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參數資料
| 型號： | ADM1070 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | -48 V Hot Swap Controller |
| 中文描述： | -48 V熱風熱插拔控制器 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 367K |
| 代理商： | ADM1070 |
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a
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
Tel: 781/329-4700Fax: 781/326-8703
Analog Devices, Inc., 2002ADM1070
–48 V Hot Swap Controller
FUNCTIONAL BLOCK DIAGRAM
V
AND
REFERENCE
GENERATOR
OVER-UNDER
VOLTAGE DETECTION
CIRCUIT
FAULT TIMER AND
CONTROL
OSCILLATOR
SENSE
0V
V
DD
R1
R2
–48V
V
EE
UV/OV
TIMER
R
DROP
12V
16k
V
IN
V
CC
V
REF
EN
100mV
V
IN
45 A
GATE
V
EE
R
SENSE
C
LOAD
V
OUT
(
)
*
*
OPTIONAL TIMER CAPACITOR
ADM1070
Q1
FEATURES
Allows Safe Board Insertion and Removal from a Live
–48 V Backplane
Typically Operates from –36 V to –80 V
Tolerates Transients up to –200 V (Limited by External
Components)
Accurate Programmable Linear Current Limit for
In-Rush Control and Short Circuit Protection
Programmable Timeout in Current Limit
Limited Consecutive Retry:
Auto-Restart after Current Limit Timeout
Shutdown after Seven Consecutive Auto Restarts
Provides Immunity from Step Induced Current Spikes
Default Timing Provided with no TIMER Capacitor
Single Pin Undervoltage/Overvoltage Detection
Programmable Operating Voltage Window
Programmable Undervoltage/Overvoltage Time Filter
Small 6-Lead SOT-23 Package
APPLICATIONS
Central Office Switching
–48 V Distributed Power Systems
Negative Power Supply Control
Hot Board Insertion
Electronic Circuit Breaker
High Availability Servers
Programmable Current Limiting Circuit
–48 V Power Supply Modules
GENERAL DESCRIPTION
The ADM1070 is a negative voltage hot swap controller that
allows a board to be safely inserted and removed from a live
–48 V backplane. The part achieves this by providing robust
current limiting, protection against transient and nontransient
short circuits and overvoltage and undervoltage conditions. The
ADM1070 typically operates from a negative voltage of up to
–80 V and can tolerate transient voltages of up to –200 V.
In-rush current is limited to a programmable value by control-
ling the gate drive of an external N-channel FET. The current
limit can be controlled by the choice of the sense resistor,
R
SENSE
. Added control of the in-rush current is provided by an
on-chip timer that uses pulsewidth modulation to allow the
maximum current to flow for only 3% of the time. An autorestart
occurs after a current limit timeout. After seven successive
autorestarts, the fault will be latched and the part goes into
shutdown with the result that the external FET is disabled until
the power is reset.
The ADM1070 also features single-pin undervoltage and over-
voltage detection. The FET is turned off if a nontransient
voltage less than the undervoltage threshold, typically –36 V, or
greater than the overvoltage threshold, typically –77 V, is detected
on the UV/OV Pin. The operating voltage window of the
ADM1070 is programmable and is determined by the ratio R1/R2.
Time filtering on the undervoltage and overvoltage detection
and current limiting is programmable via the TIMER Pin. An
external capacitor connected between the TIMER Pin and V
EE
determines the undervoltage/overvoltage time filter and the
timeout in current limit. If the pin is tied to V
EE
, the time filter
values and the current limit timeout revert to default figures.
The ADM1070 is fabricated using BiCMOS technology for mini-
mal power consumption. The part is available in a small
6-Lead SOT-23 package.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1070ART | 制造商:AD 制造商全稱:Analog Devices 功能描述:-48 V Hot Swap Controller |
| ADM1070ART-REEL | 制造商:Analog Devices 功能描述:Hot Swap Controller 1-CH -80V 6-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel |
| ADM1070ART-REEL7 | 功能描述:IC CTRL HOTSWAP -48 SOT23-6 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 |
| ADM1070ARTZ-REEL | 功能描述:IC CTRLR HOTSWAP -48V SOT23-6 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 |
| ADM1070ARTZ-REEL7 | 功能描述:IC CTRLR HOTSWAP -48V SOT23-6 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 |
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