FAN6982 Fairchild Semiconductor, FAN6982 Datasheet - Page 4

• Manufacturer Part Number: FAN6982
• Description: The FAN6982 is a 14-pin, Continuous Conduction Mode (CCM) PFC controller IC intended for Power Factor Correction (PFC) pre-regulators
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN6982 • Rev. 1.0.3
Pin Configuration
Pin Definitions
Pin #
10
11
12
13
14
1
2
3
4
5
6
7
8
9
ISENSE
FBPFC
Name
VRMS
RT/CT
SGND
PGND
OPFC
VREF
RDY
VDD
VEA
IEA
IAC
EN
Description
Output of Current Amplifier. This is the output of the PFC current amplifier. The signal from
this pin is compared with sawtooth and determines the pulsewidth for PFC gate drive.
Input AC Current. For normal operation, this input is used to provide current reference for the
multiplier. The suggested maximum I
Current Sense. The non-inverting input of the PFC current amplifier and the output of
multiplier and PFC I
Line-Voltage Detection. The pin is used for PFC multiplier.
Ready Signal. This pin controls the power-on sequence. Once the FAN6982 is turned on and
the FBPFC voltage exceeds in 2.4V, the RDY pin pulls LOW impedance. If the FBPFC voltage
is lower than 1.15V, the RDY pin pulls HIGH impedance.
Enable Range Function. The range function is enabled when EN is connected to V
The range function is disabled when EN is connected to GND.
Oscillator RC Timing Connection. Oscillator timing node; timing set by RT and CT.
Signal Ground.
Power Ground.
Gate Drive. The totem-pole output drive for PFC MOSFET. This pin is internally clamped
under 15V to protect the MOSFET.
Power Supply. The threshold voltages for startup and turn-off are 11V and 9.3V, respectively.
The operating current is lower than 10mA.
Reference Voltage. Buffered output for the internal 7.5V reference.
Voltage Feedback Input. The feedback input for PFC voltage loop. The inverting input of PFC
error amplifier. This pin is connected to the PFC output through a divider network.
Output of Voltage Amplifier. The error-amplifier output for PFC voltage feedback loop.
A compensation network is connected between this pin and ground.
LIMIT
Figure 4. Pin Configuration
comparator.
4
AC
is 100µA.
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REF
.