Datasheet > ADM1275-3ARQZ-R7

ADM1275-3ARQZ-R7

更新时间： 2024-11-23 12:36:11

品牌	Logo	应用领域
亚德诺 - ADI		控制器
页数	文件大小	规格书
48页	741K
描述
Hot-Swap Controller and Digital Power

阅读下载

中文翻译

获取价格

数据手册
替代型号

如果您发现信息不准确，欢迎纠错

ADM1275-3ARQZ-R7 数据手册

Hot-Swap Controller and Digital Power

Monitor with PMBus Interface

Data Sheet

ADM1275

FEATURES

APPLICATIONS DIAGRAM

SENSE

2V TO 20V

Controls supply voltages from 2 V to 20 V

370 ns response time to short circuit

SENSE+

SENSE–

2.95V

20V

VCC

–

Resistor-programmable 5 mV to 25 mV current limit

1% accurate, 12-bit ADC for current, V_IN/V_OUTreadback

Charge-pumped gate drive for multiple external N-channel FETs

High gate drive voltage to ensure lowest R_DSON

Foldback for tighter FET SOA protection

Automatic retry or latch-off on current fault

Programmable current limit timer for SOA

Programmable, multifunction GPOs

Power-good status output

Analog UV and OV protection

ENABLE pin (ADM1275-3 only)

Peak detect registers for current and voltage

PMBus fast mode compliant interface

ADM1275-1

×50

CHARGE

PUMP

VCAP

LDO

IOUT

GATE

DRIVE/

LOGIC

1.0V

–

GATE

VOUT

–

TIMEOUT

CURRENT

1.0V

–

ISET

REF

SELECT

LIMIT

TIMER

1.0V

CURRENT

LIMIT

CONTROL

CBOS

TIMER

FLB

TIMER

PWRGD

TIMEOUT

GPO1/ALERT1/CONV

GPO2/ALERT2

LATCH

SCL

LOGIC

AND

PMBus

SENSE+

VOUT

IOUT

12-BIT

ADC

SDA

ADR

16-lead QSOP and 20-lead QSOP and LFCSP

GND

APPLICATIONS

Figure 1.

Power monitoring and control/power budgeting

Central office equipment

Telecommunication and data communication equipment

PCs/servers

GENERAL DESCRIPTION

The ADM1275 is a hot-swap controller that allows a circuit board

to be removed from or inserted into a live backplane. It also features

current and voltage readback via an integrated 12-bit analog-to-

digital converter (ADC), accessed using a PMBus™ interface.

In case of a short-circuit event, a fast internal overcurrent detec-

tor responds within 370 ns and signals the gate to shut down. A

1500 mA pull-down device ensures a fast FET response. The

ADM1275 features overvoltage and undervoltage 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 FLB pin to monitor the output. GPO

pins can be configured as various output signals that can be

asserted when a programmed current or voltage level is reached.

The load current is measured using an internal current sense

amplifier that measures the voltage across a sense resistor in

the power path via the SENSE+ and SENSE− pins. A default

limit of 20 mV is set, but this limit can be adjusted, if required,

using a resistor divider network from the internal reference

voltage to the ISET pin.

The 12-bit ADC can measure the current in the sense resistor,

as well as the supply voltage on the SENSE+ pin or the output

voltage. A PMBus interface allows a controller to read current

and voltage data from the ADC. Measurements can be initiated

by a PMBus command. Alternatively, the ADC can run continu-

ously, and the user can read the latest conversion data whenever

required. Up to four unique PMBus addresses can be selected,

depending on the way that the ADR pin is connected.

The ADM1275 limits the current through the sense resistor by

controlling the gate voltage of an external N-channel FET in the

power path, via the GATE pin. The sense voltage—and, therefore,

the load current—is maintained below the preset maximum. The

ADM1275 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 foldback resistor network can be

used to actively lower the current limit as the voltage across the

FET is increased. This helps to maintain constant power in the

FET and allows the safe operating area (SOA) to be adhered to

in an effective manner.

The ADM1275-1 and ADM1275-3 are available in a 20-lead QSOP

LATCH

and 20-lead LFCSP and have a

pin that can be configured

for automatic retry or latch-off when an overcurrent fault occurs.

The ADM1275-2 is available in a 16-lead QSOP with latch-off

mode only.

Rev. D

Document Feedback

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. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

12 3 4 5 6 7...48

中文翻译

下载PDF

ADM1275-3ARQZ-R7 替代型号

型号	品牌	替代类型	描述	数据表
ADM1275-3ARQZ	ADI	完全替代	Hot-Swap Controller and Digital Power

与ADM1275-3ARQZ-R7相关器件

型号	品牌	获取价格	描述	数据表
ADM1276	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitoring with PMBus Interface
ADM1276-3ACPZ	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitoring with PMBus Interface
ADM1276-3ACPZ-RL	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitoring with PMBus Interface
ADM1278	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-1AACPZ	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-1ACPZ	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-1ACPZ-RL	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-1BCPZ	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-1BCPZ-RL	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface
ADM1278-2ACPZ	ADI	获取价格	Hot Swap Controller and Digital Power and Energy Monitor with PMBus Interface

与ADM1275-3ARQZ-R7相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

36
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

28
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

56
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

53

产品中心

服务支持

精选活动

关于我们

帮助中心

ADM1275-3ARQZ-R7

ADM1275-3ARQZ-R7 数据手册

ADM1275-3ARQZ-R7 替代型号

与ADM1275-3ARQZ-R7相关器件

与ADM1275-3ARQZ-R7相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

ADM1275-3ARQZ-R7

ADM1275-3ARQZ-R7 数据手册

ADM1275-3ARQZ-R7 替代型号

与ADM1275-3ARQZ-R7相关器件

与ADM1275-3ARQZ-R7相关文章

您还可以找

您在本页遇到什么问题？