A3425LK-T

更新时间： 2024-01-10 00:41:13

品牌	Logo	应用领域
急速微 - ALLEGRO		模拟IC 开关信号电路信息通信管理
页数	文件大小	规格书
21页	574K
描述
Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch

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A3425LK-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOIC-8	针数：	8
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.8	模拟集成电路 - 其他类型：	ANALOG CIRCUIT
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e3
长度：	4.9 mm	功能数量：	1
端子数量：	8	最高工作温度：	150 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压 (Vsup)：	18 V	最小供电电压 (Vsup)：	3.3 V
标称供电电压 (Vsup)：	12 V	表面贴装：	YES
技术：	BICMOS	温度等级：	AUTOMOTIVE
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3.9 mm
Base Number Matches：	1

A3425LK-T 数据手册

A3425

Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch

Typical Thermal Performance

The device must be operated below the maximum junction

Example: Reliability for V_CCat T_A=150°C, package L, using

minimum-K PCB

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.)

Observe the worst-case ratings for the device, speciﬁcally:

_θJA=140°C/W, T_J(max)=165°C, V_CC(max)=18V, and

I_CC(max)= 6mA.

Calculate the maximum allowable power level, P_D(max). First,

invert equation 3:

The Package Thermal Resistance, R_θJA, 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_θJC, is

relatively small component of R_θJA. Ambient air temperature,

T_A, and air motion are signiﬁcant external factors, damped by

overmolding.

∆T_max= T_J(max)– T_A= 165°C–150°C = 15°C

This provides the allowable increase to T_Jresulting from internal

power dissipation. Then, invert equation 2:

P_D(max)= ∆T_max÷R_θJA=15°C÷140 °C/W=107mW

Finally, invert equation 1 with respect to voltage:

_CC(est)= P_D(max)÷ I_CC(max)= 107mW÷6mA=18 V

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.

The result indicates that, at T_A, the application and device can

dissipate adequate amounts of heat at voltages ≤V_CC(est)

Compare V_CC(est)to V_CC(max). If V_CC(est)≤ V_CC(max), then reli-

able operation between V_CC(est)and V_CC(max)requires enhanced

P_D= V_IN

(1)

(2)

(3)

_θJA. If V_CC(est)≥ V_CC(max), then operation between V_CC(est)and

∆T = P_D

θJA

V_CC(max)is reliable under these conditions.

T_J= T_A+ ∆T

For example, given common conditions such as: T_A= 25°C,

V_CC= 12 V, I_CC= 4 mA, and R_θJA= 140 °C/W, then:

P_D= V_CC

= 12 V 4 mA = 48 mW

∆T = P_D

= 48 mW 140 °C/W = 7°C

θJA

T_J= T_A+ ∆T = 25°C + 7°C = 32°C

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_θJAand T_A.

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

A3425DS-Rev. !

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

1...7 8 91011 12 13...21

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A3425LK-TL	ALLEGRO	暂无描述	获取价格
A3425LKTN	ALLEGRO	Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch	获取价格
A3425LKTN-T	ALLEGRO	Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch	获取价格
A3425LK-TS	ALLEGRO	Analog Circuit, 2 Func, BIPolar, PSSO4, SMT-4	获取价格
A3425LL	ALLEGRO	Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch	获取价格
A3425LL-T	ALLEGRO	Ultra-Sensitive Dual-Channel Quadrature Hall-Effect Bipolar Switch	获取价格

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