Datasheet FAN7602CMX Specification

Page 1
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Page 2
FAN7602C Green Current Mode PWM Controller
FAN7602C — Green Current Mode PWM Controller
November 2013
Features
Green Current Mode PWM Controller Random Frequency Fluctuation for Low EMI Internal High-Voltage Startup Switch Burst Mode Operation Line Voltage Feedforward to Limit Maximum Power Line Under-Voltage Protection Latch Protection & Internal Soft-Start (10ms) Function Overload Protection (OLP) Over-Voltage Protection (OVP) Over-Temperature Protection (OTP) Low Operation Current: 1 mA Typical Available in the 8-Lead SOP Package
Applications
Adapter LCD Monitor Power Auxiliary Power Supply
Related Resources
AN-6014- Green Current Mode PWM Controller (Except for frequency fluctuation part in AN-6014)
Description
The FAN7602C is a green current-mode PWM controller. It is specially designed for off-line adapter applications; DVDP, VCR, LCD monitor applications; and auxiliary power supplies.
The internal high-voltage startup switch and the burst mode operation reduce the power loss in standby mode. As a result, the input power is lower than 1 W when the input line voltage is 265 V no-load condition, input power is under 0.15 W.
The maximum power can be limited constantly, regardless of the line voltage change, using the power limit function.
The switching frequency is not fixed and has random frequency fluctuation.
The FAN7602C includes various protections for the system reliability and the internal soft-start prevents the output voltage over-shoot at startup.
and the load is 0.5 W. At
AC
Ordering Information
Part Number
FAN7602CMX -40°C to +150°C 8-Lead Small Outline Package (SOP) Tape and Reel FAN7602C
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1
Operating Junction
Temperature
Package Packing Method Top Mark
Page 3
FAN7602C — Green Current Mode PWM Controller
FAN7602C
LUVP
CS/FB
GND
V
STR
V
CC
Out
Latch/
Plimit
NC
Soft­Start
Delay
Circuit
GND
Plimit
Offset
5V Ref
V
CC
LUVP
OUT
CS/FB
UVLO
6
19V
OVP
12V/8V
5
3
0.95V/0.88V
8
1
4
V
STR
2V/1.5V
4V
Latch/
Plimit
2
Plimit
Offset
Generator
Driver
Circuit
Latch
OLP
OLP
10ms
Soft-Start
SS End
PWM Block
Power Limit
Soft-Start
PWM+
Plimit
Offset
Plimit
Offset
SS End
LUVP
Reset
Circuit
OSC
Latch
OVP
OLP
V
CC
TSD
Auto Restart
Protection
Latch
Protection
Random
Typical Application Diagram
Figure 1. Typical Flyback Application
Internal Block Diagram
Figure 2. Functional Block Diagram
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 2
Page 4
FAN7602C — Green Current Mode PWM Controller
FAN7602C
1 2
6
58 7
3 4
Latch/
Plimit
GNDCS/FBLUVP
V
STR
NC V
CC
Out
YWW
Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin # Name Description
1 LUVP
2 Latch/Plimit
3 CS/FB
4 GND
5 OUT
6 VCC 7 NC 8 V
STR
Line Under-Voltage Protection Pin. This pin is used to protect the set when the input voltage is lower than the rated input voltage range.
Latch Protection and Power Limit Pin. When the pin voltage exceeds 4 V, the latch protection works. The latch protection is reset when the V
voltage is lower than 5 V. For
CC
the power limit function, the OCP level decreases as the pin voltage increases. Current Sense and Feedback Pin. This pin is used to sense the MOSFET current for
the current mode PWM and OCP. The output voltage feedback information and the current sense information are added using an external RC filter.
Ground Pin. This pin is used for the ground potential of all the pins. For proper operation, the signal ground and the power ground should be separated.
Gate Drive Output Pin. This pin is an output pin to drive an external MOSFET. The peak sourcing current is 450 mA and the peak sinking current is 600 mA. For proper operation, the stray inductance in the gate driving path must be minimized.
Supply Voltage Pin. IC operating current and MOSFET driving current are supplied using this pin.
No Connection. Startup Pin. This pin is used to supply IC operating current during IC startup. After
startup, the internal JFET is turned off to reduce power loss.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 3
Page 5
FAN7602C — Green Current Mode PWM Controller
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol Parameter Min. Max. Unit
VCC Supply Voltage 25 V
IO Output Current -600 +450 mA
V
CS/FB Input Voltage -0.3 20.0 V
CS/FB
V
LUVP Input Voltage -0.3 10.0 V
LUVP
V
Latch/Plimit Input Voltage -0.3 10.0 V
Latch
V
V
STR
TJ
T
Storage Temperature Range -55 +150 °C
STG
Input Voltage 600 V
STR
Junction Temperature +150 Recommended Operating Junction Temperature -40 +150
PD Power Dissipation 1.2 W
ESD Electrostatic Discharge Capability
Human Body Model, JESD22-A114 3500 Charged Device Model, JESD22-C101 2000
°C
V
Thermal Impedance
Symbol Parameter Value Unit
θ
Thermal Resistance
JA
Note:
1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10.
(1)
, Junction-to-Ambient 150
°C/W
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 4
Page 6
FAN7602C — Green Current Mode PWM Controller
Electrical Characteristics
VCC = 14V, TA = -25°C~125°C, unless otherwise specified.
Symbol Parameter Condition Min. Typ. Max. Unit
Startup Section
I
STR
V
Startup Current V
STR
= 30 V, TA = 25°C 0.7 1.0 1.4 mA
STR
Under Voltage Lock Out Section
V
Start Threshold Voltage VCC Increasing 11 12 13 V
th_start
Vth_
Stop Threshold Voltage VCC Decreasing 7 8 9 V
stop
HY
UVLO Hysteresis 3.6 4.0 4.4 V
_UVLO
Supply Current Section
IST Startup Supply Current TA = 25°C 250 320 µA
ICC Operating Supply Current Output Not Switching 1.0 1.5 mA
Soft-Start Section
tSS Soft-Start Time
(2)
5 10 15 ms
PWM Section
f
Operating Frequency V
OSC
f
V
CS/FB1
OSC
Frequency Fluctuation
CS/FB Threshold Voltage TA = 25°C 0.9 1.0 1.1 V
tD Propagation Delay to Output
D
MAX
Maximum Duty Cycle 70 75 80 %
(2)
±3 kHz
(2)
100 150 ns
= 0.2 V, TA = 25°C 59 65 73 kHz
CS/FB
D
MIN
Minimum Duty Cycle 0 %
Burst Mode Section
V
Burst On Threshold Voltage TA = 25°C 0.84 0.95 1.06 V
CS/FB2
V
Burst Off Threshold Voltage TA = 25°C 0.77 0.88 0.99 V
CS/FB3
Power Limit Section
K
Offset Gain V
Plimit
Latch/Plimit
= 2 V, TA = 25°C 0.12 0.16 0.20
Output Section
VOH Output Voltage High TA = 25°C, I VOL Output Voltage Low TA = 25°C, I
tR Rising Time tF Falling Time
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 5
(2)
TA = 25°C, CL = 1 nF 45 150 ns
(2)
TA = 25°C, CL= 1 nF 35 150 ns
= 100 mA 11.5 12.0 14.0 V
source
= 100 mA 1.0 2.5 V
sink
Continued on the following page…
Page 7
FAN7602C — Green Current Mode PWM Controller
Electrical Characteristics (Continued)
VCC = 14V, TA = -25°C~125°C, unless otherwise specified.
Symbol Parameter Condition Min. Typ. Max. Unit
Protection Section
V
LATCH
t
OLP
t
OLP_ST
V
OLP
V
LUVPoff
V
LUVPon
V
OVP
TSD
HYS
Latch Voltage 3.6 4.0 4.4 V Overload Protection Time
Overload Protection Time at Startup
(2)
20 22 24 ms
30 37 44 ms
Overload Protection Level 0 0.1 V
Line Under-Voltage Protection On to Off
Line Under-Voltage Protection Off to On
TA = 25°C 1.9 2.0 2.1 V
TA = 25°C 1.4 1.5 1.6 V
Over-Voltage Protection TA = 25°C 18 19 20 V
Shutdown Temperature
(2)
170 °C 60 °C
Note:
2. These parameters, although guaranteed, are not 100% tested in production.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 6
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FAN7602C — Green Current Mode PWM Controller
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Temperature [°C]
Figure 4. Start Threshold Voltage vs. Temperature
Figure 5. Stop Threshold Voltage vs. Temperature
Normalized
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -2 5 0 25 50 75 100 125
Temperature [°C]
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.90
1.00
1.10
1.20
1.30
1.40
1.50
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
Normalized
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Temperature [°C]
Typical Performance Characteristics
Figure 6. UVLO Hysteresis vs. Temperature Figure 7. Startup Threshold Current vs. Temperature
Figure 8. Operating Supply Current vs. Temperature Figure 9. V
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 7
Startup Current vs. Temperature
STR
Page 9
FAN7602C — Green Current Mode PWM Controller
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -2 5 0 25 50 75
100 125
CS FB2 CS FB3
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Typical Performance Characteristics (Continued).
Figure 10. Burst On/Off Voltage vs. Temperature Figure 11. Operating Frequency vs. Temperature
Figure 12. Offset Gain vs. Temperature Figure 13. Maximum Duty Cycle vs. Temperature
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 8
Figure 14. OVP Voltage vs. Temperature Figure 15. Latch Voltage vs. Temperature
Page 10
FAN7602C — Green Current Mode PWM Controller
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Normalized
Temperature [°C]
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-50 -25 0 25 50 75 100 125
Typical Performance Characteristics (Continued)
Figure 16. LUVP On-to-Off Voltage vs. Temperature Figure 17. LUVP Off-to-On Voltage vs. Temperature
Figure 18. CS/FB Threshold Voltage vs. Temperature
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 9
Page 11
FAN7602C — Green Current Mode PWM Controller
t
Soft-Start
Time (10ms)
12V
8V
V
CC
Startup
Current
Soft-Start
Voltage
1V
1.5V
0.5V
5ms
t
SW
t
I
DS
t
t
f
SW
f
SW
+
1/2f
SW
MAX
f
SW
-
1/2f
SW
MAX
no repetition
several
µseconds
several
miliseconds
t
SW
=1/f
SW
Soft-Start
CS/FB
3
PWM
Comparator
V
CC
C
F
R
F
R
S
R
FB
I
FB
I
sw
Plimit Offset
Power
Limit
PWM+
Application Information
1. Startup Circuit and Soft-Start Block
The FAN7602C contains a startup switch to reduce the power loss of the external startup circuit of the conventional PWM converters. The internal startup circuit charges the V source if the AC line is connected. The startup switch is turned off 15 ms after IC starts up, as shown in Figure
19. The soft-start function starts when the V reaches the start threshold voltage of 12 V and ends when the internal soft-start voltage reaches 1 V. The internal startup circuit starts charging the V again if the V
CC
operating voltage, 8 V. The UVLO block shuts down the output drive circuit and some blocks to reduce the IC operating current and the internal soft-start voltage drops to zero. If the V threshold voltage, the IC starts switching again and the soft-start block works as well.
During the soft-start, pulse-width modulated (PWM) comparator compares the CS/FB pin voltage with the soft-start voltage. The soft-start voltage starts from 0.5 V and the soft-start ends when it reaches 1 V and the soft­start time is 10 ms. The startup switch is turned off when the soft-start voltage reaches 1.3 V.
capacitor with 0.9 mA current
CC
voltage
CC
capacitor
CC
voltage is lowered to the minimum
voltage reaches the start
CC
Figure 20. Frequency Fluctuation Waveform
3. Current Sense and Feedback Block
The FAN7602C performs the current sensing for the current mode PWM and the output voltage feedback with only one pin, pin 3. To achieve the two functions with one pin, an internal Leading-Edge Blanking (LEB) circuit to filter the current sense noise is not included because the external RC filter is necessary to add the output voltage feedback information and the current sense information.
Figure 21 shows the current sense and feedback circuits. R
is the current sense resistor to sense the switch
S
current. The current sense information is filtered by an RC filter composed of R output voltage feedback information, I stops charging C zero, C
is discharged through RF and RS to lower the
F
to adjust the offset voltage. If IFB is
F
offset voltage.
and CF. According to the
F
charges or
FB
Figure 19. Startup Current and VCC Voltage
2. Oscillator Block
The oscillator frequency is set internally and FAN7602C has a random frequency fluctuation function.
Fluctuation of the switching frequency of a switched power supply can reduce EMI by spreading the energy over a wider frequency range than the bandwidth measured by the EMI test equipment. The amount of EMI reduction is directly related to the range of the frequency variation. The range of frequency variation is fixed internally; however, its selection is randomly chosen by the combination of external feedback voltage and internal free-running oscillator. This randomly chosen switching frequency effectively spreads the EMI noise nearby switching frequency and allows the use of a cost-effective inductor instead of an AC input line filter to satisfy the world-wide EMI requirements.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 10
Figure 21. Current Sense and Feedback Circuits
Figure 22 shows typical voltage waveforms of the CS/FB pin. The current sense waveform is added to the offset voltage, as shown in the Figure 22. The CS/FB pin voltage is compared with PWM that is 1 V - Plimit offs et. If the CS/FB voltage meets PWM+, the output drive is shut off. If the feedback offset voltage is LOW, the switch on-time is increased. If the feedback offset voltage is HIGH, the switch on-time is decreased. In this way, the duty cycle is controlled according to the output load condition. Generally, the maximum output power increases as input voltage increases because the current slope during switch on-time increases.
Page 12
FAN7602C — Green Current Mode PWM Controller
PWM+
CS/FB
GND
On Time
FB
Offset
1V
Power Limit
Offset
(a) Low Power Limit Offset Case
PWM+
CS/FB
GND
On Time
FB
Offset
1V
Power Limit
Offset
(b) High Power Limit Offset Case
CS/FB
Delay
Circuit
3
+
0.95V/0.88V
Burst+
Offset
OLP
50mV
22ms Timer
Soft-Start
Clock
CS/FB
3
2V/1.5V
1
+
LUVP
V
IN
To limit the output power of the converter constantly, the power limit function is included in FAN7602C. Sensing the converter input voltage through the Latch/Plimit pin, the Plimit offset voltage is subtracted from 1 V. As shown in Figure 22, the Plimit offset voltage is subtracted from 1 V and the switch on-time decreases as the Plimit offset voltage increases. If the converter input voltage increases, the switch on-time decreases, keeping the output power constant. The offset voltage is proportional to the Latch/Plimit pin voltage and the gain is 0.16. If the Latch/Plimit voltage is 1 V, the offset voltage is 0.16 V.
5.1 Overload Protection (OLP)
The FAN7602C contains the overload protection function. If the output load is higher than the rated output current, the output voltage drops and the feedback error amplifier is saturated. The offset of the CS/FB voltage representing the feedback information is almost zero. As shown in Figure 24, the CS/FB voltage is compared with 50 mV reference when the internal clock signal is HIGH and, if the voltage is lower than 50 mV, the OLP timer starts counting. If the OLP condition persists for 22 ms, the timer generates the OLP signal. The protection is reset by the UVLO. The OLP block is enabled after the soft-start finishes.
Figure 24. Overload Protection Circuit
5.2 Line Under-Voltage Protection
If the input voltage of the converter is lower than the minimum operating voltage, the converter input current increases too much, causing components failure. Therefore, if the input voltage is LOW, the converter should be protected. The LUVP circuit senses the input voltage using the LUVP pin and, if this voltage is lower than 2 V, the LUVP signal is generated. The comparator has 0.5 V hysteresis. If the LUVP signal is generated, the output drive block is shut down, the output voltage feedback loop is saturated, and the OLP works if the
Figure 22. CS/FB Pin Voltage Waveforms
LUVP condition persists more than 22 ms.
4. Burst-Mode Block
The FAN7602C contains the burst-mode block to reduce the power loss at a light-load and no load. A hysteresis comparator senses the offset voltage of the Burst+ for the burst mode, as shown in Figure 23. The Burst+ is the sum of the CS/FB voltage and Plimit offset voltage. The FAN7602C enters the burst mode when the offset voltage of the Burst+ is higher than 0.95 V and exits the burst mode when the offset voltage is lower than 0.88 V. The offset voltage is sensed during the switch off time.
5.3 Latch Protection
The latch protection is provided to protect the system against abnormal conditions using the Latch/Plimit pin. The Latch/Plimit pin can be used for the output over­voltage protection and/or other protections. If the Latch/ Plimit pin voltage is made higher than 4 V by an external circuit, the IC is shut down. The latch protection is reset when the V
5.4 Over-Voltage Protection (OVP)
Figure 23. Burst-Mode Block
If the V the OVP protection is reset when the V lower than 5 V.
5. Protection Block
The FAN7602C contains several protection functions to improve system reliability.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 11
Figure 25. Line UVP Circuit
voltage is lower than 5 V.
CC
voltage reaches 19 V, the IC shuts down and
CC
voltage is
CC
Page 13
FAN7602C — Green Current Mode PWM Controller
6. Output Drive Block
The FAN7602C contains a single totem-pole output
sinking current with typical rise and fall time of 45 ns and 35 ns, respectively, with a 1 nF load.
stage to drive a power MOSFET. The drive output is capable of up to 450 mA sourcing current and 600 mA
Typical Application Circuit
Application Output Power Input Voltage Output Voltage
Adaptor 48 W Universal Input (85 ~ 265 VAC) 12V
Features
Low stand-by power (<0.15 W at 265 V Constant output power control
AC
)
Key Design Notes
All the IC-related components should be placed close to IC, especially C107 and C110. If R106 value is too low, there can be subharmonic oscillation. R109 should be designed carefully to make the V
no load.
R110 should be designed carefully to make the V
at full load.
R103 should be designed to keep the MOSFET V
shorted.
voltage higher than 8 V when the input voltage is 265 VAC at
CC
voltage lower than OVP level when the input voltage is 85 VAC
CC
voltage lower than maximum rating when the output is
DS
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 12
Page 14
FAN7602C — Green Current Mode PWM Controller
FUSE
AC INPUT
C101
LF1
C102
RT101
BD101
C105
C202
D204 L201
R204
R103
R101
5
6
7
8
NC
Vstr
V
CC
Out
LUVP
CS/FB
Latch/
Plimit
GND
FAN7602C
1
2
3
4
R205
C203R203
R202
R201
C201
D102
IC201
OP1
R111
R104
D103
R106
Q101
T1
C106
D101
R105
IC101
C110
R113
C107
C204R206
D202
C109
C103 C104
C222
1 23
4
C108
5
6
1312
9
R207
ZD201
R108
OP2
1 23
4
R109
R112
R102
R107
1
2
3
R110
ZD101
R114
Np2
5
6
1
2
12
9
3
N
Vcc
Ns
Np1
Shied
5
Shied
5
3mm 3mm
Ns
Np1
Np2 N
Vcc
NsShield
NsShield
1. Schematic
2. Inductor Schematic Diagram
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 13
Figure 27. Inductor Schematic Diagram
Figure 26. Schematic
Page 15
FAN7602C — Green Current Mode PWM Controller
3. Winding Specification
No. Pin ( S F) Wire Turns Winding Method
Np1 3 → 2 0.3φ x 2 31 Solenoid Winding
Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Shield 5 Copper Tape 0.9 Not Shorted
Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Outer Insulation: Polyester Tape t = 0.03 mm, 2-Layer
Ns 12 → 9 0.65φ x 3 10 Solenoid Winding
Shield 5 Copper Tape 0.9 Not Shorted
N
6 → 5 0.2φ x 1 10 Solenoid Winding
Vcc
Np2 2 → 1 0.3φ x 2 31 Solenoid Winding
4. Electrical Characteristics
Pin Specification Remarks
Inductance 1 - 3 607 µH 100 kHz, 1 V Inductance 1 - 3 15 µH 9 - 12 Shorted
5. Core & Bobbin
Core: EER2828Bobbin: EER2828Ae(mm
2
): 82.1
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 14
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FAN7602C — Green Current Mode PWM Controller
Semiconductor
Fairchild
Semiconductor
Semiconductor
Semiconductor
Fairchild
Semiconductor
Fairchild
Semiconductor
6. Demo Circuit Part List
Part Value Note Part Value Note
Fuse Capacitor
FUSE 1 A/250 V C101 220 nF / 275 V Box Capacitor
NTC C102 150 nF / 275 V Box Capacitor
RT101 5D-9 C103, C104 102 / 1 kV Ceramic
R102, R112 10 1/4 W C106 103 / 630 V Film
R103 56 1/2 W C107 271 Ceramic R104 150 Ω 1/4 W C108 103 Ceramic R105 1 1/4 W C109 22 µF / 25 V Electrolytic
R106 0.5 Ω 1/2 W C110 473 Ceramic R107 56 1/4 W C201, C202 1000 µF / 25 V Electrolytic
R108 10 1/4 W C203 102 Ceramic R109 0 Ω 1/4 W C204 102 Ceramic R110 1 1/4 W C222 222 / 1 kV Ceramic R111 6 1/4 W MOSFET
R113 180 1/4 W Q101 FQPF8N60C
Resistor C105 150 µF / 400 V Electrolytic
Fairchild
R114 50 1/4 W Diode R201 1.5 1/4 W D101, D102 UF4007
R202 1.2 1/4 W D103 1N5819 R203 20 1/4 W D202, D204 FYPF2010DN R204 27 1/4 W ZD101, ZD201 1N4744 R205 7 1/4 W BD101 KBP06
R206 10 Ω 1/2 W TNR R207 10 1/4 W R101 471 470 V
IC Filter
IC101 FAN7602C
IC201 KA431
OP1, OP2 H11A817B
Fairchild
Semiconductor
Fairchild
Semiconductor
Fairchild
Semiconductor
LF101 23 mH 0.8 A
L201 10 µH 4.2 A
Fairchild Fairchild
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 15
Page 17
FAN7602C — Green Current Mode PWM Controller
Minimize Loop Area
Separate Power
and Signal Ground
Minimize Leakage
Inductance
FAN7602C
1 2
6 58 7
YWW
3 4
Latch/P
limit
GNDCS/FBLUVP
V
STR
NC V
CC
OUT
Place these caps.
close to the IC
DC
Link
Pulsating High Current
Signal Level Low Current
7. PCB Layout
8. Performance Data
Input Power at No Load 72 mW 76 mW 92 mW 107 mW
Input Power at 0.5 W Load 760 mW 760 mW 785 mW 805 mW
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7602C • Rev. 1.0.1 16
Figure 28. PCB Layout Recommendations
85 VAC 110 VAC 220 VAC 265 VAC
OLP Point 4.73 A 5.07 A 5.11 A 4.91 A
Page 18
Page 19
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