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參數(shù)資料
| 型號： | LTC4216 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Ultralow Voltage Hot Swap Controller |
| 中文描述： | 超低電壓熱插拔控制器 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 277K |
| 代理商： | LTC4216 |
LTC4216
19
Figure 13. Connecting Transient Protection
Devices to the LTC4216’s Load Supply Rail
the plug-in boards, the LTC4216 provides two separate
pins for bias supply input and load supply sensing. With
this configuration, an RC network, R
Y
and C
Y
, shown in
Figure 13, can be used with the V
CC
pin to ride out supply
glitches during output-shorts or adjacent board shorts.
The RC network shown has a time constant of 7μs and
this is good enough for the supply to ride out most supply
glitches, preventing the device from entering an under-
voltage lockout condition unnecessarily or losing supply
temporarily. When V
CC
and SENSEP pins are connected
together, the R
Y
value should be chosen such that V
CC
pin
voltage is lower than SENSEP by 70mV; otherwise, part of
V
CC
pin current will be diverted through SENSEP pin.
This unique scheme of separating the device’s supply input
and sensing also provides the flexibility of operating the
load supply from ground to its supply rail with a minimum
bias supply voltage of 2.3V. For proper operation, the load
supply is required to be equal to or less than the bias sup-
ply voltage (maximum 6V).
Supply Transients Protection
There are two methods used in most applications to
eliminate supply transients:
1. Transient voltage suppressor to clip the transient to
a safe level.
2. Snubber (series RC) network.
For applications with load supply voltages of 3.3V or
higher, the ringing and overshoot during hot-swap-
ping or output-shorts can easily exceed the absolute
maximum rating of the LTC4216. To minimize the risk,
a transient voltage suppressor and snubber network
are highly recommended at the SENSEP pin. For ap-
plications with load supply voltages of 2.5V or below,
usually a snubber network is adequate to reduce the
supply ringing.
Figure 13 shows the connections of the supply tran-
sient protection devices, Z1, R
X
and C
X
, around the
LTC4216. The RC network, R
Y
and C
Y
, at the V
CC
pin
also serve as a snubber circuit for the load supply
(V
IN
)
.
On the PCB layout, these transient protection devices
should be mounted very close to the LTC4216’s load
supply rail using short lead lengths to minimize lead
inductance.
SENSEP SENSEN GATE
V
CC
GND
GND
FB
FILTER
TIMER
LTC4216**
C
Y
0.33
μ
F
C
X
0.1
μ
F
R4
R3
SS
C1
Z1
Z1: SMAJ6.0A
**ADDITIONAL DETAILS
OMITTED FOR CLARITY
C2
M1
C3
V
OUT
5V
C
LOAD
R
SENSE
R
Y
22
R
X
10
+
4216 F13
V
IN
5V
APPLICATIU
W
U
U
Staggered Pins Connections
The LTC4216 can be used on either the backplane side of
the connector or a printed circuit board, and examples for
both are shown in Figure 14 and 15. Printed circuit board
edge connectors with staggered pins are recommended as
the insertion and removal of circuit boards will sequence
the pin connections. Supplies (V
CC
and SENSEP) and
ground connections on the printed circuit board should
be wired to the long pins or blades of the edge connector.
Control signal (ON) and status signals (
R
E
S
E
T and
F
A
U
L
T)
passing through the edge connector should be wired to
short pins or blades.
Backplane and PCB Connection Sensing
The LTC4216’s ON pin can be used in various ways to
detect whether the printed circuit board is seated properly
in the backplane connector before the LTC4216 begins a
start-up cycle.
An example is shown in Figure 14, in which the LTC4216
is mounted on the PCB and the R1/R2 resistive divider
is connected to the ON pin. On the edge connector, R2
is wired to a short pin. Before the connectors are mated,
the ON pin is held low by R1, keeping the LTC4216 in an
off state. When the connectors are mated, the resistive
divider is connected to the load supply (V
IN
) and the ON
pin voltage rises above 0.8V, turning the LTC4216 on.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4216CDE | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP |
| LTC4216CDE#PBF | 功能描述:IC CTLR HOT SWAP 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4216CDE#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP T/R |
| LTC4216CDE#TRPBF | 功能描述:IC CNTRLR HOT SWAP 12-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4216CMS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Ultralow Voltage Hot Swap Controller |
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