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参数资料
| 型号： | ADM1275-3ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 32/48页 |
| 文件大小： | 0K |
| 描述： | IC HOT SWAP CTRL PMBUS 20LFCSP |
| 标准包装： | 1 |
| 类型： | 热交换控制器 |
| 应用： | 通用 |
| 内部开关： | 无 |
| 电流限制： | 可调 |
| 电源电压： | 2.95 V ~ 20 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-WQ（5x5） |
| 包装： | 托盘 |
| 配用： | EVAL-ADM1275EBZ-ND - BOARD EVALUATION FOR ADM1275 |
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X = 1/ m × ( Y × 10 ? b ) (2)
ADM1275
PMON_CONTROL Command
Power monitor sampling can be initiated via software or via
hardware, as follows:
? PMON_CONTROL command. This command can be
used with single-shot or continuous mode.
? GPO1/ALERT1/CONV pin. If this pin is configured for
convert mode, an external hardware signal can be used to
take this pin high, triggering the single-shot sampling of
one or more parts together.
READ_VIN, READ_VOUT, and READ_IOUT Commands
The ADM1275 power monitor measures the voltage developed
across the sense resistor to provide a current measurement. On
the ADM1275 -1 and ADM1275 -3, the user can choose to
measure either the input voltage from the SENSE+ pin or the
output voltage present on the VOUT pin. The ADM1275 -2 can
measure only the input voltage from the SENSE+ pin.
PEAK_IOUT, PEAK_VIN, and PEAK_VOUT Commands
In addition to the standard PMBus commands for reading
voltage and current, the ADM1275 provides commands that
can report the maximum peak voltage or current sample since
the peak value was last cleared.
The peak values are updated only after the power monitor has
sampled and averaged the current and voltage measurements.
Individual peak values are cleared by writing a 0 value with the
corresponding command.
WARNING LIMIT SETUP COMMANDS
The ADM1275 power monitor can monitor a number of differ-
ent warning conditions simultaneously and report any current
or voltage values that exceed the user-defined thresholds using
the status commands.
All comparisons performed by the power monitor require the
measured voltage or current value to be strictly greater or less
than the threshold value.
At power-up, all threshold limits are set to either minimum
scale (for undervoltage or undercurrent conditions) or to
maximum scale (for overvoltage or overcurrent conditions).
This effectively disables the generation of any status warnings
by default; warning bits are not set in the status registers until
the user explicitly sets the threshold values.
VIN_OV_WARN_LIMIT and VIN_UV_WARN_LIMIT
Commands
The VIN_OV_WARN_LIMIT and VIN_UV_WARN_LIMIT
commands are used to set the OV and UV thresholds on the
input voltage, as measured at the SENSE+ pin.
VOUT_OV_WARN_LIMIT and VOUT_UV_WARN_LIMIT
Commands
The VOUT_OV_WARN_LIMIT and VOUT_UV_WARN_
Data Sheet
on the output voltage, as measured at the VOUT pin on the
ADM1275 -1 and ADM1275 -3.
IOUT_OC_WARN_LIMIT Command
The IOUT_OC_WARN_LIMIT command is used to set the OC
threshold for the current flowing through the sense resistor.
IOUT_WARN2_LIMIT Command
The IOUT_WARN2_LIMIT command provides a second current
warning threshold that can be programmed. The polarity of this
warning can be set to overcurrent or undercurrent using the
DEVICE_CONFIG command.
PMBus DIRECT FORMAT CONVERSION
The ADM1275 uses the PMBus direct format to represent real-
world quantities such as voltage and current values. A direct
format number takes the form of a 2-byte, twos complement,
binary integer value.
It is possible to convert between direct format value and real-
world quantities using the following equations. Equation 1
converts from real-world quantities to PMBus direct values,
and Equation 2 converts PMBus direct format values to real-
world values.
Y = ( mX + b ) × 10 R (1)
?R
where:
Y is the value in PMBus direct format.
X is the real-world value.
m is the slope coefficient, a 2-byte, twos complement integer.
b is the offset, a 2-byte, twos complement integer.
R is a scaling exponent, a 1-byte, twos complement integer.
The same equations are used for voltage and current conversions,
the only difference being the values of the m, b, and R coefficients
that are used.
current coefficients shown are dependent on the value of the
external sense resistor used in a given application. This means
that an additional calculation must be performed to take the
sense resistor value into account to obtain the coefficients for
a specific sense resistor value.
The sense resistor value used in the calculations to obtain the
coefficients is expressed in milliohms. The m coefficients are
defined as 2-byte twos complement numbers in the PMBus
standard, therefore the maximum positive value that can be
represented is 32767. If the m value is greater than that, and is
to be stored in PMBus standard form, then the m coefficients
should be divided by 10, and the R coefficient increased by a
value of 1. For example, if on the 20 V range, a 10 milliohm
sense resistor is used, the m coefficient is 6043, and the R
coefficient is ?1.
LIMIT commands are used to set the OV and UV thresholds
Rev. D | Page 32 of 48
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相关代理商/技术参数 |
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| ADM1275-3ACPZ-R7 | 功能描述:IC HOT SWAP CTRL PMBUS 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| ADM1275-3ARQZ | 功能描述:IC HOT SWAP CTRL PMBUS 20QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| ADM1275-3ARQZ-R7 | 功能描述:IC HOT SWAP CTRL PMBUS 20QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
| ADM1276 | 制造商:AD 制造商全称:Analog Devices 功能描述:Hot Swap Controller and Digital Power and Energy Monitoring with PMBus Interface |
| ADM1276-3ACPZ | 功能描述:IC HOT SWAP CTRLR PMBUS 20LFCSP RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:119 系列:- 类型:热交换控制器 应用:通用型，PCI Express? 内部开关:无 电流限制:- 电源电压:3.3V，12V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:80-TQFP 供应商设备封装:80-TQFP（12x12） 包装:托盘 产品目录页面:1423 (CN2011-ZH PDF) |
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