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參數(shù)資料
| 型號： | LTC1644 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | CompactPCI Bus Hot Swap Controller |
| 中文描述： | CompactPCI總線熱插拔控制器 |
| 文件頁數(shù)： | 20/24頁 |
| 文件大小： | 452K |
| 代理商： | LTC1644 |
LTC1644
20
1644f
C1
0.047
μ
F
GND
5V
IN
5V
IN
D1
5V
SENSE
13
5V
OUT
3
3V
IN
LTC1644*
17
3V
OUT
18
3V
SENSE
16
14
GATE
15
8
R4
10
5V
OUT
1644 F13
R5
1k
R2
0.007
Q2
IRF7413
D2
NC
Z4
D1, D2: BAV99
Z4: 1PMT5.0AT3
*ADDITIONAL PINS OMITTED FOR CLARITY
PCB EDGE
BACKPLANE
CONNECTOR
BACKPLANE
CONNECTOR
5V
LONG 5V
GROUND
R22 2.74
C6
0.01
μ
F
C9 0.1
μ
F
PER 10
POWER PINS
Figure 13. No 3.3V Supply Application Circuit
APPLICATIU
W
U
U
Figure 14. BD_SEL# Pushbutton Toggle Switch
GND
LTC1644*
8
1.2k
PUSHBUTTON
SWITICH
100
5V
IN
1k
GROUND
OFF/ON
5
BD_SEL#
1644 F14
*ADDITIONAL PINS OMITTED FOR CLARITY
PCB EDGE
BACKPLANE
CONNECTOR
BACKPLANE
CONNECTOR
restricts the choice of power MOSFETs to those devices
with very low R
DS(ON)
. Table 9 lists some power MOSFETs
that can be used with the LTC1644.
Power MOSFETs are classified into two categories: stan-
dard MOSFETs (R
DS(ON)
specified at V
GS
= 10V) and logic-
level MOSFETs (R
DS(ON)
specified at V
GS
= 5V). Since
external pass transistors are required for the 3.3V and 5V
supply rails, logic-level power MOSFETs should be used
with the LTC1644.
Overvoltage Transient Protection
Good engineering practice calls for bypassing the supply
rail of any analog circuit. Bypass capacitors are often
placed at the supply connection of every active device, in
addition to one or more large-value bulk bypass capacitors
per supply rail. If power is connected abruptly, the large
bypass capacitors slow the rate of rise of the supply
voltage and heavily damp any parasitic resonance of lead
or PC track inductance working against the supply bypass
capacitors.
The opposite is true for LTC1644 Hot Swap circuits
mounted on plug-in cards. In most cases, there is no
supply bypass capacitor present on the powered 12V
(12V
IN
), –12V (V
EEIN
) of the PCB edge connector or on the
3.3V (3V
IN
) or the 5V (5V
IN
) side of the MOSFET switch. An
abrupt connection, produced by inserting the board into a
backplane connector, results in a fast rising edge applied
on these input supply lines of the LTC1644.
Since there is no bulk capacitance to damp the parasitic
track inductance, supply voltage transients excite para-
sitic resonant circuits formed by the power MOSFET
capacitance and the combined parasitic inductance from
the wiring harness, the backplane and the circuit board
traces. These ringing transients appear as a fast edge on
the input supply lines, exhibiting a peak overshoot up to
2.5 times the steady-state value followed by a damped
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1644CGN | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:100 系列:- 類型:熱插拔開關 應用:通用 內(nèi)部開關: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 供應商設備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1644CGN#PBF | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內(nèi)部開關:無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC1644CGN#TR | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:100 系列:- 類型:熱插拔開關 應用:通用 內(nèi)部開關: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 供應商設備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1644CGN#TRPBF | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:100 系列:- 類型:熱插拔開關 應用:通用 內(nèi)部開關: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 供應商設備封裝:10-TDFN-EP（3x3） 包裝:管件 |
| LTC1644IGN | 功能描述:IC CONTROLLER HOT SWAP 20-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內(nèi)部開關:無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
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