FSFR1700HSL FAIRCHILD [Fairchild Semiconductor], FSFR1700HSL Datasheet - Page 3

• Manufacturer Part Number: FSFR1700HSL
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

© 2011 Fairchild Semiconductor Corporation
FSFR1800 / FSFR1700-HS • Rev.1.0.0
Pin Configuration
Pin Definitions
Pin #
10
1
2
3
4
5
6
7
8
9
Name
HV
LV
CTR
SG
PG
NC
RT
CS
DL
LS
CC
CC
This is the drain of the high-side MOSFET, typically connected to the input DC link voltage.
This is the line-sensing pin for the input voltage Under-Voltage Lockout (UVLO).
This pin is used for controlling the switching frequency in normal operation. When any
protections are triggered, the internal Auto/Restart (A/R) circuit starts to sense the voltage on
the pin, which is discharged naturally by external resistance. The IC can be operated with
A/R when the voltage decreases 0.1V. Typically, an opto-coupler is connected to control the
switching frequency for the output voltage regulation and resistors for setting minimum /
maximum operating frequency.
This pin senses the current flowing through the low-side MOSFET. Typically, negative
voltage is applied to this pin.
This pin is the ground of the control part.
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.
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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