FSFR1600XS Fairchild Semiconductor, FSFR1600XS Datasheet - Page 11

• Manufacturer Part Number: FSFR1600XS
• Description: IC FPS PWR SWITCH 160W 9-SIP
• Manufacturer: Fairchild Semiconductor
• Series: FPS™r

Specifications of FSFR1600XS

• Output Isolation: Isolated
• Frequency Range: 94kHz ~ 106kHz
• Voltage - Input: 9.6 V ~ 25 V
• Voltage - Output: 500V
• Power (watts): 160W
• Operating Temperature: -40°C ~ 130°C
• Package / Case: 9-SSIP
• Output Voltage: 500 V
• Output Power: 160 W
• Input Voltage: 9.6 V to 25 V
• Switching Frequency: 100 KHz
• Operating Temperature Range: - 40 C to + 130 C
• Mounting Style: Through Hole
• Duty Cycle (max): 50 %
• Number Of Outputs: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2010 Fairchild Semiconductor Corporation
FSFR-XS Series • Rev.1.0.1
6. Current Sensing Using a Resistor: FSFR-XS series
senses drain current as a negative voltage, as shown in
Figure 23 and Figure 24. Half-wave sensing allows low
power dissipation in the sensing resistor, while full-wave
sensing has less switching noise in the sensing signal.
5.3 Over-Voltage Protection (OVP): When the LV
reaches 23V, OVP is triggered. This protection is used
when auxiliary winding of the transformer to supply V
to the FPS™ is utilized.
5.4 Thermal Shutdown (TSD): The MOSFETs and
the control IC in one package makes it easier for the
control IC to detect the abnormal over-temperature of
the
approximately 130°C, thermal shutdown triggers.
MOSFETs.
V
V
CS
CS
Figure 23. Half-Wave Sensing
Figure 24. Full-Wave Sensing
R
sense
CS
CS
Control
Control
SG
SG
IC
IC
Ids
If
Ids
PG
PG
the
R
Cr
sense
Cr
Np
V
I
V
Np
I
ds
temperature
ds
CS
CS
Ns
Ns
Ns
Ns
exceeds
CC
CC
11
7. PCB Layout Guidelines: Duty imbalance problems
may occur due to the radiated noise from the main
transformer, the inequality of the secondary side leakage
inductances of main transformer, and so on. This is one
of the reasons that the control components in the vicinity
of R
on PCB layout. The direction of the magnetic field on the
components caused by the primary current flow is
changed when the high- and low-side MOSFET turn on
by turns. The magnetic fields with opposite directions
induce a current through, into, or out of the R
makes the turn-on duration of each MOSFET different. It
is strongly recommended to separate the control
components in the vicinity of R
current flow pattern on PCB layout. Figure 25 shows an
example for the duty-balanced case.
T
pin are enclosed by the primary current flow pattern
Figure 25. Example for Duty Balancing
T
pin from the primary
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T
pin, which