Maxim-integrated MAX15301 PMBus Command Set Manual de usuario Pagina 34
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MAX15301 PMBus Command Set User’s Guide
Rev 1 Page 34 of 53
Calibration Commands
IOUT_CAL_GAIN
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x38
Format:
Linear
Data Bytes:
2
Units:
mΩ
Transfer:
Read/Write Word
Factory Value:
0xB200 (see Description)
Description/Notes:
See Section 14.8 of the PMBus Specification Part II.
The differential voltage measured between the DCRP and DCRN pins is divided by the value of
IOUT_CAL_GAIN and the value of IOUT_CAL_OFFSET
is subtracted to provide a load current signal,
accessible through the READ_IOUT command.
The factory value of 0xB200 (0.5mΩ) will be overridden during initialization by the hardware (pin-
strap) value determined by the resistances to ground detected at the ADDR1 pin, unless a specific
value of IOUT_CAL_GAIN has been written to the User Store. The value of the ADDR1 pin resistance is
measured only once during initialization (power-up).
The value of IOUT_CAL_GAIN is internally temperature compensated according to
READ_TEMPERATURE_2 and EXT_TEMP_CAL.
Wait at least 500μs for execution after sending the IOUT_CAL_GAIN command before sending
additional PMBus commands.
IOUT_CAL_OFFSET
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x39
Format:
Linear
Data Bytes:
2
Units:
A
Transfer:
Read/Write Word
Factory Value:
0x0000 (0A)
Description/Notes:
See Section 14.9 of the PMBus Specification Part II.
The differential voltage measured between the DCRP and DCRN pins is divided by the value of
IOUT_CAL_GAIN
and the value of IOUT_CAL_OFFSET is subtracted to provide a load current signal,
accessible through the READ_IOUT command.
Note that the MAX15301 implementation of IOUT_CAL_OFFSET differs from the PMBus specification
because the sign of IOUT_CAL_OFFSET is inverted (i.e., IOUT_CAL_OFFSET is subtracted rather than
added.)
EXT_TEMP_CAL (MAX15301AA01)
Reference:
Maxim Specific
Lockable:
Yes
Command Code:
0xF8
Format:
Linear
Data Bytes:
4
Units:
Scalar, °K
Transfer:
Read/Write Block
Factory Value:
0xBA02 (1.004363), 0x0000 (0°K)
Description/Notes:
The EXT_TEMP_CAL command allows the user to calibrate the READ_TEMPERATURE_2 data and to
adjust for different temperature-sense diode junction ideality factors.
- MAX15301 PMBus Command Set 1
- User’s Guide 1
- Introduction 2
- Part Number Differences 2
- Table of Contents 3
- Rev 1 Page 6 of 53 6
- OPERATION 7
- ON_OFF_CONFIG 7
- VIN_OFF 9
- VOUT_MODE 10
- VOUT_COMMAND 10
- VOUT_TRIM 10
- VOUT_CAL_OFFSET 11
- VOUT_MAX 11
- VOUT_MARGIN_HIGH 11
- VOUT_MARGIN_LOW 12
- VOUT_TRANSITION_RATE 13
- VOUT_DROOP 13
- FREQUENCY_SWITCH 15
- INTERLEAVE 15
- POWER_GOOD_ON 16
- POWER_GOOD_OFF 17
- TON_DELAY 17
- TON_RISE 18
- TOFF_DELAY 18
- TOFF_FALL 19
- Fault Related Commands 20
- VOUT_OV_FAULT_RESPONSE 21
- VOUT_UV_FAULT_LIMIT 21
- VOUT_UV_FAULT_RESPONSE 22
- IOUT_OC_FAULT_LIMIT 22
- IOUT_OC_FAULT_RESPONSE 23
- OT_FAULT_LIMIT 23
- OT_FAULT_RESPONSE 24
- OT_WARN_LIMIT 25
- VIN_OV_FAULT_LIMIT 25
- VIN_OV_FAULT_RESPONSE 25
- VIN_UV_FAULT_LIMIT 26
- VIN_UV_FAULT_RESPONSE 26
- Unit Status Commands 28
- STATUS_INPUT 29
- STATUS_TEMPERATURE 29
- STATUS_CML 29
- Telemetry Commands 30
- READ_TEMPERATURE_1 31
- READ_TEMPERATURE_2 31
- READ_DUTY_CYCLE 31
- READ_FREQUENCY 32
- PMB_VALUES 32
- Calibration Commands 34
- EXT_TEMP_CAL (MAX15301AA01) 35
- EXT_TEMP_CAL (MAX15301AA02) 35
- CAPABILITY 36
- PMBUS_REVISION 36
- MFR_MODEL 37
- MFR_REVISION 37
- MFR_LOCATION 37
- MFR_DATE 37
- MFR_SERIAL 38
- IC_DEVICE_ID (MAX15301AA01) 38
- IC_DEVICE_ID (MAX15301AA02) 38
- IC_DEVICE_REV 38
- Security Commands 39
- MANUF_LOCK 40
- MANUF_PASSWD 40
- USER_CONF 40
- USER_LOCK 41
- USER_PASSWD 41
- SECURITY_LEVEL 42
- Memory and Storage Commands 43
- STORE_DEFAULT_ALL 44
- RESTORE_DEFAULT_ALL 44
- STORE_USER_ALL 44
- RESTORE_USER_ALL 46
- RESTORE_MAXIM_ALL 46
- STRAP_DISABLE 47
- Control Loop Commands 48
- FEEDBACK_EFFORT 49
- LOOP_CONFIG 49
- COMP_MODEL 50
- DEADTIME_GCTRL 50
- Trademarks 53
- Revision History 53
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