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参数资料
| 型号： | MIC2583-MYQS TR |
| 厂商： | Micrel Inc |
| 文件页数： | 16/25页 |
| 文件大小： | 826K |
| 描述： | IC CTRLR HOT SWAP 200MV 16-QSOP |
| 标准包装： | 2,500 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电源电压： | 2.3 V ~ 13.2 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC2583-MYQSTR MIC2583-MYQSTR-ND |
Micrel, Inc.
MIC2582/MIC2583
April 2009
16
M9999-043009-C
Application Information
Design Consideration for Output Undervoltage
Detection
For output undervoltage detection, the first consideration
is to establish the output voltage level that indicates
power is good. For this example, the output value for
which a 12V supply will signal good is 11V. Next,
consider the tolerances of the input supply and FB
threshold (V
FB
). For this example, the 12V supply varies
?%, thus the resulting output voltage may be as low as
11.4V and as high as 12.6V. Additionally, the FB
threshold has ?0mV tolerance and may be as low as
1.19V and as high as 1.29V. Thus, to determine the
values of the resistive divider network (R5 and R6) at the
FB pin, shown in the typical application circuit on page 1,
use the following iterative design procedure.
1) Choose R6 to allow 100礎 or more in the FB
resistive divider branch.
k&
.
A
A
R
9
12
100
1.29V
100
V
6
FB(MAX)
=
=
=
?/DIV>
?/DIV>
R6 is chosen as 12.4k& ?%.
2) Next, determine R5 using the output good
voltage of 11V and the following equation:
(
)
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
+
=
R6
R6
R5
FB
OUT(Good)
V
V
(9)
Using some basic algebra and simplifying Equation 9 to
isolate R5, yields:
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
?/DIV>
=
1
6
5
FB(MAX)
OUT(Good)
V
V
R
R
(9.1)
where V
FB(MAX)
= 1.29V, VOUT(Good) = 11V, and R6 is
12.4k&. Substituting these values into Equation 9.1 now
yields R5 = 93.33k&. A standard 93.1k& ?% is selected.
Now, consider the 11.4V minimum output voltage, the
lower tolerance for R6 and higher tolerance for R5,
12.28k& and 94.03k&, respectively. With only 11.4V
available, the voltage sensed at the FB pin exceeds
V
FB(MAX)
, thus the /POR and PWRGD (MIC2583/83R)
signals will transition from LOW to HIGH, indicating
power is good given the worse case tolerances of this
example. Lastly, in giving consideration to the leakage
current associated with the FB input, it is recommended
to either: 1) provide ample design margin (20mV to
30mV) to allow for loss in the potential (V) at the FB
pin, or 2) allow >>100礎 to flow in the FB resistor
network.
PCB Connection Sense
There are several configuration options for the
MIC2582/83s ON pin to detect if the PCB has been fully
seated in the backplane before initiating a start-up cycle.
In the typical applications circuit, the MIC2582/83 is
mounted on the PCB with a resistive divider network
connected to the ON pin. R2 is connected to a short pin
on the PCB edge connector. Until the connectors mate,
the ON pin is held low which keeps the GATE output
charge pump off. Once the connectors mate, the resistor
network is pulled up to the input supply,
Figure 6. PCB Connection Sense with ON/OFF Control
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2583R-JBQS | 功能描述:IC CTRLR HOT SWAP 100MV 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| MIC2583R-JBQS TR | 功能描述:IC CTRLR HOT SWAP 100MV 16-QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:100 系列:- 类型:热插拔开关 应用:通用 内部开关:是 电流限制:可调 电源电压:9 V ~ 13.2 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:10-WFDFN 裸露焊盘 供应商设备封装:10-TDFN-EP（3x3） 包装:管件 |
| MIC2583RJYQS | 制造商:Micrel Inc 功能描述: |
| MIC2583R-JYQS | 功能描述:热插拔功率分布 Single-Channel Hot-Swap Controller - 100mV Fast-Trip Threshold - Lead Free RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| MIC2583R-JYQS TR | 功能描述:热插拔功率分布 Single-Channel Hot-Swap Controller - 100mV Fast-Trip Threshold - Lead Free RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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