FAN7631 Fairchild Semiconductor, FAN7631 Datasheet - Page 3

• Manufacturer Part Number: FAN7631
• Description: The FAN7631 is a pulse-frequency modulation controller for high-efficiency half-bridge resonant converters that includes a high-side gate drive circuit, an accurate current-controlled oscillator, and various protection functions
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN7631 • 1.0.2
Pin Configuration
Pin Definitions
Pin #
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Name
HV
CON
LV
CTR
NC
SG
PG
NC
HO
RT
SS
DT
CS
LO
LS
FI
CC
CC
This pin is the ground of the control part.
This pin is the power ground. This pin typically connects to the source of the low-side MOSFET.
This pin is used to enable / disable the gate drive outputs for pulse-skipping operation. When the
voltage of this pin is above 0.6V, the gate drive outputs are enabled. When the voltage of this pin
drops below 0.4V, gate drive signals for both MOSFETs are disabled.
This pin programs the switching frequency. Typically, an opto-coupler is connected to this pin to
control the switching frequency for the output voltage regulation.
This pin is used to program the soft-start time and overload protection delay. It also programs the
restart delay when the converter auto recovers from the protection states. Typically, a small
capacitor is connected on this pin.
This pin is to adjust the dead time using an external resistor.
No connection
User protection function / fault input. This pin can be used as a latch protection, which is
operated when a voltage applied to this pin is higher than 4V
This pin senses the line voltage for line under-voltage lockout (LUVLO).
This pin senses the current flowing through the main MOSFET. Typically, negative voltage is
applied on this pin.
This pin is used for the low-side gate-driving signal.
This pin is for the supply voltage of the control IC and low-side gate-driving circuit.
No connection
This pin is connected to the drain of the low-side MOSFET. Typically, a transformer is connected
to this pin.
This pin is used for the high-side gate-driving signal.
This pin is used for the supply voltage of the high-side gate-driving circuit.
Figure 3.
Package Pin Assignments (16SOP)
3
Description
DC
.
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