ICE3DS01L_05 Datasheet, PDF (6/27 Pages) Infineon Technologies AG – Off-Line SMPS Current Mode Controller with integrated 500V Startup Cell

1.3
Pin Functionality
SoftS (Soft Start & Auto Restart Control)
The SoftS pin combines the function of Soft Start in case of
Start Up and Auto Restart Mode and the controlling of the
Auto Restart Mode in case of error detection. Furthermore
the blanking window for high load jumps is adjusted by
means of the external capacitor connected to SoftS.
FB (Feedback)
The information about the regulation is provided by the FB
Pin to the internal Protection Unit and to the internal PWM-
Comparator to control the duty cycle. The FB-Signal
controls in case of light load the Active Burst Mode of the
controller.
CS (Current Sense)
The Current Sense pin senses the voltage developed on the
series resistor inserted in the source of the external
PowerMOS. If CS reaches the internal threshold of the
Current Limit Comparator, the Driver output is immediately
switched off. Furthermore the current information is
provided for the PWM-Comparator to realize the Current
Mode.
Gate
The Gate pin is the output of the internal driver stage
connected to the Gate of an external PowerMOS.
HV (High Voltage)
The HV pin is connected to the rectified DC input voltage. It
is the input for the integrated 500V Startup Cell.
VCC (Power supply)
The VCC pin is the positive supply of the IC. The operating
range is between 8.5V and 21V.
GND (Ground)
The GND pin is the ground of the controller.
F3
ICE3DS01L/LG
Pin Configuration and Functionality
Version 2.1
6
15 Nov 2005