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參數(shù)資料
| 型號： | LTC4230CGN#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 26/36頁 |
| 文件大?。?/td> | 384K |
| 描述： | IC CONTRLLR HOT SWAP TRPL 20SSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應(yīng)用： | 通用 |
| 內(nèi)部開關(guān)： | 無 |
| 電源電壓： | 1.7 V ~ 16.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SSOP（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SSOP |
| 包裝： | 帶卷 (TR) |
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26
LTC4230
4230f
In the previous three examples, the connection sense was
hard wired with no processor (low) interrupt capability. As
illustrated in Figure 15, the addition of an inexpensive
logic-level discrete MOSFET and a couple of resistors
offers processor interrupt control to the connection sense.
R4 keeps the gate of M2 at V
CC
until the card is firmly
mated to the backplane. A logic low for the ON/OFF signal
turns M2 off, allows the ON pin to pull high and turns on
the LTC4230.
A more elaborate connection sense scheme is shown in
Figure 16. The bases of Q1 and Q2 are wired to short pins
located on opposite ends of the edge connector because
the installation/removal of printed circuit cards generally
requires rocking the card back and forth. When V
CC
makes connection, the bases of transistors Q1 and Q2 are
pulled high, biasing them on. When both are on, the
LTC4230s ON pin is held low, keeping the LTC4230 off.
When the short base connector pins of Q1 and Q2 finally
mate to the backplane, their bases are grounded, biasing
the transistors off. The ON pin is then pulled high by R3
enabling the LTC4230 and a power-up cycle begins.
A software-initiated power-down cycle can be started by
momentarily driving transistor M1 with a logic high signal.
This in turn will drive the LTC4230s ON pin low. If the ON
pin is held low for more than 8祍, the LTC4230s GATEn
pin is switched to ground.
APPLICATIO S I FOR ATIO
U
U
U
+
4
3
2
1
V
CCn
SENSEn
LTC4230*
15
12
14
C
LOAD
V
OUT
5V
5A
4230 F15
R6
15k
GATEn
GND
TIMER
PCB CONNECTION SENSE
C
TIMER
1礔
FBn
ON
SHORT
LONG
V
CC
5V
GND
ON/OFF
LONG
Z1: SMAJ10
M2: 2N7002LT1
*ADDITIONAL DETAILS
OMITTED FOR CLARITY
RESETn
R2
10k
R4
10k
M2
R1
10k
R
X
10&
R
SENSE
0.007&
PCB EDGE
CONNECTOR
(MALE)
M1
Si4410DY
Z1
R5
36k
R7
10k
礟
LOGIC
RESET
SHORT
C
X
100nF
BACKPLANE
CONNECTOR
(FEMALE)
Figure 15. Connection Sense with ON/OFF Control
+
4
3
2
1
V
CCn
SENSEn
LTC4230*
15
12
14
C
LOAD
V
OUT
5V
5A
4230 F16
R5
15k
GATEn
GND
TIMER
PCB CONNECTION SENSE
C
TIMER
1礔
FBn
ON
LONG
V
CC
GND
ON/RESET
LONG
Z1: SMAJ10
M1: 2N7002LT1
Q1, Q2: MMBT3904LT1
*ADDITIONAL DETAILS OMITTED FOR CLARITY
RESETn
M1
R
X
10&
R
SENSE
0.007&
PCB EDGE
CONNECTOR
(MALE)
M2
Si4410DY
Z1
R3
10k
R2
10k
R1
10k
R8
10k
R4
36k
R7
10k
礟
LOGIC
RESET
SHORT
SHORT
LAST BLADE OR PIN ON CONNECTOR
SHORT
C
X
0.1礔
BACKPLANE
CONNECTOR
(FEMALE)
Q1
Q2
LAST BLADE OR PIN ON CONNECTOR
Figure 16. Connection Sense for Rocking the Daughter Board Back and Forth
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| LTC4230IGN | 功能描述:IC CONTRLLR HOT SWAP TRPL 20SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):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(yīng)商設(shè)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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