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参数资料
| 型号： | LM25066APSQX |
| 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： | 30/48页 |
| 文件大小： | 1658K |
| 代理商： | LM25066APSQX |
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MFR_SPECIFIC_10: BLOCK_READ (DAh)
The
BLOCK_READ
command
concatenates
the
DIAGNOSTIC_WORD with input and output telemetry infor-
mation (IIN, VOUT, VIN, PIN) as well as TEMPERATURE to
capture all of the operating information of the LM25066A in a
single SMBus transaction. The block is 12 bytes long with
telemetry information being sent out in the same manner as
if an individual READ_XXX command had been issued
(shown below). The contents of the block read register are
updated every clock cycle (85ns) as long as the SMBus in-
terface is idle. BLOCK_READ also guarantees that the VIN,
VOUT, IIN and PIN measurements are all time-aligned
whereas there is a chance they may not be if read with indi-
vidual PMBus commands.
The Block Read command is read via the PMBus block
read protocol.
TABLE 31. BLOCK_READ Register Format
Byte Count (always 12)
(1 byte)
DIAGNOSTIC_WORD
(1 Word)
IIN_BLOCK
(1 Word)
VOUT_BLOCK
(1 Word)
VIN_BLOCK
(1 Word)
PIN_BLOCK
(1 Word)
TEMP_BLOCK
(1 Word)
MFR_SPECIFIC_11: SAMPLES_FOR_AVG (DBh)
The SAMPLES_FOR_AVG command is a manufacturer spe-
cific command for setting the number of samples used in
computing the average values for IIN, VIN, VOUT, PIN. The
decimal equivalent of the AVGN nibble is the power of 2 sam-
ples (e.g. AVGN=12 equates to 4096 samples used in com-
puting the average). The LM25066A supports average
numbers of 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048,
4096. The SAMPLES_FOR_AVG number applies to average
values of IIN, VIN, VOUT, PIN simultaneously. The
LM25066A uses simple averaging. This is accomplished by
summing consecutive results up to the number programmed,
then dividing by the number of samples. Averaging is calcu-
lated according to the following sequence:
Y = (X
(N) + X(N-1) + ... + X(0)) / 2
AVGN
When the averaging has reached the end of a sequence (for
example, 4096 samples are averaged), then a whole new se-
quence begins that will require the same number of samples
(in this example, 4096) to be taken before the new average is
ready.
TABLE 32. SAMPLES_FOR_AVG Register
AVGN
N=2N averages
Averaging/Register
Update Period (ms)
0000
1
0001
2
0010
4
0011
8
0100
16
0101
32
0110
64
0111
128
1000
256
AVGN
N=2N averages
Averaging/Register
Update Period (ms)
1001
512
1010
1024
1011
2048
1100
4096
Note that a change in the SAMPLES_FOR_AVG register will
not be reflected in the average telemetry measurements until
the present averaging interval has completed. The default
setting for AVGN is 0000 and therefore the average telemetry
will mirror the instantaneous telemetry until a value higher
than zero is programmed.
The SAMPLES_FOR_AVG register is accessed via the PM-
Bus read / write byte protocol.
TABLE 33. SAMPLES_FOR_AVG Register
Value
Meaning
Default
0h – 0Ch
Exponent (AVGN)
for number of
samples to
average over
00h
MFR_SPECIFIC_12: READ_AVG_VIN (DCh)
The READ_AVG_VIN command will report the 12-bit ADC
measured input average voltage. If the data is not ready, the
returned value will be the previous averaged data. However,
if there is no previously averaged data, the default value
(0000h) will be returned. This data is read with the PMBus
Read Word protocol. This register should use the coefficients
shown in the Telemetry and Warning Conversion Coefficients
Table.
TABLE 34. READ_AVG_VIN Register
Value
Meaning
Default
0h – 0FFFh
Average of
measured values
for input voltage
0000h
MFR_SPECIFIC_13: READ_AVG_VOUT (DDh)
The READ_AVG_VOUT command will report the 12-bit ADC
measured average output voltage. The returned value will be
the default value (0000h) or previous data when the average
data is not ready. This data is read with the PMBus Read
Word protocol. This register should use the coefficients
shown in the Telemetry and Warning Conversion Coefficients
Table.
TABLE 35. READ_AVG_VOUT Register
Value
Meaning
Default
0h – 0FFFh
Average of
measured values
for output voltage
0000h
MFR_SPECIFIC_14: READ_AVG_IIN (DEh)
The READ_AVG_IIN command will report the 12-bit ADC
measured current sense average voltage. The returned value
will be the default value (0000h) or previous data when the
average data is not ready. This data is read with the PMBus
Read Word protocol. This register should use the coefficients
www.national.com
36
LM25066A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LM25066IAPSQE/NOPB | 功能描述:热插拔功率分布 System PWR Mgmt & Protection IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制:45 mA 电源电压-最大:17 V 电源电压-最小:2.9 V 工作温度范围:- 40 C to + 85 C 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:WQFN-24 封装:Reel |
| LM25066IAPSQX/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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