ICE2QR1765G 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
ICE2QR1765G
Pin Configuration and Functionality
1 Pin Configuration and Functionality
1.1 Pin Configuration with PG-DSO-
16/12
1.3
Pin Functionality
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
ZC
1
12
GND
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.
FB
2
N.C.
3
CS
4
11
VCC
10
N.C.
9
N.C.
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_VCCoff and V_VCCOVP.
Drain
5
Drain
6
8
Drain
7
Drain
GND (Ground)
This is the common ground of the controller.
Figure 1
Pin Configuration PG-DSO-16/12 (top
view)
Version 2.0
5
March 11, 2011