FAN7602B Fairchild Semiconductor, FAN7602B Datasheet - Page 3

• Manufacturer Part Number: FAN7602B
• Description: The FAN7602B is a green current-mode PWM controller
• Manufacturer: Fairchild Semiconductor

FAN7602B Rev. 1.0.0
© 2007 Fairchild Semiconductor Corporation
Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Latch/Plimit
Name
CS/FB
LUVP
GND
V
OUT
V
NC
STR
CC
Line Under-Voltage Protection Pin. This pin is used to protect the set when the
input voltage is lower than the rated input voltage range.
Gate Drive Output Pin. This pin is an output pin to drive an external MOSFET. The
peak sourcing current is 450mA and the peak sinking current is 600mA. For proper
operation, the stray inductance in the gate driving path must be minimized.
Supply Voltage Pin. IC operating current and MOSFET driving current are supplied
using this pin.
Latch Protection and Power Limit Pin. When the pin voltage exceeds 4V, the latch
protection works; the latch protection is reset when the V
For the power limit function, the OCP level decreases as the pin voltage increases.
Current Sense and Feedback Pin. This pin is used to sense the MOSFET current
for the current mode PWM and OCP. The output voltage feedback information and
the current sense information are added using an external RC filter.
Ground Pin. This pin is used for the ground potential of all the pins. For proper oper-
ation, the signal ground and the power ground should be separated.
No Connection.
start-up, the internal JFET is turned off to reduce power loss.
Start-up Pin. This pin is used to supply IC operating current during IC start-up. After
Figure 3. Pin Configuration (Top View)
LUVP
V
STR
8
1
F A N 7 6 0 2 B
Latch/
Plimit
NC
7
2
3
CS/FB
Y W W
V
6
3
CC
Description
GND
Out
5
4
CC
voltage is lower than 5V.
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