621S_UniFET2 • Rev. 1.0.0 |
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