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Número de pieza | FAN7528 | |
Descripción | Critical Conduction Mode PFC Controller | |
Fabricantes | Fairchild Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de FAN7528 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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FAN7528
Dual-Output, Critical Conduction Mode PFC Controller
www.DataSheet4U.com
Features
Low Total Harmonic Distortion (THD)
Dual Output Voltage Control
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
Applications
Adapter
Related Application Notes
AN-6012: Design of Power Factor Correction Circuit
Using FAN7528
Description
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.
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.
Ordering Information
Part Number
FAN7528N
FAN7528M
FAN7528MX
Operating Temp.
Range
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Pb-Free
Yes
Yes
Yes
Package
8-DIP
8-SOP
8-SOP
Packing Method
Rail
Rail
Tape & Reel
Marking
Code
FAN7528
FAN7528
FAN7528
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
www.fairchildsemi.com
1 page Electrical Characteristics
VCC = 14V, TA = -40°C~125°C, unless otherwise specified.
Symbol
Parameter
Condition
Under-Voltage Lockout Section
VTH(start)
VTH(stop)
HY(uvlo)
Start Threshold Voltage
Stop Threshold Voltage
UVLO Hysteresis
VCC increasing
VCC decreasing
Supply Current Section
IST Start-up Supply Current
ICC Operating Supply Current
IDCC
Dynamic Operating Supply Current
ICC(dis) Operating Current at Disable
Error Amplifier Section
VCC = VTH(start) – 0.2V
Output no switching
50kHz, CL=1nF
Vinv = 0V
Vref1
Voltage Feedback Input Threshold1 TA = 25°C
Vref2
ΔVref1
ΔVref3
Ib(ea)
Isource
Isink
Veao(H)
Veao(Z)
gm
Voltage Feedback Input Threshold2
Line Regulation
Temperature Stability of Vref1(1)
Input Bias Current
Output Source Current
Output Sink Current
Output Upper Clamp Voltage
Zero Duty Cycle Output Voltage
Transconductance(1)
VTH(in)
VTH(reset)
Output Voltage Selection Threshold
Output Voltage Reset Threshold(1)
Maximum On-Time Section
Vmot
Maximum On-time Voltage
tON-max Maximum On-time Programming
Current Sense Section
VCS(limit)
Current Sense Input Threshold
Voltage Limit
Ib(cs)
td(cs)
Input Bias Current
Current Sense Delay to Output(1)
VCC = 14V~23V
Vinv = 1V~4V
Vinv = 2.4V
Vinv = 2.6V
TA = 25°C
Rmot = 13.7k
Rmot = 13.7k, TA = 25°C
VCS = 0V~1V
Min. Typ. Max. Unit
11 12 13
8.0 8.5 9.0
3.0 3.5 4.0
V
V
V
40 70 μA
1.5 3.0 mA
2.5 4.0 mA
40 65 90 μA
2.465
2.435
1.45
-0.5
4.5
0.7
90
1.24
3.0
2.500
2.500
1.50
0.1
20
-12
12
5.5
1.0
115
1.30
4.5
2.535
2.565
1.55
10.0
0.5
6.5
1.3
140
1.36
6.0
V
V
V
mV
mV
μA
μA
μA
V
V
μmho
V
V
0.95 1.00 1.05
18.0 22.5 27.0
V
μs
0.7 0.8 0.9
-1.0 -0.1 1.0
350 500
V
μA
ns
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
5
www.fairchildsemi.com
5 Page Typical Performance Characteristics (Continued)
14.5
14.0
13.5
13.0
12.5
12.0
11.5
-60 -40 -20
0 20 40 60 80 100 120 140
Temperature [°C]
Figure 28. Maximum Output Voltage vs. Temp.
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]
Figure 29. Output Voltage when UVLO vs. Temp.
400
350
300
250
200
150
100
50
-60 -40 -20
0 20 40 60 80 100 120 140
Temperature [°C]
Figure 30. Restart Timer Delay vs. Temp.
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]
Figure 31. Over-Voltage Protection vs. Temp.
0.14
0.12
0.10
0.08
0.06
-60 -40 -20
0 20 40 60 80 100 120 140
Temperature [°C]
Figure 32. OVP Hysteresis vs. Temp.
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]
Figure 33. Enable Threshold Voltage vs. Temp.
© 2005 Fairchild Semiconductor Corporation
FAN7528 Rev. 1.0.6
11
www.fairchildsemi.com
11 Page |
Páginas | Total 21 Páginas | |
PDF Descargar | [ Datasheet FAN7528.PDF ] |
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