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FAN6751MR Datasheet(PDF) 6 Page - Fairchild Semiconductor

No. de pieza FAN6751MR
Descripción Electrónicos  Highly-Integrated Green-Mode PWM Controller
Download  13 Pages
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN6751MR Datasheet(HTML) 6 Page - Fairchild Semiconductor

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© 2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6751MR • Rev. 1.0.0
6
Electrical Characteristics
VDD=15V, TA=25°C, unless otherwise noted.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
Feedback Input Section
AV
Input Voltage to Current-Sense
Attenuation
1/4.5
1/4.0
1/3.5
V/V
ZFB
Input Impedance
4
7
kΩ
VFB-OPEN
Output High Voltage
FB Pin Open
5.5
V
VFB-OLP
FB Open-loop Trigger Level
5.0
5.2
5.4
V
tD-OLP
Delay Time of FB Pin Open-loop
Protection
56
ms
VFB-N
Green-Mode Entry FB Voltage
2.1
V
VFB-G
Green-Mode Ending FB Voltage
1.6
V
VFB-ZDC
Zero Duty-Cycle Input Voltage
1.1
V
Current-Sense Section
ZSENSE
Input Impedance
12
KΩ
VTH-P at
VIN=1V
Threshold Voltage for Current Limit
VIN=1V
0.80
0.83
0.86
V
VTH-P at
VIN=3V
Threshold Voltage for Current Limit
VIN=3V
0.67
0.70
0.73
V
tPD
Delay to Output
100
200
ns
tLEB
Leading-Edge Blanking Time
230
280
330
ns
VS-SCP
Threshold Voltage for SENSE Short-
Circuit Protection
0.10
0.15
0.20
V
tD-SSCP
Delay Time for SENSE Short-Circuit
Protection
VSENSE<0.15V
100
150
200
µs
TSS
Period During Soft-Startup Time
Startup Time
4.5
5.0
5.5
ms
Figure 5. VFB vs. PWM Frequency
PWM Frequency
fOSC
fOSC-G
VFB-N
VFB-G
VFB-ZDC
VFB


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