- 您現在的位置：買賣IC網 > Datasheet目錄42 > LTC4261IGN-2#PBF (Linear Technology)IC CTRLR HOTSWAP W/ADC 28-SSOP Datasheet資料下載
參數資料
| 型號： | LTC4261IGN-2#PBF |
| 廠商： | Linear Technology |
| 文件頁數： | 19/34頁 |
| 文件大?。?/td> | 361K |
| 描述： | IC CTRLR HOTSWAP W/ADC 28-SSOP |
| 標準包裝： | 49 |
| 類型： | 熱交換控制器 |
| 應用： | 通用 |
| 內部開關： | 無 |
| 電源電壓： | 9 V ~ 11.2 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 28-SSOP |
| 包裝： | 管件 |
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頁第14頁第15頁第16頁第17頁第18頁當前第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頁第33頁第34頁
LTC4261/LTC4261-2
19
42612fc
overvoltage auto-retry has been disabled by clearing reg-
ister bit D0.
Undervoltage Comparator and Undervoltage Fault
The LTC4261/LTC4261-2 provide two undervoltage pins,
UVH and UVL, for adjustable UV threshold and hyster-
esis. The UVH and UVL pins have the following accurate
thresholds:
For UVH rising, V
UVH(TH)
= 2.56V, turn on
For UVL falling, V
UVL(TH)
= 2.291V, turn off
Both UVH and UVL pins have a minimum hysteresis of
dV
UV
(15mV typical). In either a rising or a falling input
supply, the undervoltage comparator works in such a way
that both the UVH and the UVL pins have to cross their
thresholds for the comparator output to change state.
The UVH, UVL, and OV threshold ratio is designed to
match the standard telecom operating range of 43V to
71V and UV hysteresis of 4.5V when UVH and UVL are
tied together as in Figure 1, where the built-in UV hyster-
esis referred to the UVL pin is:
DV
UV(HYST)
= V
UVH(TH)
V
UVL(TH)
= 0.269V
Using R1 = 11.8k, R2 = 16.9k and R3 = 453k as in Figure 1
gives a typical operating range of 43.0V to 70.7V, with
an undervoltage shutdown threshold of 38.5V and an
overvoltage shutdown threshold of 72.3V.
The UV hysteresis can be adjusted by separating the
UVH and the UVL pins with a resistor R
H
(Figure 8). To
increase the UV hysteresis, the UVL tap should be placed
above the UVH tap as in Figure 7a. To reduce the UV hys-
teresis, place the UVL tap under the UVH tap as in Figure
7b. UV hysteresis referred to the UVL pin is given by:
for V
UVL
e V
UVH
,
DV
UVL(HYST)
= DV
UV(HYST)
+ 2.56V
R
H
R1+R2
or for V
UVL
< V
UVH
,
DV
UVL(HYST)
= DV
UV(HYST)
2.56V
R
H
R1+R2+R
H
For V
UVL
< V
UVH
, the minimum UV hysteresis allowed is
the minimum hysteresis at UVH and UVL: dV
UV
= 15mV
when R
H(MAX)
= 0.11 " (R1 + R2)
The design of the LTC4261/LTC4261-2 protects the UV
comparator from chattering even when R
H
is larger than
R
H(MAX)
.
An undervoltage fault occurs when the UVL pin falls
below 2.291V and the UVH pin falls below 2.56V dV
UV
.
This activates the FET turn-off and sets the undervoltage
Figure 7. 36V to 72V Step Response
APPLICATIONS INFORMATION
RTN V
EE
TMR
SS
GATE
V
OUT
SENSE
PG
PGIO
36V
0V
2.56V
V
GATEH
LOAD
LOAD
0V
0V
42612 F07
50mV
LOAD + INRUSH
FET V
TH
72V
相關PDF資料 |
PDF描述 |
|---|---|
| LTC4263IS#TRPBF | IC IEEE 803.2AF CNTRLR 14-SOIC |
| LTC4268IDKD-1#PBF | IC PD HIGH POWER W/CNTRL 32-DFN |
| LTC4274CUHF#PBF | IC CONTROLLER POE 38-QFN |
| LTC4280CUFD#PBF | IC CONTROLLER HOT SWAP QFN-24 |
| LTC4300-1IMS8#TRPBF | IC HOTSWAP 2WIRE BUS BUFFR 8MSOP |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC4261IUFD | 功能描述:IC CTRLR HOTSWAP W/ADC 24-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關: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 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4261IUFD#PBF | 功能描述:IC CTRLR HOTSWAP W/ADC 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關: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 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4261IUFD#TR | 功能描述:IC CTRLR HOTSWAP W/ADC 24-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關: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 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4261IUFD#TRPBF | 功能描述:IC CTRLR HOTSWAP W/ADC 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:119 系列:- 類型:熱交換控制器 應用:通用型，PCI Express? 內部開關: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 供應商設備封裝:80-TQFP（12x12） 包裝:托盤 產品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4261IUFD-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring |
發(fā)布緊急采購，3分鐘左右您將得到回復。