- 您現在的位置：買賣IC網 > Datasheet目錄42 > LTC4214-1IMS#TRPBF (Linear Technology)IC CTRLR HOTSWAP NEGVOLT 10MSOP Datasheet資料下載
參數資料
| 型號： | LTC4214-1IMS#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數： | 14/32頁 |
| 文件大?。?/td> | 277K |
| 描述： | IC CTRLR HOTSWAP NEGVOLT 10MSOP |
| 標準包裝： | 2,500 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 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） |
| 供應商設備封裝： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
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 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 slow charge; initial timing and shutdown cooling
delay.
2) A (40礎 + 8 " I
DRN
) fast charge; circuit breaker delay.
3) A 5礎 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 pull-up is used. The low
impedance switch is turned off and the 5礎 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 + 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 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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統，AdvancedTCA ? 系統，高可用性 內部開關:無 電流限制:可調 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 |
| 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:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統，AdvancedTCA ? 系統，高可用性 內部開關:無 電流限制:可調 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 |
| 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:- 標準包裝:50 系列:- 類型:熱交換控制器 應用:-48V 遠程電力系統，AdvancedTCA ? 系統，高可用性 內部開關:無 電流限制:可調 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 |
| 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 內部開關:是 電流限制:可調 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 |
| 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 內部開關:是 電流限制:可調 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 |
發布緊急采購，3分鐘左右您將得到回復。