FAN7621B Fairchild Semiconductor, FAN7621B Datasheet - Page 5

• Manufacturer Part Number: FAN7621B
• Description: The FAN7621B is a pulse frequency modulation controller for high-efficiency half-bridge resonant converters
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN7621B • Rev. 1.0.1
Electrical Characteristics
T
Supply Section
UVLO Section
Oscillator & Feedback Section
Output Section
A
=25°C and LV
HV
LV
HV
LV
HV
Symbol
LV
I
I
V
V
I
I
Q
O
Q
O
I
V
V
V
CONDIS
V
CC
CC
CC
CONEN
f
source
HV
HV
CC
V
LV
LV
CC
DC
I
CC
OSC
f
t
I
sink
HOH
HOL
LOH
LK
SS
SS
t
LOL
t
RT
UVH
r
f
UV+
UVH
UV+
UV-
UV-
CC
CC
CC
CC
Offset Supply Leakage Current
Quiescent HV
Quiescent LV
Operating HV
(RMS Value)
Operating LV
(RMS Value)
LV
LV
LV
HV
HV
HV
Control Pin Disable Threshold Voltage
Control Pin Enable Threshold Voltage
V-I Converter Threshold Voltage
Output Oscillation Frequency
Output Duty Cycle
Internal Soft-Start Initial Frequency
Internal Soft-Start Time
Peak Sourcing Current
Peak Sinking Current
Rising Time
Falling Time
High Level of High-Side Gate Driving
Signal (V
Low Level of High-Side Gate Driving
Signal
High Level of High-Side Gate Driving
Signal (V
Low Level of High-Side Gate Driving
Signal
CC
CC
CC
CC
CC
CC
CC
=17V unless otherwise specified.
Supply Under-Voltage Positive Going Threshold (LV
Supply Under-Voltage Negative Going Threshold (LV
Supply Under-Voltage Hysteresis
Supply Under-Voltage Negative Going Threshold (HV
Supply Under-Voltage Positive Going Threshold (HV
Supply Under-Voltage Hysteresis
HVCC
LVCC
-V
CC
Parameter
-V
CC
CC
CC
LO
HO
Supply Current
Supply Current
Supply Current
Supply Current
)
)
HV
(HV
(LV
f
C
No Switching, V
f
C
No Switching, V
R
f
HV
HV
C
I
OSC
OSC
SS
O
Load
Load
T
Load
=20mA
5
=5.2kΩ
=f
CC
CC
CC
CC
CC
=100kHz, V
=100kHz, V
OSC
Test Conditions
=1nF
=1nF
=1nF, HV
=V
=17V
=17V
UV+) - 0.1V
UV+) - 0.1V
+40kHz, R
CTR
CC
CON
CON
CON
CON
=17V
CC
CC
CC
T
CC
=5.2kΩ
> 0.6V,
> 0.6V,
< 0.4V
< 0.4V
Start)
Start)
Stop)
Stop)
Min.
0.36
0.54
11.2
8.90
250
460
8.2
7.8
1.5
94
48
2
10.00
Typ.
12.5
0.40
0.60
100
100
100
140
360
600
2.5
9.2
8.7
0.5
2.0
50
50
65
35
5
6
2
3
11.10
Max.
13.8
10.2
0.44
0.66
120
200
200
106
9.6
2.5
1.0
0.6
1.0
0.6
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50
52
8
9
4
4
Unit
kHz
kHz
mA
mA
mA
mA
mA
ms
μA
μA
μA
μA
ns
ns
%
V
V
V
V
V
V
V
V
V
V
V
V
V