Harman Kardon MAS 110, Service Manual

Page: 25 / 57

www.fairchildsemi.com
FAN7602 Rev. 1.0.
1
FAN7602 Green Current Mode PWM Controller
Pin Assignments
Figure 3. Pin Configuration (Top View)
Pin Definitions
Pin Number Pin Name Pin Function Description
1 LUVP 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.
2 Latch/Plimit Latch Protection and Power Limit Pin. When the pin voltage exceeds 4V, the latch
protection works and the latch protection is reset when the Vcc voltage is lower than
5V. For the power limit function, the OCP level decreases as the pin voltage
increases.
3 CS/FB 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 external RC filter.
4 GND 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.
5 OUT 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.
6 Vcc Supply Voltage Pin. IC operating current and MOSFET driving current are supplied
using this pin.
7 NC No Connection.
8 Vstr Start-up Pin. This pin is used to supply IC operating current during IC start-up. After
start-up, the internal JFET is turned off to reduce power loss.
F A N 7 6 0 2
1 2
6 5 8 7
Y W W
3 4
Latch/
Plimit
GND CS/FB LUVP
Vstr NC Vcc Out
harman/kardon MAS 100 / MAS 110 / MAS 1 Service Manual
Page 25 of 57