CCM-PFC
ICE2PCS06/G
Pin Configuration and Functionality
1
Pin Configuration and Functionality
1.1
Pin Configuration
ICOMP (Current Loop Compensation)
Low pass filter and compensation of the current control
loop. The capacitor which is connected at this pin
integrates the output current of OTA2 and averages the
current sense signal.
Pin
Symbol Function
1
2
3
4
5
6
7
8
GND
IC Ground
ICOMP Current Loop Compensation
ISENSE Current Sense Input
ISENSE (Current Sense Input)
The ISENSE Pin senses the voltage drop at the
external sense resistor (R1). This is the input signal for
the average current regulation in the current loop. It is
also fed to the peak current limitation block.
VINS
Brown-out Sense Input
VCOMP Voltage Loop Compensation
VSENSE VOUT Sense (Feedback) Input
During power up time, high inrush currents cause high
negative voltage drop at R1, driving currents out of pin
3 which could be beyond the absolute maximum
ratings. Therefore a series resistor (R2) of around
220W is recommended in order to limit this current into
the IC.
VCC
IC Supply Voltage
Gate Drive Output
GATE
VINS (Brown-out Sense Input)
This VINS pin senses a filtered input voltage divider
and detects for the input voltage Brown-out condition.
A Brown-out condition of VINS<0.71V, shuts down the
IC. The IC turns on at VINS>1.5V.
Package PG-DIP-8 / PG-DSO-8
GND
ICOMP
ISENSE
VINS
1
8
7
6
5
GATE
VCC
VSENSE (Voltage Sense/Feedback)
The output bus voltage is sensed at this pin via a
resistive divider. The reference voltage for this pin is
3V.
2
VCOMP (Voltage Loop Compensation)
3
4
VSENSE
This pin provides the compensation of the output
voltage loop with a compensation network to ground
(see Figure 2).
VCOMP
VCC (Power Supply)
The VCC pin is the positive supply of the IC and should
be connected to an external auxiliary supply. The
operating range is between 11V and 26V. The turn-on
threshold is at 11.8V and under voltage occurs at 11V.
There is no internal clamp for a limitation of the power
supply.
Figure 1
Pin Configuration (top view)
GATE
1.2
Pin Functionality
The GATE pin is the output of the internal driver stage.
Its gate drive voltage is internally clamped at 15.0V
(typically).
GND (Ground)
The ground potential of the IC.
Version 1.1
5
Mar 2010
INFINEON [ Infineon ]
