參數(shù)資料
型號(hào)： MIC2583R-JBQS
廠商： MICREL INC
元件分類： 電源管理
英文描述： Single Channel Hot Swap Controllers
中文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16
封裝： QSOP-16
文件頁數(shù)： 15/22頁
文件大?。?/td> 190K
代理商： MIC2583R-JBQS
April 2003
15
MIC2582/MIC2583
MIC2582/MIC2583
Applications Information
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
±
5%, thus the resulting output voltage
may be as low as 11.4V and as high as 12.6V. Additionally,
the FB threshold has
±
50mV 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 so as to limit the current through the
divider to approximately 100
μ
A or less.
Micrel
R6
V
100 A
1.29V
100 A
12.9k
FB(MAX)
.
R6 is chosen as 12.4k
±
1%.
2) Next, determine R5 using the output
“
good
”
voltage of 11V and the following equation:
V
V
R5 R6
R6
OUT(Good)
FB
=
(
)
(9)
Using some basic algebra and simplifying Equation 9 to
isolate R5, yields:
R5
R6
V
V
–
1
OUT(Good)
FB(MAX)
=
(9.1)
where V
FB(MAX)
= 1.29V, V
OUT(Good)
= 11V, and R6 is
12.4k
. Substituting these values into Equation 9.1 now
yields R5 = 93.33k
. A standard 93.1k
±
1% 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.
PCB Connection Sense
There are several configuration options for the MIC2582/83
’
s
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, 12V in this
example, and the ON pin voltage exceeds its threshold (V
ON
)
of 1.24V and the MIC2582/83 initiates a start-up cycle. In
Figure 6, the connection sense consisting of a discrete
logic-level MOSFET and a few resistors allows for interrupt
GND
/ON_OFF
C3
0.05 F
SENSE
VCC
ON
CPOR
DIS
FB
GATE
GND
7,8
/POR
/FAULT
Long
Pin
Backplane
Connector
PCB Edge
Connector
Long
Pin
Medium or
Short Pin
Undervoltage (Output) = 4.45V
/POR Delay = 25ms
START-UP Delay = 6ms
*Q2 is TN0201T (SOT-23)
**R8 is optional for noise filtering
Additional pins omitted for clarity.
Downstream
Signal
Short
Pin
PCB Connection Sense
Q1
Si7860DP
(PowerPAK
“
SO-8)
**R8
10
R7
10.5k
1%
R4
20k
R1
33k
R3
100
*Q2
R9
20
MIC2583
C1
1 F
C2
0.01 F
R5
20k
C
220 F
R2
33k
R6
27.4k
1%
V
5V@3A
V
IN
V
IN
5V
/FAULT
1
4
16
15
12
13
3
11
14
R
0.010
5%
1
2
3
4
Figure 6. PCB Connection Sense with ON/OFF Control
相關(guān)PDF資料
PDF描述
MIC2583R-KBQS Single Channel Hot Swap Controllers
MIC2583R-LBQS Single Channel Hot Swap Controllers
MIC2583R-MBQS Single Channel Hot Swap Controllers
MIC2592B Dual-Slot PCI Express Hot-Plug Controller
MIC2592B-2BTQ Dual-Slot PCI Express Hot-Plug Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MIC2583R-JBQS TR 功能描述:IC CTRLR HOT SWAP 100MV 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
MIC2583RJYQS 制造商:Micrel Inc 功能描述:
MIC2583R-JYQS 功能描述:熱插拔功率分布 Single-Channel Hot-Swap Controller - 100mV Fast-Trip Threshold - Lead Free RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MIC2583R-JYQS TR 功能描述:熱插拔功率分布 Single-Channel Hot-Swap Controller - 100mV Fast-Trip Threshold - Lead Free RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube
MIC2583R-KBQS 功能描述:IC CTRLR HOT SWAP 100MV 16-QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:100 系列:- 類型:熱插拔開關(guān) 應(yīng)用:通用 內(nèi)部開關(guān):是 電流限制:可調(diào) 電源電壓:9 V ~ 13.2 V 工作溫度:-40°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN-EP（3x3） 包裝:管件
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

*
*
*