高性價(jià)比的石英晶體諧振器超級(jí)適合用于兒童手表ABM10-20.000MHZ-E20-T，電感器的直流電阻受環(huán)境溫度和電感體固有自熱的影響。圖2為AMXLA-Q1040系列的DCR隨環(huán)境溫度升高而升高的變化情況。從圖中可以看出，石英晶振和大電感值的DCR比小電感值受溫度的影響更大。然而，作為DCR的百分比變化，從25°C到最大180°C的溫度變化將導(dǎo)致DCR約60%的線性增加，而不管電感值如何。

高性價(jià)比的石英晶體諧振器超級(jí)適合用于兒童手表ABM10-20.000MHZ-E20-T，例如，68uH電感在25°C時(shí)的DCR≈210mΩ。增加60%的直流電阻，在180°C下計(jì)算大約為336mΩ。作為比較，47uH電感在25°C時(shí)的DCR≈145mΩ，而在高溫時(shí)的DCR≈232mΩ。

DCR的增加通過增加直流損耗對電感的性能產(chǎn)生負(fù)面影響。隨著額外的損耗，產(chǎn)生更多的自熱，這是在擴(kuò)展溫度應(yīng)用中降額電感的主要原因。因而貼片晶振也為廣泛應(yīng)用程序帶來極大的便利。

Manufacturer Part Number 原廠編碼	Manufacturer廠家	Series型號(hào)	Type 系列	Frequency頻率	Package / Case包裝/封裝
ABM3C-24.576MHZ-D4Y-T	Abracon晶振	ABM3C	MHz Crystal	24.576MHz	4-SMD, No Lead
ABM3C-14.31818MHZ-D4Y-T	Abracon晶振	ABM3C	MHz Crystal	14.31818MHz	4-SMD, No Lead
ABS06L-32.768KHZ-T	Abracon晶振	ABS06L	kHz Crystal (Tuning Fork)	32.768kHz	2-SMD, No Lead
ABMM-11.0592MHZ-B2-T	Abracon晶振	ABMM	MHz Crystal	11.0592MHz	4-SMD, No Lead
ABM8G-14.31818MHZ-B4Y-T	Abracon晶振	ABM8G	MHz Crystal	14.31818MHz	4-SMD, No Lead
ABM8G-13.000MHZ-B4Y-T	Abracon晶振	ABM8G	MHz Crystal	13MHz	4-SMD, No Lead
ABM8G-30.000MHZ-B4Y-T	Abracon晶振	ABM8G	MHz Crystal	30MHz	4-SMD, No Lead
ABM8G-33.000MHZ-B4Y-T	Abracon晶振	ABM8G	MHz Crystal	33MHz	4-SMD, No Lead
ABM8G-20.000MHZ-B4Y-T	Abracon晶振	ABM8G	MHz Crystal	20MHz	4-SMD, No Lead
ABS07-LR-32.768KHZ-6-T	Abracon晶振	ABS07-LR	kHz Crystal (Tuning Fork)	32.768kHz	2-SMD, No Lead
ABM10-27.000MHZ-E20-T	Abracon晶振	ABM10	MHz Crystal	27MHz	4-SMD, No Lead
ABM10-20.000MHZ-E20-T	Abracon晶振	ABM10	3225貼片晶振	20MHz	4-SMD, No Lead
ABLS-LR-4.9152MHZ-T	Abracon晶振	ABLS-LR	MHz Crystal	4.9152MHz	HC49/US
ABM10-25.000MHZ-E20-T	Abracon晶振	ABM10	MHz Crystal	25MHz	4-SMD, No Lead

The inductor’s DC resistance is affected by the ambient temperature and inherent self-heating of the inductor body. Fig.2 below illustrates the change in DCR of the AMXLA-Q1040 series as body/case temperature increases as ambient temperature increases. The graph shows that the DCR of larger inductance values are influenced more by temperature than smaller inductance values. However, as a percentage change in DCR, the temperature change from 25°C to the maximum 180°C will cause approximately a 60% linear increase in DCR regardless of the inductance value.

For example, the 68uH inductor has a DCR ≈ 210m? at 25°C. Adding 60% more DC resistance calculates to approximately 336m? at 180°C. For comparison, the 47uH inductor has a DCR ≈ 145m? at 25°C and a high temp DCR ≈ 232m?.
The increase in DCR negatively affects the inductor’s performance by increasing DC loss. With the additional loss, more self-heating is generated and is the primary reason for derating inductors in extended temperature applications.

上一頁 余下全文

1/5

下一頁