ICE3BR2280JZ Datasheet, PDF (6/34 Pages) Infineon Technologies AG – Off-Line SMPS Current Mode Controller with integrated 800V

CoolSET^®-F3R80
ICE3BR2280JZ
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration with PG-DIP-7
1.2 Pin Functionality
Pin Symbol Function
1
BBA Brownout, extended Blanking
time & Auto-restart enable
2
FBB Feedback & Burst entry/exit con-
trol
3
CS Current Sense/
800V CoolMOS^® Source
4
n.c. not connected
5
Drain _{800V CoolMOS}^® _Drain
6
-
(no pin)
7
VCC Controller Supply Voltage
8
GND Controller Ground
Package PG-DIP-7
BBA (Brownout, extended Blanking time & Auto-
restart enable)
The BBA pin combines the functions of brownout,
extendable blanking time for over load protection and
the external auto-restart enable. The brownout feature
is to stop the switching pulse when the input voltage is
dropped to a preset low level. The extendable blanking
time function is to extend the built-in 20 ms blanking
time for over load protection by adding an external
capacitor to ground. The external auto-restart enable
function is an external access to stop the gate
switching and force the IC to enter auto-restart mode.
It is triggered by pulling the pin voltage to less than
0.4V.
FBB (Feedback & Burst entry control)
The FBB pin combines the feedback function and the
burst entry/exit control. The regulation information is
provided by the FBB pin to the internal Protection Unit
and the internal PWM-Comparator to control the duty
cycle. The FBB-signal is the only control signal in case
of light load at the Active Burst Mode. The burst entry/
exit control provides an access to select the entry/exit
burst mode level.
BBA
FBB
CS
n.c.
Figure 1
1
8
GND
2
7
VCC
3
4
5
Drain
Pin Configuration PG-DIP-7 (top view)
CS (Current Sense)
The Current Sense pin senses the voltage developed
on the shunt resistor inserted in the source of the
integrated CoolMOS^®. 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.
Drain (Drain of integrated CoolMOS^®)
Pin Drain is the connection to the Drain of the
integrated CoolMOS^®.
VCC (Power Supply)
The VCC pin is the positive supply of the IC. The
operating range is between 10.5V and 25V.
GND (Ground)
The GND pin is the ground of the controller.
Version 2.1a
6
11 Jan 2012