FAN7528_07 [FAIRCHILD]
Dual-Output, Critical Conduction Mode PFC Controller; 双路输出，临界导通模式PFC控制器
| 型号： | FAN7528_07 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Dual-Output, Critical Conduction Mode PFC Controller |
| 文件： | 总21页 (文件大小：2594K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
February 2007
FAN7528
Dual-Output, Critical Conduction Mode PFC Controller
Features
Description
Low Total Harmonic Distortion (THD)
Dual Output Voltage Control
The FAN7528 is an active power factor correction (PFC)
controller for boost PFC applications that operates in
critical conduction mode (CRM). It uses voltage mode
PWM that compares an internal ramp signal with the
error amplifier output to generate MOSFET turn-off sig-
nal. Because the voltage mode CRM PFC controller does
not need the rectified AC line voltage information, it can
save the power loss of the input voltage sensing network
necessary for the current mode CRM PFC controller.
Precise Adjustable Output Over-Voltage Protection
Open-Feedback Protection and Disable Function
Zero Current Detector
160µs Internal Start-up Timer
MOSFET Over-Current Protection
Under-Voltage Lockout with 3.5V Hysteresis
Low Start-up (40µA) and Operating Current (1.5mA)
Totem-Pole Output with High State Clamp
±400mA Peak Gate Drive Current
8-Pin DIP or 8-Pin SOP
The FAN7528 provides the dual-output voltage control
function without the AC line voltage sensing for adapter
applications. It changes the PFC output voltage accord-
ing to the AC line voltage.
It provides protection functions such as over-voltage pro-
tection, open-feedback protection, over-current protec-
tion, and under-voltage lockout protection. The FAN7528
can be disabled if the INV pin voltage is lower than 0.45V
and the operating current decreases to 65µA. Using a
new variable on-time control method, THD is lower than
the conventional CRM boost PFC ICs.
Applications
Adapter
Related Application Notes
AN-6012: Design of Power Factor Correction Circuit
Using FAN7528
Ordering Information
OperatingTemp.
Marking
Part Number
FAN7528N
Range
Pb-Free
Yes
Package
8-DIP
Packing Method
Code
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Rail
Rail
FAN7528
FAN7528
FAN7528
FAN7528M
Yes
8-SOP
8-SOP
FAN7528MX
Yes
Tape & Reel
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
Typical Application Diagrams
L
D
VO
AC IN
NAUX
VAUX
R2
RZCD
ZCD
CO
VCC
FAN7528
INV
MOT
CS
COMP
R1
GND
FAN7528 Rev. 1.01
Figure 1. Typical Boost PFC Application
Internal Block Diagram
2.5V
Ref
8
Vref
VCC
UVLO
Vcc
Internal
Bias
Drive
Output
OUT
Disable
7
12V 8.5V
160μs
Timer
13V
5
ZCD
S
Q
6.7V
1.4V 1.5V
R
Zero Current
Detector
OVP
2.55V
2.66V
4
CS
Disable
40k
0.45V 0.35V
8pF
0.8V
OCP
Comparator
VCC=8.5V Reference Set
=4.5V Reference Reset
V
CC
Ramp
Signal
Dual-Output Reference
Generator
1V Offset
1.5V/2.5V
Sawtooth
Generator
Error
Amplifier
3
MOT
Gm
INV
1
1V ~ 5V
Range
6
2
GND
COMP
FAN7528 Rev. 1.00
Figure 2. Functional Block Diagram of FAN7528
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
2
Pin Assignments
VCC
8
OUT
7
GND
6
ZCD
5
W W W
F A N 7 5 2 8
1
2
3
4
INV
COMP
MOT
CS
FAN7528 Rev. 1.00
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin #
Name
Description
This pin is the inverting input of the error amplifier. The output voltage of the boost PFC
converter should be resistively divided to 2.5V at the high line condition and connected
to this pin. If this pin voltage is controlled to be lower than 0.45V, the device is
disabled.
1
INV
This pin is the output of the transconductance error amplifier. Some components for
the output voltage compensation should be connected between this pin and GND.
2
3
COMP
MOT
This pin is used to set the slope of the internal ramp. The voltage of this pin is
maintained to be 1V. If a resistor is connected between this pin and GND, current flows
out of the pin and the slope of the internal ramp is proportional to this current.
This pin is the input of the over-current protection comparator. The MOSFET current is
sensed using a sensing resistor and the resulting voltage is applied to this pin. An
internal RC filter is included to filter switching noise. This pin is sensitive to the
negative voltage below -0.3V. For proper operation, the stray inductance in the sensing
path and the inductance of the sensing resistor must be minimized.
4
CS
This pin is the input of the zero current detection block. If the voltage of this pin goes
higher than 1.5V, then lower than 1.4V, the MOSFET is turned on.
5
6
ZCD
GND
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.
This pin is the gate drive output. The peak sourcing and sinking current level is
400mA. For proper operation, the stray inductance in the gate driving path must be
minimized.
7
8
OUT
VCC
This pin is the IC supply pin. IC current and MOSFET drive current are supplied using
this pin.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
3
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be opera-
ble above the recommended operating conditions and stressing the parts to these levels is not recommended. In addi-
tion, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. TA = 25°C unless otherwise specified.
Symbol
VCC
Parameter
Value
23
Unit
V
Supply Voltage
IOH, IOL
Iclamp
Idet
Peak Drive Output Current
±400
mA
mA
mA
V
Driver Output Clamping Diodes VO > VCC or VO < -0.3V
Detector Clamping Diodes
±10
±10
VIN
Error Amp, MOT, CS Input Voltages
Operating Junction Temperature
Operating Temperature Range
Storage Temperature Range
Human Body Model
-0.3 to 6
150
TJ
°C
°C
°C
kV
V
TA
-40 to 125
-65 to 150
2.0
TSTG
ESD
Machine Model
300
Thermal Impedance
Symbol
Parameter
Value
110
Unit
°C/W
°C/W
8-DIP
θJA
Thermal Resistance, Junction-to-Ambient
8-SOP
150
Note:
1. Regarding the test environment and PCB type, please refer to JESD51-2 and JESD51-10.
© 2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7528 Rev. 1.0.6
4
Electrical Characteristics
VCC = 14V, TA = -40°C~125°C, unless otherwise specified.
Symbol
Parameter
Condition
Min.
Typ.
Max.
Unit
Under-Voltage Lockout Section
VTH(start)
VTH(stop)
HY(uvlo)
Start Threshold Voltage
Stop Threshold Voltage
UVLO Hysteresis
VCC increasing
11
8.0
3.0
12
8.5
3.5
13
9.0
4.0
V
V
V
VCC decreasing
Supply Current Section
IST Start-up Supply Current
ICC
IDCC
ICC(dis)
VCC = VTH(start) – 0.2V
Output no switching
50kHz, CL=1nF
Vinv = 0V
40
1.5
2.5
65
70
3.0
4.0
90
μA
mA
mA
μA
Operating Supply Current
Dynamic Operating Supply Current
Operating Current at Disable
40
Error Amplifier Section
TA = 25°C
2.465 2.500
2.435 2.500
2.535
2.565
1.55
V
V
Vref1
Voltage Feedback Input Threshold1
Vref2
ΔVref1
ΔVref3
Ib(ea)
Voltage Feedback Input Threshold2
Line Regulation
1.45
1.50
0.1
20
V
VCC = 14V~23V
10.0
mV
mV
μA
μA
μA
V
(1)
Temperature Stability of Vref1
Input Bias Current
Vinv = 1V~4V
Vinv = 2.4V
Vinv = 2.6V
-0.5
0.5
Isource
Isink
Output Source Current
-12
12
Output Sink Current
Veao(H)
Veao(Z)
gm
Output Upper Clamp Voltage
Zero Duty Cycle Output Voltage
Transconductance(1)
4.5
0.7
90
5.5
1.0
115
1.30
4.5
6.5
1.3
V
140
1.36
6.0
μmho
V
VTH(in)
VTH(reset)
Output Voltage Selection Threshold
Output Voltage Reset Threshold(1)
TA = 25°C
1.24
3.0
V
Maximum On-Time Section
Vmot
Maximum On-time Voltage
Maximum On-time Programming
Rmot = 13.7k
0.95
18.0
1.00
22.5
1.05
27.0
V
tON-max
Rmot = 13.7k, TA = 25°C
μs
Current Sense Section
Current Sense Input Threshold
Voltage Limit
VCS(limit)
0.7
0.8
0.9
V
Ib(cs)
td(cs)
Input Bias Current
Current Sense Delay to Output(1)
VCS = 0V~1V
-1.0
-0.1
350
1.0
μA
500
ns
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
5
Electrical Characteristics (Continued)
VCC = 14V, TA = -40°C~125°C, unless otherwise specified.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
Zero Current Detection Section
VTH(ZCD)
HY(ZCD)
Vclamp(h)
Vclamp(l)
Ib(ZCD)
Input Voltage Threshold(1)
Detect Hysteresis(1)
1.35
0.05
6.0
0
1.50
0.10
6.7
1.65
0.15
7.4
1.0
1.0
-10
10
V
V
Input High Clamp Voltage
Input Low Clamp Voltage
Input Bias Current
Source Current Capability(1)
Sink Current Capability(1)
Idet = 3mA
V
Idet = -3mA
0.6
V
VZCD = 1V~5V
-1.0
-0.1
μA
mA
mA
Isource(zcd)
Isink(zcd)
Maximum Delay from ZCD to Output
Turn-on(1)
tdead
100
9.2
200
ns
Output Section
VOH
VOL
Output Voltage High
IO = -100mA
IO = 100mA
11.0
1.0
50
12.8
2.5
V
V
Output Voltage Low
Rising Time(1)
Falling Time(1)
tr
CL = 1nF
100
100
14.5
1
ns
ns
V
tf
CL = 1nF
50
VO(max)
VO(uvlo)
Restart Timer Section
Maximum Output Voltage
VCC = 20V, IO = 100μA
11.5
40
13.0
Output Voltage with UVLO Activated VCC = 5V, IO = 100μA
V
td(rst)
Restart Timer Delay
160
360
μs
Over-Voltage Protection Section
VOVP
OVP Threshold Voltage
OVP Hysteresis
TA = 25°C
2.60
0.06
2.66
0.11
2.72
0.16
V
V
HY(ovp)
Enable Section
VTH(en)
HY(en)
Enable Threshold Voltage
Enable Hysteresis
0.40
0.05
0.45
0.10
0.50
0.15
V
V
Note:
1. These parameters, although guaranteed by design, are not tested in production.
© 2005 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7528 Rev. 1.0.6
6
Typical Performance Characteristics
12.8
12.4
12.0
11.6
11.2
9.2
8.8
8.4
8.0
7.6
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Temperature [°C]
Figure 4. Start Threshold Voltage vs. Temp.
Figure 5. Stop Threshold Voltage vs. Temp.
70
60
50
40
30
20
10
0
4.0
3.8
3.6
3.4
3.2
3.0
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Temperature [°C]
Figure 6. UVLO Hysteresis vs. Temp.
Figure 7. Start-up Supply Current vs. Temp.
3.0
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5
2.0
1.5
1.0
0.5
0.0
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 8. Operating Supply Current vs. Temp.
Figure 9. Dynamic Operating Current vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
7
Typical Performance Characteristics (Continued)
90
80
70
60
50
40
2.56
2.54
2.52
2.50
2.48
2.46
2.44
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 10. ICC at Disable vs. Temp.
Figure 11. Vref1 vs. Temp.
0.4
0.2
1.54
1.52
1.50
1.48
1.46
0.0
-0.2
-0.4
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 12. Vref2 vs. Temp.
Figure 13. Input Bias Current vs. Temp.
-6
-9
18
15
12
9
-12
-15
-18
6
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 14. Error Amp. Source Current vs. Temp.
Figure 15. Error Amp. Sink Current vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
8
Typical Performance Characteristics (Continued)
6.5
6.0
5.5
5.0
4.5
1.3
1.2
1.1
1.0
0.9
0.8
0.7
-60 -40 -20
0
20 40 60 80 100 120 140
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Temperature [°C]
Figure 16. Error Amp. Clamp Voltage vs. Temp.
Figure 17. Zero Duty Output Voltage vs. Temp.
1.36
1.34
1.32
1.30
1.28
1.26
1.24
1.04
1.02
1.00
0.98
0.96
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 18. Output Select Threshold vs. Temp.
Figure 19. MOT Pin Voltage vs. Temp.
0.88
0.84
0.80
0.76
0.72
26
24
22
20
18
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 20. Maximum On-Time vs. Temp.
Figure 21. Current Limit vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
9
Typical Performance Characteristics (Continued)
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
0.9
0.6
0.3
0.0
-0.3
-0.6
-0.9
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 22. CS Input Bias Current vs. Temp.
Figure 23. ZCD Input High Clamp vs. Temp.
1.0
0.8
0.6
0.4
0.2
0.0
0.8
0.4
0.0
-0.4
-0.8
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 24. ZCD Input Low Clamp vs. Temp.
Figure 25. ZCD Input Bias Current vs. Temp.
2.5
2.0
1.5
1.0
0.5
0.0
12.5
12.0
11.5
11.0
10.5
10.0
9.5
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 26. Output Voltage High vs. Temp.
Figure 27. Output Voltage Low vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
10
Typical Performance Characteristics (Continued)
14.5
14.0
13.5
13.0
12.5
12.0
11.5
1.0
0.8
0.6
0.4
0.2
0.0
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 28. Maximum Output Voltage vs. Temp.
Figure 29. Output Voltage when UVLO vs. Temp.
400
350
300
250
200
150
100
50
2.74
2.72
2.70
2.68
2.66
2.64
2.62
2.60
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 30. Restart Timer Delay vs. Temp.
Figure 31. Over-Voltage Protection vs. Temp.
0.14
0.12
0.10
0.08
0.06
0.50
0.48
0.46
0.44
0.42
0.40
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 32. OVP Hysteresis vs. Temp.
Figure 33. Enable Threshold Voltage vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
11
Typical Performance Characteristics (Continued)
0.14
0.12
0.10
0.08
0.06
-60 -40 -20
0
20 40 60 80 100 120 140
Temperature [°C]
Figure 34. Enable Hysteresis vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
12
Applications Information
1. Error Amplifier Block
1.2 Over-Voltage Protection Function
The error amplifier block has several functions, such as
dual output function, over-voltage protection function,
and disable function.
The control speed of the PFC converter is very slow;
therefore, the over-voltage protection (OVP) of the out-
put voltage is very important. The FAN7528 provides a
precise OVP function that shuts down the drive circuit
when the INV pin voltage exceeds 2.66V and there is
0.11V hysteresis.
1.1 Dual-Output Function
Unlike conventional CRM PFC controllers, the FAN7528
has the dual-output control function according to the AC
line voltage without sensing the rectified AC line voltage.
Because the output voltage of the boost converter is pro-
portional to the peak voltage of the input AC line voltage
before the boost converter starts switching, the INV pin
voltage represents the peak AC line voltage. When the
AC line is connected to the boost converter, VCC voltage
starts to increase from zero voltage. If the VCC voltage
reaches 8.5V, the dual-output reference generator com-
pares the INV pin voltage with 1.3V reference and, if the
INV pin voltage is lower than 1.3V, the dual-output refer-
ence generator sets the reference voltage of the error
amplifier to 1.5V. If the INV pin voltage is higher than
1.3V, the reference voltage is set to 2.5V. That means if
the output voltage of the boost converter is set to 400V at
high line, the output voltage is 240V (400V*1.5/2.5) at
low line. If the output voltage is set to 390V at high line,
the output voltage is 234V at low line. Because this block
does not need the input voltage sensing network, the
power loss and cost related with the sensing network
can be saved. The reference voltage of the error ampli-
fier is not reset until VCC goes below 4.5V.
1.3 Disable Function
If the INV pin voltage is lower than 0.45V, most of the
internal block is disabled, the operating current is
reduced to be 65µA, and there is 0.1V hysteresis in the
comparator.
1.4 Error Amplifier
The error amplifier is a transconductance type amplifier.
The output current of the amplifier is proportional to the
voltage difference between the inverting input and the
non-inverting input of the amplifier. Some resistors and
capacitors should be connected to the error amplifier
output pin, the COMP pin, for the output voltage loop
compensation.
2. Zero Current Detection Block
The zero current detector (ZCD) generates the turn-on
signal of the MOSFET when the boost inductor current
reaches zero using an auxiliary winding coupled with the
inductor. If the voltage of the ZCD pin goes higher than
1.5V, the ZCD comparator waits until the voltage goes
below 1.4V. If the voltage goes below 1.4V, the zero cur-
rent detector turns on the MOSFET. The ZCD pin is pro-
tected internally by two clamps, 6.7V high clamp and
0.6V low clamp. The 160µs timer generates a MOSFET
turn-on signal if the drive output has been low for more
than 160µs from the falling edge of the drive output.
2.66V
2.55V
OVP
Disable
0.45V 0.35V
Dual-Output
Reference
Generator
VOUT
Turn-on
Signal
Error Amp
160μs
Timer
1.5V/2.5V
VIN
INV
Gm
ZCD
1
5
S
RZCD
Q
6.7V
1.4V
1.5V
2
Zero Current
Detector
R
COMP
FAN7528 Rev. 1.00
Figure 36. Zero Current Detector Block
FAN7528 Rev. 1.00
Figure 35. Error Amplifier Block
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
13
3. Sawtooth Generator Block
4. Over-Current Protection Block
The output of the error amplifier and the output of the
sawtooth generator are compared to determine the
MOSFET turn-off instance. The slope of the sawtooth is
determined by an external resistor connected to the
MOT pin. The voltage of the MOT pin is 1V and the slope
is proportional to the current flowing out of the MOT pin.
The internal ramp signal has 1V offset; therefore, the
drive output is shut down if the voltage of the COMP pin
is lower than 1V. The MOSFET on-time is maximum
when the COMP pin voltage is 5V. According to the slope
of the internal ramp, the maximum on-time can be pro-
grammed. The necessary maximum on-time depends on
the boost inductor, lowest AC line voltage, and maximum
output power. The resistor value should be designed
properly.
The MOSFET current is sensed using an external sens-
ing resistor for the over-current protection. If the CS pin
voltage is higher than 0.8V, the over-current protection
comparator generates a protection signal. An internal RC
filter is included to filter switching noise.
OCP
Signal
40k
4
CS
8pF
Over-Current
Protection
Comparator
0.8V
FAN7528 Rev. 1.00
Figure 38. Over-Current Protection Block
Off Signal
1V
5. Switch Drive Block
MOT
Sawtooth
Generator
The FAN7528 contains a single totem-pole output stage
designed for a direct drive of power MOSFET. The drive
output is capable of up to 400mA peak current with a typ-
ical rise and fall time of 50ns with 1nF load. The output
voltage is clamped to be 13V to protect MOSFET gate
even if the VCC voltage is higher than 13V.
3
1V
Error Amp
Output
FAN7528 Rev. 1.00
6. Under-Voltage Lockout Block
Figure 37. Sawtooth Generator Block
If the VCC voltage reaches 12V, the IC’s internal blocks
are enabled and start operation. If the VCC voltage drops
below 8.5V, most of the internal blocks are disabled to
reduce the operating current. VCC voltage should be
higher than 8.5V under normal conditions.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
14
Typical Application Circuit
Application
Output power
Input voltage
Output voltage
Universal input
(90~264 Vac)
Adapter
100W
389V/232V
Features
High efficiency (>90% at 90 Vac input)
Low THD (total harmonic distortion) (<10% at 264 Vac input)
Dual-output control
Key Design Notes
Diode D4 is used to prevent IC malfunction that can happen if the CS pin voltage is lower than -0.3V.
Important components for low THD are R2, R5, and C11.
1. Schematic
T1
PFC OUTPUT
VAUX
D2
BD
C5
R4
R3
R5
R10
D3
R6
C10
Q1
NTC
ZD1
D1
7
C11
6
C9
C3
C4
8
1
5
C2
R9
LF1
FAN7528
R2
C1
V1
R11
2
3
4
R8
C8
R7
F1
C7 R1
D4
C6
FAN7528 Rev. 1.00
AC INPUT
Figure 39. Schematic
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
15
2. Inductor Schematic Diagram
1
NVcc
2
3
Np
5
FAN7528 Rev. 1.00
Figure 40. Inductor Schematic Diagram
3. Winding Specification
No
Pin (s→f)
5 → 3
Wire
0.2φ × 10
Turns
Winding Method
Np
44
Solenoid Winding
Insulation: Polyester Tape t = 0.050mm, 4 Layers
NVcc 2 → 1
0.2φ × 1
6
Solenoid Winding
Outer Insulation: Polyester Tape t = 0.050mm, 4 Layers
Air Gap: 0.6mm for each leg
4. Electrical Characteristics
Pin
Specification
Remarks
Inductance
3–5
400µH ± 10%
100kHz, 1V
5. Core & Bobbin
Core: EI 3026
Bobbin: EI3026
Ae(mm2): 111
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
16
6. Demo Circuit Part List
Part
Value
3A/250V
10D-9
Note
Part
Value
Note
Fuse
NTC
Inductor
F1
T1
400µH
EI3026
NTC
MOSFET
Resistor
Q1
FQPF13N50C
Fairchild
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
10kΩ
1/4W
1/4W
1/2W
1/2W
1/4W
1/4W
1/2W
1/4W
1/4W
1/4W
1/4W
370kΩ
330kΩ
150Ω
20kΩ
10Ω
Diode
D1
D2
1N4148
BYV26C
1N5819
1N5819
1N4746
Fairchild
600V, 1A
Fairchild
Fairchild
18V
D3
D4
0.22Ω
10kΩ
10kΩ
2MΩ
ZD1
Bridge Diode
KBL06
BD
LF1
IC1
V1
600V/4A
Wire 0.4mm
Fairchild
470V
12.9kΩ
Capacitor
Line Filter
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
150nF/275VAC
330nF/275VAC
2.2nF/3kV
2.2nF/3kV
150nF/630V
47uF/25V
Box Capacitor
Box Capacitor
40mH
FAN7528
471
Ceramic Capacitor
Ceramic Capacitor
Film Capacitor
IC
Electrolytic Capacitor
Ceramic Capacitor
MLCC
TNR
47nF/50V
220nF
100µF/450V
12nF/100V
47pF/50V
Electrolytic Capacitor
Film Capacitor
Ceramic Capacitor
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
17
7. Layout
Separate the power ground and the
signal ground
Power Ground
Signal Ground
Place the output voltage sensing resistors
close to IC
Figure 41. PCB Layout Considerations for FAN7528
8. Performance Data
90 Vac
0.999
3.5%
110 Vac
0.998
3.6%
220 Vac
0.991
264 Vac
0.983
100W
50W
PF
THD
PF
6.1%
7.3%
0.997
5.1%
0.996
5.5%
0.971
0.947
THD
11.1%
13.0%
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
18
Mechanical Dimensions
8-DIP
Dimensions are in millimeters unless otherwise noted.
Figure 42. 8-Lead Dual In-Line Package (DIP)
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
19
Mechanical Dimensions
8-SOP
Dimensions are in millimeters unless otherwise noted.
Figure 43. 8-Lead Small Outline Package (SOP)
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
20
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
21
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