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參數(shù)資料
| 型號： | LTC4216CMS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Ultralow Voltage Hot Swap Controller |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 277K |
| 代理商： | LTC4216CMS |
LTC4216
4216f
8
Hot Circuit Insertion
When circuit boards are inserted into a live backplane, the
supply bypass capacitors can draw huge transient current
from the power bus as they charge. Potentially, the flow
of current could damage the connector pins and glitch
the power bus, causing other boards in the system to
reset. The LTC4216 is designed to turn on or off a circuit
board supply in a controlled manner, allowing insertion
or removal without glitches or connector damage.
Overview of LTC4216 Features
1. Allows safe board insertion and removal from a live
backplane.
2. Controls load voltages from 0V to 6V.
3. High side gate drive for external N-channel MOSFET.
4. Adjustable soft-start with inrush current limiting for
large load capacitor during start-up.
5. Adjustable analog current limit (ACL) with circuit
breaker fault time-out during an overcurrent fault condi-
tion. No external gate capacitor is required for the ACL
loop compensation.
6. Electronic circuit breaker tripping at 25mV across the
sense resistor. The response time is adjustable through
an external capacitor at the FILTER pin.
7. Provides an ON pin to turn on and off the device. This
can also be used to reset the device after a circuit breaker
trip.
8. Provides output supply voltage monitoring through the
FB pin and signals the
R
E
S
E
T pin output.
9. Provides fault status output.
ON Control
The ON pin has two hysteretic comparators with differ-
ent threshold levels (0.8V and 0.4V) and they serve two
purposes:
1. Turn on the device if the ON pin voltage > 0.8V for more
than 6μs and turn it off if the ON pin voltage < 0.72V for
more than 15μs.
2. Reset the device if the ON pin voltage < 0.4V for more
than 30μs after a circuit breaker trip.
There are various methods of setting the ON pin
voltage:
1. Tie the ON pin to the load supply (V
IN
) through a 10k
pull-up resistor.
2. Drive the ON pin with an ON/OFF logic signal from the
system controller.
3. Connect an external resistive divider at the ON pin.
This divider can be used to set a higher value for the load
supply undervoltage lockout voltage than the internal V
CC
undervoltage lockout circuit.
For example, as shown in Figure 17, if both V
CC
and
SENSEP pins are connected to a 5V load supply, choosing
the resistive divider values, R1 = 20k, R2 = 80.6k, turns on
the device when the load supply voltage reaches around
80% of its final value.
V
CC
Undervoltage Lockout
A hysteretic comparator, UVLO, monitors bias supply (V
CC
)
for undervoltage. The thresholds are defined by V
CC(UVL)
(2.12V) and its hysteresis,
Δ
V
CC(UVL,HYST)
(120mV).
When V
CC
rises above V
CC(UVL)
, the device is enabled.
When V
CC
falls below (V
CC(UVL)
–
Δ
V
CC(UVL,HYST)
), the
device is disabled and GATE is pulled low. If V
CC
cycles
below this threshold for more than 200μs, following a
circuit breaker trip, it clears the fault latch. Any bias sup-
ply glitches that last less than 10μs will be rejected by the
UVLO glitch filter.
Timer
An external capacitor, C1, is used at TIMER pin to provide
two timing cycles for the LTC4216. The first timing cycle
is the debounce cycle when the ON pin is first turned on,
both the GATE and SS pins are held low and any short-
circuit faults are ignored by the electronic circuit breaker.
Second timing cycle is the power-good delay before the
R
E
S
E
T pin goes high when the FB pin voltage exceeds
0.6V and its hysteresis.
The TIMER pin sources 2μA into C1 during the two timing
cycles and is then pulled low by an internal N-channel
APPLICATIU
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4216CMS#PBF | 功能描述:IC CNTRLR HOT SWAP 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關: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） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4216CMS#TRPBF | 功能描述:IC CNTRLR HOT SWAP 10-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關: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） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4216IDE | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP |
| LTC4216IDE#PBF | 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:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關: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） 供應商設備封裝:10-MSOP 包裝:管件 |
| LTC4216IDE#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 6V 12-Pin DFN EP T/R |
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