FSFR1800USL Fairchild Semiconductor, FSFR1800USL Datasheet - Page 3

• Manufacturer Part Number: FSFR1800USL
• Description: Switching Converters, Regulators & Controllers 260W Powr Switch for Half Brdg Res Cnvtr
• Manufacturer: Fairchild Semiconductor

Specifications of FSFR1800USL

• Input Voltage: 5 V
• Switching Frequency: 300 KHz
• Operating Temperature Range: - 40 C to + 130 C
• Mounting Style: Through Hole
• Duty Cycle (max): 52 %
• Package / Case: SIP-9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2009 Fairchild Semiconductor Corporation
FSFR-US Series • Rev.1.0.2
Pin Configuration
Pin Definitions
Pin #
10
1
2
3
4
5
6
7
8
9
Name
HV
LV
V
V
SG
PG
NC
AR
CS
R
CTR
DL
T
CC
CC
This is the drain of the high-side MOSFET, typically connected to the input DC link voltage.
This pin is for discharging the external soft-start capacitor when any protections are
triggered. When the voltage of this pin drops to 0.2, all protections are reset and the
controller starts to operate again.
This pin programs the switching frequency. Typically, an opto-coupler is connected to control
the switching frequency for the output voltage regulation.
This pin senses the current flowing through the low-side MOSFET. Typically, negative
voltage is applied on this pin.
This pin is the control ground.
This pin is the power ground. This pin is connected to the source of the low-side MOSFET.
This pin is the supply voltage of the control IC.
No connection.
This is the supply voltage of the high-side gate-drive circuit IC.
This is the drain of the low-side MOSFET. Typically, a transformer is connected to this pin.
Figure 3. Package Diagram
3
Description
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