ICE2QR4765_10 Datasheet, PDF (5/21 Pages) Infineon Technologies AG – Off-Line SMPS Quasi-Resonant PWM Controller

CoolSET^® - Q1
ICE2QR4765
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration with PG-DIP-8- 1.3
Pin Functionality
6
ZC (Zero Crossing)
Pin Symbol Function
1
ZC Zero Crossing
2
FB Feedback
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.
3
CS
4, 5 Drain
6
n.c.
7
VCC
8
GND
1) _{at Tj=110°C}
Current Sense/
650V¹⁾ Depl. CoolMOS^® Source
650V¹⁾ Depl. CoolMOS^® Drain
Not connected
Controller Supply Voltage
Controller Ground
1.2
Package PG-DIP-8-6
FB (Feedback)
Normally, an external capacitor is connected to this pin
for a smooth voltage V_FB. Internally, this pin is
connected to the 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.
ZC
1
FB
2
CS
3
CS (Current Sense)
This pin is connected to the shunt resistor for the
8
GND
primary current sensing, externally, and the PWM
signal generator for switch-off determination (together
with the feedback voltage), internally. Moreover, short-
winding protection is realised by monitoring the voltage
7
VCC
V_cs during on-time of the main power switch.
Drain (Drain of integrated Depl. CoolMOS^®)
Drain pin is the connection to the drain of the internal
6
n.c.
Depl. CoolMOS^®.
Drain
4
VCC (Power supply)
5
Drain ^{VCC pin is the positive supply of the IC. The operating}
range is between V_VCCoff and V_VCCOVP.
Figure 1 Pin Configuration PG-DIP-8-6 (top view)
Note: Pin 4 and 5 are shorted
GND (Ground)
This is the common ground of the controller.
Version 2.1
5
February 5, 2010