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PDF ICE1PCS02G Data sheet ( Hoja de datos )
| Número de pieza | ICE1PCS02G | |
| Descripción | Standalone Power Factor Correction (PFC) Controller | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Datasheet, V1.2, 06 Feb 2007
CCM-PFC
ICE1PCS02
ICE1PCS02G
Standalone Power Factor
Correction (PFC) Controller in
Continuous Conduction Mode
(CCM) with Input Brown-Out
Protection
Power Management & Supply
Never stop thinking.
Free Datasheet http://www.datasheet4u.com/
1 page  
CCM-PFC
ICE1PCS02/G
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration
Pin Symbol Function
1 GND IC Ground
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.
2 ICOMP Current Loop Compensation
3 ISENSE Current Sense Input
4 VINS Brown-out Sense Input
5 VCOMP Voltage Loop Compensation
6 VSENSE VOUT Sense (Feedback) Input
7 VCC IC Supply Voltage
8 GATE Gate Drive Output
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.
During power up time, high inrush currents cause high
voltage drop at R1, driving currents into pin 3 which
could be beyond the absolute maximum ratings.
Therefore a series resistor (R2) of around 220Ω is
recommended in order to limit this current into the IC.
Package PG-DIP-8 / PG-DSO-8
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<0.8V, shuts down the
IC. The IC turns on at VINS>1.5V.
GND
1
ICOMP
2
ISENSE
3
VINS
4
8 GATE
7 VCC
6 VSENSE
5 VCOMP
Figure 1 Pin Configuration (top view)
VSENSE (Voltage Sense/Feedback)
The output bus voltage is sensed at this pin via a
resistive divider. The reference voltage for this pin is
5V.
VCOMP (Voltage Loop Compensation)
This pin provides the compensation of the output
voltage loop with a compensation network to ground
(see Figure 2).
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 10V and 21V. The turn-on
threshold is at 11.2V and under voltage occurs at
10.2V. There is no internal clamp for a limitation of the
power supply.
1.2 Pin Functionality
GND (Ground)
The ground potential of the IC.
GATE
The GATE pin is the output of the internal driver stage,
which has a capability of 1.5A source and sink current.
Its gate drive voltage is internally clamped at 11.5V
(typically).
Version 1.2
5 06 Feb 2007
5 Page 
CCM-PFC
ICE1PCS02/G
Functional Description
From
Full-wave
Retifier
L1
R7
D1 R3 Vout
C2
R4
Current Loop
+
PWM Generation
VIN
Av(IIN)
Nonlinear
Gain
t
Gate Driver
GATE
OTA1
5V
VSENSE
ICE1PCS02/G
VCOMP
PWM Logic
HIGH to
turn on
Gate Driver
VCC
LV
Z1
External
MOS
GATE
* LV: Level Shift
ICE1PCS02/G
Figure 14 Gate Driver
The output is active HIGH and at VCC voltages below
the under voltage lockout threshold VCCUVLO, the gate
drive is internally pull low to maintain the off state.
R6
C4 C5
Figure 13 Voltage Loop
3.8.2 Enhanced Dynamic Response
Due to the low frequency bandwidth of the voltage loop,
the dynamic response is slow and in the range of about
several 10ms. This may cause additional stress to the
bus capacitor and the switching transistor of the PFC in
the event of heavy load changes.
The IC provides therefore a “window detector” for the
feedback voltage VVSENSE at pin 6 (VSENSE).
Whenever VVSENSE exceeds the reference value (5V)
by +5%, it will act on the nonlinear gain block which in
turn affect the gate drive duty cycle directly. This
change in duty cycle is bypassing the slow changing
VCOMP voltage, thus results in a fast dynamic
response of VOUT.
3.9 Output Gate Driver
The output gate driver is a fast totem pole gate drive. It
has an in-built cross conduction currents protection and
a Zener diode Z1 (see Figure 14) to protect the external
transistor switch against undesirable over voltages.
The maximum voltage at pin 8 (GATE) is typically
clamped at 11.5V.
Version 1.2
11 06 Feb 2007
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ICE1PCS02G.PDF ] | |
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