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参数资料
| 型号： | LM25066APSQE |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, QCC24 |
| 封装： | LLP-24 |
| 文件页数： | 36/48页 |
| 文件大小： | 1658K |
| 代理商： | LM25066APSQE |
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Reading Input and Output Voltage
Coefficients for VIN and VOUT are fixed and are consistent
between read telemetry measurements (e.g., READ_VIN,
READ_AVG_VIN)
and
warning
thresholds
(e.g.,
VIN_UV_WARN_LIMIT). Input and output voltage values are
read/written in Direct format with 12-bit resolution and a 4.54
mV LSB. An example of calculating the PMBus coefficients
for input voltage is shown below.
Step
Example
1. Determine m' based on full scale analog input and full scale
digital range:
2. Determine exponent R necessary to set m' to integer value m
with desired accuracy:
Select R to provide 5 digit accuracy for the integer value of m
(which would be 21703 in this example:
R = -2
3. Final values
m = 22026
R = -2
b =0
Reading Power
The power calculation of the LM25066A is a relative power
calculation meaning that full scale of the power register cor-
responds to simultaneous full scale values in the current
register and voltage register such that the power register has
the following relationship based on decimal equivalents of the
register contents:
For this reason power coefficients will also vary depending on
the shunt value and must be calculated for each application.
The power LSB will vary depending on shunt value according
to 276 W/Rsense for 46mV range or 138.2 W/Rsense for
25mV range.
Step
Example
1. Determine full scale power from known full scale of input
current and input voltage
P
IN_MAX = VIN_MAX x IIN_MAX
Example: 125A application with 250
shunt.
P
IN_MAX = (18.59V) x (120.8A) = 2246W
2. Determine m':
3. Optional: Determine exponent R necessary to set m' to integer
value m with desired accuracy:
Select R (in this case selected to provide 4 digit accuracy for the
integer value of m):
R = -3
4. Final values
m = 1823
R = -3
b = 0
41
www.national.com
LM25066A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM25066APSQE/NOPB | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| LM25066APSQX | 制造商:TI 制造商全称:Texas Instruments 功能描述:System Power Management and Protection IC with PMBusa?￠ |
| LM25066APSQX/NOPB | 功能描述:热插拔功率分布 RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| LM25066EVK/NOPB | 功能描述:电源管理IC开发工具 LM25066 EVAL BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| LM25066IAPSQ/NOPB | 制造商:Texas Instruments 功能描述:IC PWR MGMT/PROT PMBUS 24WQFN 制造商:Texas Instruments 功能描述:System PWR Mgmt & Protection IC |
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