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ICE5AR4770BZSのPtot vs Taグラフについて教えていただけないでしょうか。
ICE5AR4770BZSのデータシート↓
データシートのP.26 Figure 20にてPtot vs Taグラフがあります。
このグラフについて以下の2点教えていただけないでしょうか。
①Ptot=f(Ta)とは周囲温度(Ta)でのPtotという理解であっておりますでしょうか。
f(Ta)という表現のため念のため確認したく。
②このPtotの算出方法についてご教示いただけないでしょうか。
通常Ptot= ΔTj / Rthja となると思います。
このICの場合Tj定格は150℃ですがOTPのmin値が129℃のため129℃基準でΔTjを算出し、RthjaからPtotを算出になるかと思います。
例) Tj=25℃の場合
ΔTj=129 - 25 = 104℃
データシートよりRthja=106℃
Ptot = 104 / 106 = 0.98 [W]
しかしながらPtot vs Taグラフでは約0.95℃となっております。
同様に全温度でわずかに上記計算値より低いPtot値となっておりました。
計算方法が異なりますでしょうか。
もしくはデバイス自体の発熱も含んでいるためPtotが上記計算より低い値となっておりますでしょうか。
以上です、よろしくお願いいたします。
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Hello,
Did Infeneon have software state machine (Block diagram) of Infineon Eva board "EVAL_3K3W_TP_PFC_SIC"?
i tried to find in application note but it doesn't have.
Thank you.
Sorakrai
Show LessDear Experts
Can you please share the step for for IAUT300N08S5N014 ?
Regards
I have read this answer. There was a asked for an exact reason.
The reason is: I need the source code to help me, because I want to design a similar device based on this, whose input voltage is half of the current 100-200V and the output is adjustable between 0-32V or at least 24-30V. A ready-made source code example would greatly speed up the development of the device.
Show LessEvaluation board REF_62W_FLY_1700V_SIC of 1700 V CoolSiC MOSFET doesn't have gerber files in PCB Design Data. Can you please provide the gerber files of the board?
Show LessHi,
is there a list of UART commands for the EVAL_1K4W_ZVS_FB_SMD device available so that the control could be done directly from the microcontroller?
If not, is there source code available for this evaluation board?
Show LessI have recieved a new production lot for IRF7437PBF mosfet which is different from the previous lot.
1. New mosfet don't have cut as compared from the previous lot.
2. Marking Font is different.
Image attached for better understanding. I have not received any change notification from infineon for the same.
Please reply ASAP, production is on hold.
Show LessI have a bit of a problem that in hoping someone can shed some light on.
I have a 4 wire fan (from a power mac g5) and I found that the pinout is positive, negative, PWM and rpm output. It's a bit strange in that the 12v must be connected constantly and the fan speed is actually controlled with either a variable voltage to the PWM pin or I'm guessing an actual PWM of 12v would be more likely. I have tested this with 12, 5 and 3v to the PWM input and it works.
So what I am trying to do is control 4 of these fans with an arduino uno.
If I take a 12v wall wart and power the 12v rail on the fan, then use a mosfet to produce the 12v PWM signal using the arduino to drive the PWM input on the fan, is this the way to go? Can anyone show me an example of how to do this using 1 12v PSU?
My knowledge of transistors/mosfets is nil!
Thanks,
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