Manual

MAX15301 PMBus Command Set User’s Guide
Rev 1 Page 20 of 53
Fault Related Commands
CLEAR_FAULTS
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x03
Format:
N/A
Data Bytes:
0
Units:
N/A
Transfer:
Send Byte
Factory Value:
N/A
Description/Notes:
See Section 15.1 of the PMBus Specification Part II.
If the MAX15301 has latched off for a fault condition, sending the CLEAR_FAULTS command will cause
a restart.
VOUT_OV_FAULT_LIMIT
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x40
Format:
Unsigned integer mantissa
Data Bytes:
2
Units:
V
Transfer:
Read/Write Word
Factory Value:
0x0025 (see Description)
Description/Notes:
See Section 15.2 of the PMBus Specification Part II.
VOUT_OV_FAULT_LIMIT mantissa data sent to and from the MAX15301 must be divided by 4096 to
determine the actual voltage value, according to the fixed value of VOUT_MODE
.
In the MAX15301, there are seven possible output voltage ranges based on seven corresponding
internal feedback divider taps. The MAX15301 hardware has 8-bit resolution for the overvoltage fault
limit within each of these seven ranges.
The desired value of VOUT_OV_FAULT_LIMIT is retained in memory, regardless of limitations
imposed by the feedback divider range and the 8-bit fault limit resolution, but the read-back value is
based on actual hardware register settings.
The factory value of 0x0025 (9mV)
will be overridden during initialization to
VOUT_COMMAND x 1.15, unless a specific value has been written to the User Store.