ADM1281中文資料亞德諾數據手冊PDF規(guī)格書
ADM1281規(guī)格書詳情
GENERAL DESCRIPTION
The ADM1281 is a hot-swap controller that allows a circuit board
to be removed from or inserted into a live backplane. It also
features current, voltage, power, and temperature readback through
an integrated 12-bit analog-to-digital converter (ADC), accessed
using a PMBus? interface. The load current is measured using an
internal current sense amplifier that measures the voltage across a
sense resistor in the power path through the HS+ and HS? pins. A
default current limit of 20 mV is set, but this limit can be adjusted, if
required.
The ADM1281 limits the current through the sense resistor by controlling
the gate voltage of an external N-channel FET in the power
path, through the GATE pin. The sense voltage, and therefore
the load current, is maintained below the preset maximum. The
ADM1281 protects the external FET by limiting the time that the
FET remains on while the current is at its maximum value. This
current-limit time is set by the choice of capacitor connected to the
TIMER pin. In addition, a constant power foldback scheme is used
to control the power dissipation in the MOSFET during power-up
and fault conditions. The level of this power, along with the TIMER
regulation time, can be set to ensure that the MOSFET remains
within safe operating area (SOA) limits.
In case of a short-circuit event, a fast internal overcurrent detector
responds within 290 ns and signals the gate to shut down. A 2400
mA pull-down device ensures a fast FET response.
The ADM1281 features overvoltage (OV) and undervoltage (UV)
protection, programmed using external resistor dividers on the UV
and OV pins. A PWRGD signal can be used to detect when the
output supply is valid, using the PWGIN pin to accurately monitor
the output.
The ADM1281 is available in a 32-lead LFCSP with a RETRY pin
that can be configured for automatic retry or latch-off when an
overcurrent fault occurs.
FEATURES
? Drop-in replacement to ADM1278
? ±0.3% accurate, 12-bit ADC for IOUT, VIN, VOUT, and temperature
? 290 ns response time to short-circuit
? Shutdown on detection of FET health fault
? Constant power foldback for tighter FET SOA protection
? Remote temperature sensing with programmable warning and
shutdown thresholds
? Resistor-programmable 5 mV to 25 mV VSENSE current limit
? Programmable start-up current limit
? 1% accurate UV, OV, and PWRGD thresholds
? Split hot-swap and power monitor inputs to allow additional
external ADC filtering
? Reports power and energy consumption over time
? Peak detect registers for current, voltage, and power
? PROCHOT power throttling capability
? PMBus fast mode compliant interface
? Available in 5 mm × 5 mm, 32-lead LFCSP package
APPLICATIONS
? Servers
? Power monitoring and control/power budgeting
? Telecommunication and data communication equipment
供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
---|---|---|---|---|---|---|---|
ADI |
2020+ |
QSOP16 |
15000 |
只做自己庫存,全新原裝進口正品假一賠百,可開13%增 |
詢價 | ||
ADI |
20+ |
NA |
33680 |
ADI全新原裝-可開原型號增稅票 |
詢價 | ||
ADI |
2229+ |
QSOP16 |
11206 |
一級代理/分銷渠道價格優(yōu)勢 十年芯程一路只做原裝正品 |
詢價 | ||
ADI |
23+ |
N/A |
8000 |
專注配單,只做原裝進口現貨 |
詢價 | ||
ADI |
24+ |
16-Lead QSOP |
3660 |
十年信譽,只做全新原裝正品現貨,以優(yōu)勢說話 !! |
詢價 | ||
ADI |
22+ |
QSOP |
6500 |
只做原裝正品假一賠十!正規(guī)渠道訂貨! |
詢價 | ||
ADI |
21+ |
標準封裝 |
4202 |
進口原裝,訂貨渠道! |
詢價 | ||
ADI/亞德諾 |
21+ |
原封裝 |
13880 |
公司只售原裝,支持實單 |
詢價 | ||
ADI(亞德諾)/LINEAR |
2021+ |
QSOP-16 |
499 |
詢價 | |||
AnalogDevicesInc. |
23+ |
16-QSOP |
66800 |
原廠授權一級代理,專注汽車、醫(yī)療、工業(yè)、新能源! |
詢價 |