參數(shù)資料
型號(hào)： A1242LUA-I2-T
廠商： Allegro Microsystems Inc
文件頁(yè)數(shù)： 10/12頁(yè)
文件大?。?/td> 297K
描述： IC LATCH HALL EFFECT 3-SIP
產(chǎn)品培訓(xùn)模塊： Current Sensor
標(biāo)準(zhǔn)包裝： 500
傳感范圍： 80G 跳閘，-80G 釋放
類型： 單極開(kāi)關(guān)
電源電壓： 3.5 V ~ 24 V
電流 - 電源： 6.9mA
輸出類型： 數(shù)字式，開(kāi)漏極
特點(diǎn)： 穩(wěn)壓電壓
工作溫度： -40°C ~ 150°C
封裝/外殼： 3-SIP
供應(yīng)商設(shè)備封裝： 3-SIP
包裝： 散裝
Two-Wire Chopper-Stabilized Hall Effect Latch
A1242
9
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Power Derating
Power Derating
The device must be operated below the maximum junction
temperature of the device, T
J(max)
. Under certain combinations of
peak conditions, reliable operation may require derating sup-
plied power or improving the heat dissipation properties of the
application. This section presents a procedure for correlating
factors affecting operating T
J
. (Thermal data is also available on
the Allegro MicroSystems Web site.)
The Package Thermal Resistance, R
qJA
, is a figure of merit sum-
marizing the ability of the application and the device to dissipate
heat from the junction (die), through all paths to the ambient air.
Its primary component is the Effective Thermal Conductivity,
K, of the printed circuit board, including adjacent devices and
traces. Radiation from the die through the device case, R
qJC
, is
relatively small component of R
qJA
. Ambient air temperature,
T
A
, and air motion are significant external factors, damped by
overmolding.
The effect of varying power levels (Power Dissipation, P
D
), can
be estimated. The following formulas represent the fundamental
relationships used to estimate T
J
, at P
D
.
  P
D
= V
IN
 
?/DIV>
 I
IN
 
(1)
    DT = P
D
 
?/DIV>
 R
qJA
 
(2)
    T
J
 = T
A
 + 擳
 
(3)
For example, given common conditions such as: T
A
= 25癈,
V
CC
= 12 V, I
CC
= 6 mA, and R
qJA
 = 165 癈/W, then:
 
 P
D
= V
CC
 
?/DIV>
 I
CC
= 12 V
?/DIV>
 6 mA = 72 mW
 
DT = P
D
 
?/DIV>
 R
qJA
 = 72 mW
?/DIV>
 165 癈/W = 12癈
 
 T
J
 = T
A
 + DT = 25癈 + 12癈 = 37癈
A worst-case estimate, P
D(max)
, represents the maximum allow-
able power level (V
CC(max)
, I
CC(max)
), without exceeding T
J(max)
,
at a selected R
qJA
 and T
A
.
Example: Reliability for V
CC
 at T
A
=
 
150癈, package LH, using
minimum-K PCB.
Observe the worst-case ratings for the device, specifically:
R
qJA
=
 
228癈/W, T
J(max)
=
 
165癈, V
CC(max)
=
 
24 V, and
I
CC(max)
=
 
17
 
mA.
Calculate the maximum allowable power level, P
D(max)
. First,
invert equation 3:
  DT
max
 = T
J(max)
  T
A
 = 165
 
癈
 

 
150
 
癈 = 15
 
癈
This provides the allowable increase to T
J
 resulting from internal
power dissipation. Then, invert equation 2:
  P
D(max)
= DT
max
 ?R
qJA
= 15癈 ?228 癈/W = 66 mW
Finally, invert equation 1 with respect to voltage:
  V
CC(est)
 = P
D(max)
? I
CC(max)
 = 66 mW ?17 mA = 3.9 V
The result indicates that, at T
A
, the application and device can
dissipate adequate amounts of heat at voltages dV
CC(est)
.
Compare V
CC(est)
 to V
CC(max)
. If V
CC(est)
 d V
CC(max)
, then reli-
able operation between V
CC(est)
 and V
CC(max)
 requires enhanced
R
qJA
. If V
CC(est)
 e V
CC(max)
, then operation between V
CC(est)
 and
V
CC(max)
 is reliable under these conditions.
相關(guān)PDF資料
PDF描述
A1244LUA-I2-T IC HALL EFFECT LATCH SIP-3
A1302KUA-T IC SENSOR HALL EFFECT 3-SIP
A1323LLHLT-T IC SENSOR HALL EFFECT SOT23W
A1351LKTTN-T IC SENSOR HALL EFFECT 4-SIP
A1354KKT-T IC SENSOR HALL EFFECT 4-SIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A1243 制造商:Hakko 功能描述:Tip,0.8D,929 -2/939,903 Used With Soldering Stations
A1243LLHLX-I1-T 功能描述:IC HALL EFFECT LTCH DGTL SOT23W 制造商:allegro microsystems, llc 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:10,000
A1243LLHLX-I2-T 功能描述:IC HALL EFFECT LTCH DGTL SOT23W 制造商:allegro microsystems, llc 系列:- 包裝:- 零件狀態(tài):有效 功能:- 技術(shù):- 極化:- 感應(yīng)范圍:- 測(cè)試條件:- 電壓 - 電源:- 電流 - 電源（最大值）:- 電流 - 輸出（最大值）:- 輸出類型:- 特性:- 工作溫度:- 封裝/外殼:- 供應(yīng)商器件封裝:- 標(biāo)準(zhǔn)包裝:10,000
A1244 制造商:ALLEGRO 制造商全稱:Allegro MicroSystems 功能描述:Chopper-Stabilized, Two Wire Hall-Effect Latch
A-1244 制造商:TE Connectivity 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*