ICE2QR1765G_14 Datasheet, PDF (24/27 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
Input power curve
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Input power curve
Two input power curves gives typical input power versus ambient temperature are showed below;
Vin=85~265Vac (Figure 13) and Vin=230Vac (Figure 14). The curves are derived based on a typical
discontinuous mode flyback model which considers either 50% duty ratio or 115V maximum secondary to
primary reflected voltage (high priority). The calculation is based on no copper area as heatsink for the device.
The input power already includes power loss at input common mode choke and bridge rectifier and the
CoolMOS^TM. The device saturation current (I_{D_plus}@T_j=125°C) is also considered.
To estimate the out power of the device, it is simply multiplying the input power at a particular ambient
temperature with the estimated efficiency for the application. For example, a wide range input voltage (Figure
13), operating temperature is 50 °C, estimated efficiency is 85%,the output power is 23.8W (28W*0.85).
Figure 13 Input Power curve Vin=85~265Vac; P_in=f(T_a)
Figure 14 Input Power curve Vin=230Vac; P_in=f(T_a)
Data Sheet
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V2.1, 2014-04-01