參數(shù)資料
型號(hào)： LTC4214-1IMS#TRPBF
廠商： Linear Technology
文件頁(yè)數(shù)： 14/32頁(yè)
文件大?。?/td> 277K
描述： IC CTRLR HOTSWAP NEGVOLT 10MSOP
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(kāi)關(guān)： 無(wú)
電源電壓： 6 V ~ 16 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： 帶卷 (TR)
LTC4214-1/LTC4214-2
14
421412f
UV/OV OPERATION
A low input to the UV comparator will reset the LTC4214
and pull the GATE and TIMER pins low. A low-to-high UV
transition will initiate an initial timing sequence if the other
interlock conditions are met. A high-to-low transition in
the UV comparator immediately shuts down the LTC4214,
pulls the MOSFET gate low and resets the latched PWRGD
high.
Overvoltage conditions detected by the OV comparator
will also pull GATE low, thereby shutting down the load.
However, it will not reset the circuit breaker TIMER,
PWRGD flag or shutdown cooling timer. Returning the
supply voltage to an acceptable range restarts the GATE
pin if all the interlock conditions except TIMER are met.
Only during the initial timing cycle does an OV condition
reset the TIMER.
DRAIN
Connecting an external resistor, R
D
, to the dual function
DRAIN pin allows V
OUT
 sensing without it being damaged
by large voltage transients. Below 3V, negligible pin leak-
age allows a DRAIN low comparator to detect V
OUT
 less
than 1.232V (V
DRNL
). This condition, together with the
GATE low comparator, sets the PWRGD flag.
If V
OUT
 > V
DRNCL
 (4.2V), the DRAIN pin is clamped at about
4.2V and the current flowing in R
D
 is given by:
I
V
V
R
DRN
OUT
DRNCL
D
H

(1)
This current is scaled up 8 times during a circuit breaker
fault and is added to the nominal 40礎(chǔ) TIMER current. This
accelerates the fault TIMER pull-up when the MOSFETs
drain-source voltage exceeds 4.2V and effectively short-
ens the MOSFET heating duration.
TIMER
The operation of the TIMER pin is somewhat complex as
it handles several key functions. A capacitor C
T
 is used at
TIMER to provide timing for the LTC4214. Four different
charging and discharging modes are available at TIMER:
1) A 5礎(chǔ) slow charge; initial timing and shutdown cooling
delay.
2) A (40礎(chǔ) + 8 " I
DRN
) fast charge; circuit breaker delay.
3) A 5礎(chǔ) slow discharge; circuit breaker "cool off" and
shutdown cooling.
4) Low impedance switch; resets the TIMER capacitor
after an initial timing delay, in UVLO, in UV and in OV
during initial timing.
For initial start-up, the 5礎(chǔ) pull-up is used. The low
impedance switch is turned off and the 5礎(chǔ) current source
is enabled when the interlock conditions are met. C
T
charges to 3V in a time period given by:
V  C
A
T
=
3
5
"
(2)
When C
T
 reaches 3V (V
TMRH
), the low impedance switch
turns on and discharges C
T
. A GATE start-up cycle begins
and both SS and GATE are released.
CIRCUIT BREAKER TIMER OPERATION
If the SENSE pin detects more than a 50mV drop across
R
S
, the TIMER pin charges C
T
 with (40礎(chǔ) + 8 " I
DRN
). If C
T
charges to 3V, the GATE pin pulls low and the LTC4214-1
latches off while the LTC4214-2 starts a shutdown cooling
cycle. The LTC4214-1 remains latched off until the UV pin
is momentarily pulsed low or TIMER is momentarily
discharged low by an external switch or V
IN
 dips below
UVLO and is then restored. The circuit breaker timeout
period is given by:
t
V  C
A
I
T
DRN
=
?nbsp +
3
40
8
"
"
(3)
If V
OUT
< 3V, an internal PMOS device isolates any DRAIN
pin leakage current, making I
DRN
= 0礎(chǔ) in Equation (3). If
V
OUT
 > 4.2V (V
DRNCL
) during the circuit breaker fault period,
the charging of C
T
 accelerates by 8 " I
DRN
 of Equation (1).
Intermittent overloads may exceed the 50mV threshold at
SENSE, but, if their duration is sufficiently short, TIMER
will not reach 3V and the LTC4214 will not shut the external
APPLICATIO  S I FOR  ATIO
U
U
U
相關(guān)PDF資料
PDF描述
LTC4215IUFD#PBF IC CNTRLR HOT SWAP 24-QFN
LTC4216IDE#TRPBF IC CNTRLR HOT SWAP 12-DFN
LTC4221IGN#TRPBF IC CTRLR HOTSWAP DUAL 16SSOP
LTC4222CG#PBF IC CTRLR DUAL HOT SWAP 36-SSOP
LTC4223CDHD-2#PBF IC CNTRLR HOT SWAP DUAL 16-DFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC4214-2CMS 功能描述:IC CTRLR HOTSWAP NEGVOLT 10MSOP RoHS:否 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(kāi)關(guān):無(wú) 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
LTC4214-2CMS#PBF 功能描述:IC CTRLR HOTSWAP NEGVOLT 10MSOP 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(kāi)關(guān):無(wú) 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
LTC4214-2CMS#TR 功能描述:IC CONTROLLER HOTSWAP NEG 10MSOP RoHS:否 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(kāi)關(guān):無(wú) 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
LTC4214-2CMS#TRPBF 功能描述:IC CTRLR HOTSWAP NEGVOLT 10MSOP RoHS:是 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(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)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
LTC4214-2IMS 功能描述:IC CONTROLLER HOTSWAP NEG 10MSOP 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(kāi)關(guān) 應(yīng)用:通用 內(nèi)部開(kāi)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

*
*
*