參數(shù)資料
型號(hào)： LM25066APSQE
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 電源管理
英文描述： POWER SUPPLY SUPPORT CKT, QCC24
封裝： LLP-24
文件頁數(shù)： 24/48頁
文件大小： 1658K
代理商： LM25066APSQE
TABLE 7. VIN_OV_WARN_LIMIT Register
Value
Meaning
Default
0h – 0FFEh
VIN Over-voltage
Warning detection
threshold
0FFFh (disabled)
0FFFh
VIN Over-voltage
Warning disabled
n/a
VIN_UV_WARN_LIMIT (58h)
The VIN_UV_WARN_LIMIT command is a standard PM-
Bus command that allows configuring or reading the thresh-
old for the VIN under-voltage warning detection. Reading and
writing to this register should use the coefficients shown in the
Telemetry and Warning Conversion Coefficients Table. Ac-
cesses to this command should use the PMBus read or
write word protocol. If the measured value of VIN falls below
the value in this register, VIN UV Warn flags are set in the
respective registers, and the SMBA signal is asserted.
TABLE 8. VIN_UV_WARN_LIMIT Register
Value
Meaning
Default
1h – 0FFFh
VIN Under-voltage
Warning detection
threshold
0000h (disabled)
0000h
VIN Under-voltage
Warning disabled
n/a
STATUS_BYTE (78h)
The STATUS_BYTE is a standard PMBus command that
returns the value of a number of flags indicating the state of
the LM25066A. Accesses to this command should use the
PMBus read byte protocol. To clear bits in this register, the
underlying fault should be removed and a CLEAR_FAULTS
command issued.
TABLE 9. STATUS_BYTE Definitions
Bit
NAME
Meaning
Default
7
BUSY
Not Supported, always 0
0
6
OFF
This bit is asserted if the MOSFET is not switched on
for any reason.
1
5
VOUT OV
Not Supported, always 0
0
4
IOUT OC
Not Supported, always 0
0
3
VIN UV FAULT
A VIN Under-voltage Fault has occurred
1
2
TEMPERATURE
A Temperature Fault or Warning has occurred
0
1
CML
A Communication Fault has occurred
0
None of the Above
A fault or warning not listed in bits [7:1] has occurred
1
STATUS_WORD (79h)
The STATUS_WORD command is a standard PMBus com-
mand that returns the value of a number of flags indicating the
state of the LM25066A. Accesses to this command should
use the PMBus read word protocol. To clear bits in this
register, the underlying fault should be removed and a
CLEAR_FAULTS command issued. The INPUT and VIN UV
FAULT flags will default to 1 on startup. However, they will be
cleared to 0 after the first time the input voltage exceeds the
resistor programmed UVLO threshold.
TABLE 10. STATUS_WORD Definitions
Bit
NAME
Meaning
Default
15
VOUT
An output voltage fault or warning has occurred
0
14
IOUT/POUT
Not Supported, always 0
0
13
INPUT
An input voltage or current fault has occurred
1
12
MFR
A Manufacturer Specific Fault or Warning has occurred
1
11
POWER GOOD
The Power Good signal has been negated
1
10
FANS
Not Supported, always 0
0
9
OTHER
Not Supported, always 0
0
8
UNKNOWN
Not Supported, always 0
0
7
BUSY
Not Supported, always 0
0
6
OFF
This bit is asserted if the MOSFET is not switched on for
any reason.
1
5
VOUT OV
Not Supported, always 0
0
4
IOUT OC
Not Supported, always 0
0
3
VIN UV FAULT
A VIN Under-voltage Fault has occurred
1
2
TEMPERATURE
A Temperature Fault or Warning has occurred
0
1
CML
A Communication Fault has occurred
0
None of the Above
A fault or warning not listed in bits [7:1] has occurred
1
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LM25066A
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