ice2qr4765z Infineon Technologies Corporation, ice2qr4765z Datasheet - Page 5

• Manufacturer Part Number: ice2qr4765z
• Description: Off-line Smps Quasi-resonant Pwm Controller With Integrated 650v Coolmos And Startup Cell In Dip- 7
• Manufacturer: Infineon Technologies Corporation

1.1
1)
1.2
Figure 1
1
Version 2.0
Pin
1
2
3
4
5
7
8
at T
j
=110°C
Pin Configuration with PG-DIP-7
Symbol
Pin Configuration and Functionality
Drain
GND
VCC
N.C.
ZC
CS
FB
Package PG-DIP-7
Pin Configuration PG-DIP-7 (top view)
Function
Zero Crossing
Feedback
Current Sense/
650V
Not Connected
650V
Controller Supply Voltage
Controller Ground
1)
1)
CoolMOS
CoolMOS
®
®
Drain
Source
5
1.3
ZC (Zero Crossing)
At this pin, the voltage from the auxiliary winding after a
time delay circuit is applied. Internally, this pin is connected
to the zero-crossing detector for switch-on determination.
Additionally, the output overvoltage detection is realized by
comparing the voltage Vzc with an internal preset threshold.
FB (Feedback)
Normally, an external capacitor is connected to this pin for a
smooth voltage V
PWM signal generator for switch-off determination
(together with the current sensing signal), the digital signal
processing for the frequency reduction with decreasing load
during normal operation, and the Active Burst Mode
controller for entering Active Burst Mode operation
determination and burst ratio control during Active Burst
Mode operation. Additionally, the open-loop / over-load
protection is implemented by monitoring the voltage at this
pin.
CS (Current Sense)
This pin is connected to the external shunt resistor for the
primary current sensing and the internal PWM signal
generator for switch-off determination (together with the
feedback voltage). Moreover, short-winding protection is
realised by monitoring the voltage V
main power switch.
Drain (Drain of integrated CoolMOS
Drain pin is the connection to the drain of the internal
CoolMOS
VCC (Power supply)
VCC pin is the positive supply of the IC. The operating range
is between V
GND (Ground)
This is the common ground of the controller.
®.
Pin Configuration and Functionality
Pin Functionality
VCCoff
FB
and V
. Internally, this pin is connected to the
VCCOVP
.
cs
CoolSET
ICE2QR4765Z
®
during on-time of the
)
May 25, 2011
®
- Q1