FSFR2100 Fairchild Semiconductor, FSFR2100 Datasheet - Page 10

IC SWIT PROG OVP OCP 9SIP

FSFR2100

Manufacturer Part Number
FSFR2100
Description
IC SWIT PROG OVP OCP 9SIP
Manufacturer
Fairchild Semiconductor
Series
FPS™r
Datasheet

Specifications of FSFR2100

Output Isolation
Isolated
Frequency Range
94kHz ~ 106kHz
Voltage - Input
9.6 V ~ 25 V
Voltage - Output
500V
Power (watts)
400W
Operating Temperature
-40°C ~ 130°C
Package / Case
9-SIP
Output Voltage
24 V
Output Current
8.3 A
Output Power
450 W
Switching Frequency
300 KHz
Operating Temperature Range
- 40 C to + 130 C
Mounting Style
Through Hole
Duty Cycle (max)
52 %
Isolated/non-isolated
Isolated
For Use With
FEB212 - BOARD EVAL FOR FSFR2100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
FSFR2100
Manufacturer:
FAIRCHILD
Quantity:
32
Company:
Part Number:
FSFR2100,,10,SIP-9,FAIRCHILD
0
Part Number:
FSFR2100U
Manufacturer:
Fairchild Semiconductor
Quantity:
1 885
Part Number:
FSFR2100XS
Manufacturer:
RENESAS
Quantity:
2 500
© 2007 Fairchild Semiconductor Corporation
FSFR2100 • Rev.1.0.8
in Figure 19. FSFR2100 also has an internal soft-start for
3ms to reduce the current overshoot during the initial
cycles, which adds 40kHz to the initial frequency of the
external soft-start circuit, as shown in Figure 20. The
initial frequency of the soft-start is given as:
It is typical to set the initial frequency of soft-start two ~
three times the resonant frequency (f
network.
The soft-start time is three to four times of the RC time
constant. The RC time constant is as follows:
4. Control Pin
The FSFR2100 has a control pin for protection, cycle
skipping, and remote on/off. Figure 21 shows the internal
block diagram for control pin.
Protection: When the control pin voltage exceeds 5V,
protection
described in the protection section.
Pulse Skipping: FSFR2100 stops switching when the
control pin voltage drops below 0.4V and resumes
switching when the control pin voltage rises above 0.6V.
To use pulse-skipping, the control pin should be
connected to the opto-coupler collector pin. The
frequency that causes pulse skipping is given as:
T
f
SS
ISS
f
=
ISS
Figure 20. Frequency Sweeping of Soft-start
=
R
(
f
SS
s
Figure 21. Internal Block of Control Pin
5.2
R
C
min
k
is
SS
Ω
+
40kHz
triggered.
5.2
R
SS
k
Ω
) 100 40 (
×
Detailed
+
Control loop
kHz
take over
O
applications
) of the resonant
)
time
are
(3)
(4)
10
Remote On / Off: When an auxiliary power supply is
used for standby, the main power stage using FSFR2100
can be shut down by pulling down the control pin voltage,
as shown in Figure 23. R1 and C1 are used to ensure
soft-start when switching resumes.
SKIP
Figure 22. Control Pin Configuration for Pulse
=
Figure 23. Remote On / Off Circuit
5
R
2 .
min
k
+
. 4
R
16
max
Skipping
k
x
100
(
kHz
)
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