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參數(shù)資料
| 型號(hào)： | LTC1921 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual .48V Supply and Fuse Monitor |
| 中文描述： | 雙.48 V電源和熔斷器監(jiān)視器 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 177K |
| 代理商： | LTC1921 |
1
LTC1921
1921i
Dual –48V Supply
and Fuse Monitor
May 2002
The LTC
1921 monitors two independent –48V supplies,
including their fuses, and drives up to three optoisolators
to indicate status, in accordance with standard backplane
specifications. Requiring only three noncritical resistors
and optoisolators, the LTC1921 replaces multiple voltage
comparators, a voltage reference and several precision
resistors.
The monitor features dual supply overvoltage and under-
voltage detection circuits. The preset trip thresholds in-
clude overvoltage, undervoltage and undervoltage recovery
that are guaranteed over temperature and meet or exceed
common backplane specifications. Additional built-in cir-
cuitry detects the condition of supply fuses. Overvoltage
and undervoltage detectors ignore fast supply transients,
eliminating false detection. The LTC1921 operates from
–10V to –80V with a typical power dissipation of less than
10mW.
The LTC1921 is available in an 8-pin MSOP package.
I
Independently Monitors Two –48V Supplies for
– Undervoltage Faults: –38.5V
±
1V
MAX
– Overvoltage Faults: –70V
±
1.5V
MAX
I
Accurately Detects Undervoltage Fault Recovery:
–43V
±
0.5V
MAX
I
Monitors Two External Fuses
I
Operates from –10V to –80V
I
Tolerates DC Faults to –100V
I
Tolerates Accidental Supply Reversal to 100V
I
Withstands Transient Voltages Up to 200V/–200V
I
Small Footprint: 8-Lead MSOP Package
I
Requires No Precision External Components
I
Specified from –40
°
C to 85
°
C
I
Telecom Backplanes or Switch Cards
I
Networking Backplanes or Switch Cards
I
High Voltage Fuse Monitoring
, LTC and LT are registered trademarks of Linear Technology Corporation.
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
FUSE GOOD
SUPPLY A GOOD
MOC207
MOC207
MOC207
1921 TA01
SUPERVISOR
μ
P
LOGIC
SUPPLY
LOGIC
COMMON
47k
47k
47k
R3
47k
1/4W
SUPPLY B GOOD
OUT F
V
A
3
4
5
7
2
8
1
6
V
B
FUSE A
FUSE B
RTN
LTC1921
OUT A
OUT B
D1 MURS320
F1
SUPPLY A
–48V
SUPPLY B
–48V
F2
D2 MURS320
R1
100k
–48V
RETURN
R2
100k
–48V LOAD
Final Electrical Specifications
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1921CMS8 | 功能描述:IC DUAL PWR SUPPLY MONITOR 8MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC1921CMS8#PBF | 功能描述:IC DUAL PWR SUPPLY MONITOR 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC1921CMS8#TR | 功能描述:IC DUAL PWR SUPPLY MONITOR 8MSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC1921CMS8#TRPBF | 功能描述:IC DUAL PWR SUPPLY MONITOR 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| LTC1921CS8 | 功能描述:IC DUAL PWR SUPPLY MONITOR 8SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 電源控制器，監(jiān)視器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 應(yīng)用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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