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FAN7621N Datasheet(PDF) 5 Page - Fairchild Semiconductor

Part # FAN7621N
Description  PFM Controller for Half-Bridge Resonant Converters
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN7621N Datasheet(HTML) 5 Page - Fairchild Semiconductor

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© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7621 • Rev. 1.0.1
5
Electrical Characteristics
TA=25°C and LVCC=17V unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Supply Section
ILK
Offset Supply Leakage Current
HVCC=VCTR
50
μA
IQHVCC
Quiescent HVCC Supply Current
(HVCCUV+) - 0.1V
50
120
μA
IQLVCC
Quiescent LVCC Supply Current
(LVCCUV+) - 0.1V
100
200
μA
fOSC=100kHz, VCON > 0.6V,
CLoad=1nF
5
8
mA
IOHVCC
Operating HVCC Supply Current
(RMS Value)
No Switching, VCON < 0.4V
100
200
μA
fOSC=100kHz, VCON > 0.6V,
CLoad=1nF
6
9
mA
IOLVCC
Operating LVCC Supply Current
(RMS Value)
No Switching, VCON < 0.4V
2
4
mA
UVLO Section
LVCCUV+
LVCC Supply Under-Voltage Positive Going Threshold (LVCC Start)
13.0
14.5
16.0
V
LVCCUV-
LVCC Supply Under-Voltage Negative Going Threshold (LVCC Stop)
10.2
11.3
12.4
V
LVCCUVH
LVCC Supply Under-Voltage Hysteresis
3.2
V
HVCCUV+
HVCC Supply Under-Voltage Positive Going Threshold (HVCC Start)
8.2
9.2
10.2
V
HVCCUV-
HVCC Supply Under-Voltage Negative Going Threshold (HVCC Stop)
7.8
8.7
9.6
V
HVCCUVH
HVCC Supply Under-Voltage Hysteresis
0.5
V
Oscillator & Feedback Section
VCONDIS
Control Pin Disable Threshold Voltage
0.36
0.40
0.44
V
VCONEN
Control Pin Enable Threshold Voltage
0.54
0.60
0.66
V
VRT
V-I Converter Threshold Voltage
1.5
2.0
2.5
V
fOSC
Output Oscillation Frequency
94
100
106
kHz
DC
Output Duty Cycle
RT=5.2kΩ
48
50
52
%
fSS
Internal Soft-Start Initial Frequency
fSS=fOSC+40kHz, RT=5.2kΩ
140
kHz
tSS
Internal Soft-Start Time
2
3
4
ms
Output Section
Isource
Peak Sourcing Current
HVCC=17V
250
360
mA
Isink
Peak Sinking Current
HVCC=17V
460
600
mA
tr
Rising Time
65
ns
tf
Falling Time
CLoad=1nF, HVCC=17V
35
ns
VHOH
High Level of High-Side Gate Driving
Signal (VHVCC-VHO)
1.0
V
VHOL
Low Level of High-Side Gate Driving
Signal
0.6
V
VLOH
High Level of High-Side Gate Driving
Signal (VLVCC-VLO)
1.0
V
VLOL
Low Level of High-Side Gate Driving
Signal
IO=20mA
0.6
V


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