- 您现在的位置：买卖IC网 > PDF目录18803 > A1190LUA-T (Allegro Microsystems Inc)IC SW HALL EFFECT CHOPPER 3SIP PDF资料下载
参数资料
| 型号： | A1190LUA-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 15/18页 |
| 文件大小： | 383K |
| 描述： | IC SW HALL EFFECT CHOPPER 3SIP |
| 特色产品： | A119x Switches |
| 标准包装： | 4,000 |
| 类型： | 单极开关 |
| 电源电压： | 3 V ~ 24 V |
| 电流 - 电源： | 5mA |
| 输出类型： | 数字 |
| 特点： | 可编程 |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 3-SSIP |
| 供应商设备封装： | 3-SIP |
| 包装： | 散装 |
| 其它名称： | 620-1406 |
Power Derating
Programmable, Chopper-Stabilized,
Two Wire Hall-Effect Switches
A1190, A1192,
and A1193
15
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
The device must be operated below the maximum junction tem-
perature of the device, T
J
(max). Under certain combinations of
peak conditions, reliable operation may require derating supplied
power or improving the heat dissipation properties of the appli-
cation. 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
= 4 mA, and R
qJA
= 140 癈/W, then:
P
D
= V
CC
?/DIV>
I
CC
= 12 V
?/DIV>
4 mA = 48 mW
DT = P
D
?/DIV>
R
qJA
= 48 mW
?/DIV>
140 癈/W = 7癈
T
J
= T
A
+ DT = 25癈 + 7癈 = 32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 UA, using a
low-K PCB.
Observe the worst-case ratings for the device, specifically:
R
qJA
=
165 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 ?165 癈/W = 91 mW
Finally, invert equation 1 with respect to voltage:
V
CC(est)
= P
D
(max)
? I
CC
(max) = 91 mW ?17 mA = 5 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.
相关PDF资料 |
PDF描述 |
|---|---|
| R9G23412CSOO | RECTIFIER FAST REC 3400V 1200A |
| A1192LUA-T | IC SW HALL EFFECT CHOPPER 3SIP |
| R9G02612XX | RECTIFIER 2600V 1200A |
| P143-125.0M | OSC 125.0000MHZ 3.3V LVPECL SMD |
| P223-100.0M | OSC 100.0000MHZ 3.3V LVPECL SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| A1190LUBTN-T | 功能描述:2-WIRE FIELD PROGRAMMABLE SWITCH 制造商:allegro microsystems, llc 系列:* 零件状态:新产品 标准包装:1 |
| A1191 | 制造商:Quick 功能描述:SIP 25L 25mm Nozzle for 21-13205 and 21-13210 制造商:QUICK 功能描述:SIP 25L NOZZLE FOR QUICK957/957D |
| A-1191-1 | 功能描述:固态继电器-工业安装 DC SOLENOID RoHS:否 制造商:Crydom 控制电压范围:4 VDC to 32 VDC 负载电压额定值:7 VDC to 72 VDC 负载电流额定值:160 A 触点形式: 输出设备:SSR 安装风格:Panel |
| A1192 | 制造商:Quick 功能描述:SIP 50LNOZZLE FOR QUICK957/957D |
| A11927-01 | 制造商:LAIRD TECHNOLOGIES - THERMAL MATERIALS 功能描述:TGON 810 SA 18" X 23" 制造商:Laird Technologies Inc 功能描述:TGON 810 SA 18" X 23" 制造商:Laird Technologies Inc 功能描述:TGON 810,SA / 18 X 23 |
发布紧急采购，3分钟左右您将得到回复。