ICE2QR4765G Datasheet, PDF (5/21 Pages) Infineon Technologies AG – Off-Line SMPS Quasi-Resonant PWM Controller with integrated 650V CoolMOS® and startup cell in DSO-16/12

CoolSET^® - Q1
ICE2QR4765G
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration with PG-DSO-16/
12
Pin Symbol Function
1
ZC Zero crossing
2
FB Feedback
3
N.C. Not Connected
4
CS Current Sense
5
Drain _650V¹⁾ _{CoolMOS™ Drain}
6
Drain _650V¹⁾ _{CoolMOS™ Drain}
7
Drain _650V¹⁾ _{CoolMOS™ Drain}
8
Drain _650V¹⁾ _{CoolMOS™ Drain}
9
N.C. Not Connected
10
N.C. Not Connected
11
VCC Controller Supply Voltage
12
GND Controller Ground
1) _{at Tj = 110°C}
1.2
Package PG-DSO-16/12
1.3
Pin Functionality
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_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.
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_cs during on-time of the
main power switch.
ZC
1
12
GND
Drain (Drain of integrated CoolMOS^®)
Drain pin is the connection to the drain of the internal
CoolMOS^®.
FB
2
N.C.
3
CS
4
11
VCC
10
N.C.
9
N.C.
VCC (Power supply)
VCC pin is the positive supply of the IC. The operating range
is between V_VCCoff and V_VCCOVP.
GND (Ground)
This is the common ground of the controller.
Drain
5
Drain
6
8
Drain
7
Drain
Figure 1
Pin Configuration PG-DSO-16/12 (top view)
Version 2.0
5
July 26, 2011