ICE2QR2280Z Datasheet, PDF (18/21 Pages) Infineon Technologies AG – Off-Line SMPS Quasi-Resonant PWM Controller with integrated 800V CoolMOS® and startup cell in DIP-7

CoolSET^® - Q1
ICE2QR2280Z
Input Power Curve
6 Input Power Curve
Two input power curves gives typical input power versus ambient temperature are showed below;
Vin=85~265Vac(Figure 11) and Vin=230Vac(Figure 12). The curves are derived based on a typical
discontinuous mode flyback model which considers 150V maximum secondary to primary reflected voltage. The
calculation is based on 232mm²,2 ounce copper area as heatsink for the device. The input power already includes
power loss at input comman mode choke and bridge rectifier and the CoolMOS^®. 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 particulary ambient
temperature with the estimated efficiency for the application. For example, a wide range input voltage(Figure 11),
operating temperature is 50 °C, estimated efficiency is 80%,the output power is 24.8W(31W*0.80)
Input Power curve of ICE2QR2280Z
70
60
50
40
30
20
10
0
0
25
35 45
55 65
75 85
95 105 115 125
Ambient Temperature[⁰C]
Figure 11 Input Power curve Vin=85~265Vac;Pin=f(T_a)
Input Power curve of ICE2QR2280Z
40
35
30
25
20
15
10
5
0
0
25
35 45
55 65
75 85
95 105 115 125
Ambient Temperature[⁰C]
Figure 12 Input Power curve Vin=230Vac;Pin=f(T_a)
Version 2.1
18
August 30, 2011