ice3ar4780jz Infineon Technologies Corporation, ice3ar4780jz Datasheet - Page 29

• Manufacturer Part Number: ice3ar4780jz
• Description: Off-line Smps Current Mode Controller With Integrated 800v Coolmos And Startup Cell Brownout & Frequency Jitter In Dip- 7
• Manufacturer: Infineon Technologies Corporation

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Two input power curves giving the typical input power versus ambient temperature are showed below; Vin=85Vac~265Vac
(Figure 37) and Vin=230Vac+/-15% (Figure 38). The curves are derived based on a typical discontinuous mode flyback
model which considers either 60% maximum duty ratio or 150V maximum secondary to primary reflected voltage (higher
priority). The calculation is based on no copper area as heatsink for the device. The input power already includes the power
loss at input common mode choke, bridge rectifier and the CoolMOS.The device saturation current (I
also considered.
To estimate the output power of the device, it is simply multiplying the input power at a particular operating ambient
temperature with the estimated efficiency for the application. For example, a wide range input voltage (Figure 37), operating
temperature is 50°C, estimated efficiency is 85%, then the estimated output power is 17W (20W * 85%).
Figure 37
Figure 38
Version 2.0
Input Power Curve
Input power curve Vin=85~265Vac; P
Input power curve Vin=230Vac+/-15%; P
in
=f(T
in
=f(T
a
29
)
a
)
CoolSET
Input Power Curve
ICE3AR4780JZ
D_Puls
@ T
26 Aug 2010
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-F3R80
=125°C) is