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FAN400A Datasheet(PDF) 5 Page - Fairchild Semiconductor

No. de pieza FAN400A
Descripción Electrónicos  Low-Power Green-Mode PWM Flyback Power Controller
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN400A Datasheet(HTML) 5 Page - Fairchild Semiconductor

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© 2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN400A Rev. 1.0.2
5
Electrical Characteristics
Unless otherwise noted, VDD=15V and TA=25°C.
Symbol
Parameter
Conditions
Min.
Typ.
Max. Units
VDD Section
With Secondary
Feedback
20
V
VDD-OP
Continuously Operation Voltage
Without Secondary
Feedback
22.7
V
VDD-ON
Turn-on Threshold Voltage
16
17
18
V
VDD-OFF
Turn-off Threshold Voltage
7.5
8.0
8.5
V
IDD-ST
Startup Current
VDD=VDD-ON – 0.1V
8
20
μA
IDD-OP
Operating Supply Current
CL=1nF
3.6
4.6
mA
VDD-G OFF
VDD Low-threshold Voltage to Exit
Green-off Mode
VDD-OFF+1.2
V
Feedback Input Section
AV
Input-Voltage to Current-Sense Attenuation
0.3
V/V
ZFB
Input Impedance
IFB=0.1mA to 0.2mA
4.6
kΩ
VFB-OPEN Open-Loop Voltage
4.5
V
FB is Open
20.7
22.7
24.7
V
VDD-FB
VDD Feedback Threshold Voltage
IFB=0.4mA
18.4
20.4
22.4
V
Current-Sense Section
tPD
Propagation Delay
100
150
ns
VDD=18V
0.81
V
VDD=15V
0.73
V
VSTHVA
Current Limit Valley Threshold Voltage
VDD=10V
0.58
V
VDD=18V
1.10
V
VDD=15V
1.01
V
VSTHFL
Current Limit Flat Threshold Voltage
VDD=10V
0.81
V
tLEB
Leading-Edge Blanking Time
250
310
370
ns
Figure 5.
Saw Limit


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