Absolute current only needs to be set between the desired maximum brightness and the maximum rating of the LED; current matching must be good enough to maintain even display illumination.
最大定格の入力電圧との違いは、最大定格はあくまでの印加可能な電圧であり、動作については問いません。
The difference between those voltages and the maximum rating input voltage is that the maximum rating refers to the voltage that can safely be applied to a given IC, irrespective of the resulting operating behavior of the IC.
In general, heat dissipation design is executed such that, within the constraints of the conditions of use, the required power is obtained while keeping the chip temperature Tj within the maximum rated value.
Protective function: Thermal shutdown"Thermal shutdown" refers to a mechanism whereby the operation of a circuit is shut down when the junction temperature for the IC reaches the maximum rating, or closely below or above the Tj max.
Spellman High Voltage Monoblocks® have output voltage regulation fault monitoring and because of the signal-to-noise ratio in the monitoring circuits, operating below a few percent of the maximum rated output may cause a voltage regulation fault.
In case of forced cooling by a cooling fan, etc., design so that the temperature will fall within the maximum rated temperature of the semiconductor device even if the fan fails and stops, or provide a thermal shutdown circuit.
External Surge and External Noise Design so that the semiconductor device falls within the maximum rating even when it has an external surge voltage or external noise.
Where the current, voltage, temperature and other items fall within the maximum ratings, two items or more are simultaneously applied in most cases of actual device operation.
Most of our unmodified products(with the exception of several X-ray generators) obtain maximum rated power at maximum rated voltage and maximum rated current.
Determine the design based not on the actual performance of semiconductor devices in a single lot used for the device review and evaluation last but on that they fall within the maximum rating.
From this article, we will calculate the heat produced by losses thus determined, and will describe how to determine whether values are within maximum ratings for the conditions of actual use, and explain approaches to dealing with cases where maximum ratings are exceeded and the like.
The pair of 2MΩ resistors on SDA and SCL divides down the battery voltage so that the voltage of SDA and SCL does not exceed the maximum rating of the I2C master.
It is irrational to determine the maximum ratings with reference to the temperature dependency of the thermal resistance or ON resistance, and the hot-spot appearance point since the working range becomes narrow.
Method B is very economical, but less accurate than Method A. As current is not regulated in Method B, absolute current through each LED must be kept between the desired maximum brightness and the maximum rating of the LED.
Load regulation: Change in value of dc output voltage resulting from a change in load from open-circuit to maximum-rated output current, specified as the change in± mV or±%.
入力等価回路電源ICに限らず、ICの各端子には最大定格やバイアス電流などの規格値が存在します。
Input Equivalent Circuit The pins not only for power ICs but for virtually any IC are governed by specification values, such as maximum ratings and bias current levels.
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