欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號: MC34059FTA
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: HEX EIA-485 TRANSCEIVER with THREE-STATE OUTPUTS
中文描述: LINE TRANSCEIVER, PQFP48
封裝: PLASTIC, TQFP-48
文件頁數(shù): 9/12頁
文件大小: 237K
代理商: MC34059FTA
MC34058 MC34059
9
MOTOROLA ANALOG IC DEVICE DATA
θ
ja = j, j = 40, 60, .. 100
°
C/W.
Example 1. Balanced and Unbalanced Operation
IOL = 50 mA and IOH =
±
50 mA for each driver. VCC = 5.0 V.
How many drivers can be used (Typical power supply current ICCQ = 18 mA.)
Solution:
ICCQ = 0.018 A
The quiescent power is given by:
Balanced Operation:
To determine the amount of power dissipated by each
output stage we need to know the differential output voltage
for the output current required. Figure 7 shows that for IOH
and IOL differential of 50 mA, VODH and VODL are:
Unbalanced Operation:
To determine the amount of power dissipated by each
output stage we need to know the single–ended output
voltage for the output current required. Figures 5 and 6
shows that for an IOH and IOL of
±
50 mA,
VOH
(For this example, balanced operation is assumed.)
Summing the quiescent and driver power for 6 transceivers operating in a package produces;
PDTotal = PQ + 6
PDrvB, and equal to PDTotal = 0.69 W.
produces a set curves that can be used to determine a Safe Operating Area for the specific application. PDTotal is graphed with
PDmax to provide a reference.
PDmax ja, TA
TJmax–TA
ja
For the MC34058/9, the thermal resistance is capable of a wide range. The ability of the package to dissipate power depends
on board type and temperature, layout and ambient temperature (see Appendix A). For the purposes of this example the
thermal resistance can range from 40
°
C/W to 100
°
C/W;
Varying the ambient operating temperature TA = 25, 30, .. 85
°
C; specifying a maximum junction temperature to avoid
thermal shutdown TJmax = 130
°
C; and using the first order approximation for maximum power dissipation;
VOD
|3.0|, and IOL
|IOH|
IOut
0.050 A.
And the power dissipated by each driver is given by;
PDrvB
PDrvB
IOut·
0.10 W.
VCC– VOD
and equal to
3.9 V
VOL
0.895 V
And the power dissipated by each driver is calcu-
lated by;
PDrvU
and equal to
VCC– VOH
· |IOH|
VOL· IOL
PDrvU
0.10 W.
20
3.0
W
TA (
°
C)
30
40
60
80
90
2.5
1.5
0.5
0
1.0
2.0
* Safe Operating Area (SOA), is an operating power, PDTotal, less than PDmax.
So all the drivers in the package can be used if the thermal resistance and/or the ambient temperature is low enough.
Graph of Maximum Power Dissipation Possible
for a Particular
θ
ja and Ambient Temperature
70
50
PDTotal
PDmax (
θ
ja40
PQ
ICCQ· VCC, and is equal to PQ
0.09 W.
*SOA
PDmax (
θ
ja60
PDmax (
θ
j80
PDmax (
θ
ja100
相關(guān)PDF資料
PDF描述
MC3405P Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC3405P Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC34065P-L HIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLERS
MC34065DW-L HIGH PERFORMANCE DUAL CHANNEL CURRENT MODE CONTROLLERS
MC34065 Ultra-Small Supply Voltage Supervisors 5-SC70 -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC3405P 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:DUAL OPERATIONAL AMPLIFIER / DUAL VOLTAGE COMPARATOR
MC3406 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:N-Channel 30-V (D-S) MOSFET High performance trench technology
MC34060 制造商:未知廠家 制造商全稱:未知廠家 功能描述:精密開關(guān)模式脈寬調(diào)制控制電路
MC34060A 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PRECISION SWITCHMODE PULSE WIDTH MODULATOR CONTROL CIRCUIT
MC34060A_06 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Fixed Frequency, PWM, Voltage Mode Single Ended Controllers
主站蜘蛛池模板: 房山区| 黎城县| 朔州市| 耒阳市| 惠安县| 浦东新区| 金阳县| 湟源县| 柞水县| 洪湖市| 新绛县| 铁岭县| 皮山县| 会昌县| 太谷县| 桐柏县| 石河子市| 自贡市| 广灵县| 馆陶县| 余姚市| 永靖县| 临安市| 德格县| 佛学| 获嘉县| 宝兴县| 麻阳| 临安市| 三河市| 长宁县| 华阴市| 衡水市| 宜良县| 洪雅县| 乐陵市| 涟源市| 大洼县| 阿克陶县| 宁陵县| 偏关县|