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ICE2PCS05 Datasheet(PDF) 5 Page - Infineon Technologies AG |
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ICE2PCS05 Datasheet(HTML) 5 Page - Infineon Technologies AG |
5 / 22 page Version 1.0 5 09 Oct 2008 CCM-PFC ICE2PCS05/G Pin Configuration and Functionality 1 Pin Configuration and Functionality 1.1 Pin Configuration Figure 1 Pin Configuration (top view) 1.2 Pin Functionality GND (Ground) The ground potential of the IC. 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. 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 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 220 Ω is recommended in order to limit this current into the IC. FREQ (Frequency Setting) This pin allows the setting of the operating switching frequency by connecting a resistor to ground. The frequency range is from 20kHz to 250kHz. 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. VCOMP (Voltage Loop Compensation) This pin provides the compensation of the output voltage loop with a compensation network to ground (see Figure 2). This also gives the soft start function which controls an increasing AC input current during start-up. 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. GATE The GATE pin is the output of the internal driver stage, which has a capability of 1.5A instantaneous source and 2.0A instantaneous sink current. Its gate drive voltage is clamped at 15V (typically). Pin Symbol Function 1 GND IC Ground 2 ICOMP Current Loop Compensation 3 ISENSE Current Sense Input 4 FREQ Switching Frequency Setting 5 VCOMP Voltage Loop Compensation 6 VSENSE VOUT Sense (Feedback) Input 7 VCC IC Supply Voltage 8 GATE Gate Drive Output Package PG-DIP-8 / PG-DSO-8 1 6 7 8 4 3 2 5 GATE GND ICOMP ISENSE VCC VSENSE FREQ VCOMP |
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