F3 PWM controller
ICE3BS03LJG
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1
Pin Configuration with PG-DSO-8
1.2
Pin Functionality
BL (extended Blanking and Latch off enable)
The BL pin combines the functions of extendable
blanking time for entering the Auto Restart Protection
Mode and the external latch off enable. The extendable
blanking time function is to extend the built-in 20ms
blanking time by adding an external capacitor at BL to
ground. The external latch off enable function is an
external access to latch off the IC. It is triggered by
pulling down the BL pin to less than 0.25V.
Pin
Symbol Function
1
BL
extended Blanking and Latch off
enable
2
3
4
5
6
7
8
FB
CS
Feedback
Current Sense
Gate
HV
Gate driver output
High Voltage input
Not Connected
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 is the only control in case of light load at the
Active Burst Mode.
n.c.
VCC
GND
Controller Supply Voltage
Controller Ground
CS (Current Sense)
The Current Sense pin senses the voltage developed
on the series resistor inserted in the source of the
Power MOSFET. If CS reaches the internal threshold
of the Current Limit Comparator, the Driver output is
immediately switched off. Furthermore, this current
information can be used to realize the Current Mode
operation through the PWM-Comparator where it
compares with FB signal.
Package PG-DSO-8
BL
1
8
7
6
5
GND
VCC
N.C.
Gate
FB
2
The Gate pin is the output of the internal driver stage
connected to the Gate of an external power MOSFET.
CS
3
4
HV (High Voltage)
The high voltage Pin is connected to the rectified DC
input voltage. It is the input for the integrated 500V
Startup cell.
Gate
HV
VCC (Power supply)
The VCC pin is the positive supply of the IC. The
operating range is between 10.5V and 26V.
Figure 1
Pin Configuration PG-DSO-8(top view)
GND (Ground)
The GND pin is the ground of the controller.
Version 2.0
5
6 Dec 2007
INFINEON [ Infineon ]
