LTC3882-1
77
Rev A
MFR_PWM_MODE_LTC3882-1
The MFR_PWM_MODE_LTC3882-1 command sets important PWM controls for each channel. The addressed channel(s)
must be turned off by its RUN pin, OPERATION command, or their combination, when this command is issued. Oth-
erwise the LTC3882-1 will NACK the command byte, ignore the command and its data, and assert a BUSY fault.
When bit 5 is cleared, the LTC3882-1 computes temperature in °C from ∆V
BE
measured by the ADC at the TSNS
n
pin as
T = (G • ∆V
BE
• q/(K • ln(16))) – 273.15 + O
When bit 5 is set, the LTC3882-1 computes temperature in °C from TSNS
n
voltage measured by the ADC as
T = (G • (1.35 – V
TSNS
n
+ O)/4.3e-3) + 25
For both equations,
G = MFR_TEMP_1_GAIN • 2
–14
, and
O = MFR_TEMP_1_OFFSET
Supported Values:
BIT
MEANING
7
Output voltage range select:
0: Maximum V
OUT
= 5.25V.
1: Maximum V
OUT
= 2.65V.
6*
Enable V
OUT
servo.
5
External temperature sense:
0: ∆V
BE
measurement.
1: Direct voltage measurement.
4:3
BOOST refresh width:
11b: 250ns
10b: 125ns
01b: 50ns
00b: 25ns
2
(Reserved).
1
PWM control protocol:
0: 3-State PWM output.
1: 3-State PWM output with no DCM (including soft-start) or hardware ROC response (including OV).
0
PWM mode:
0: Forced continuous inductor current.
1: Discontinuous inductor current.
*This bit is ignored (servo disabled) if MFR_VOUT_AVP for this channel is programmed to a value greater than 0.0%.
This command has one data byte.
PMBus COMMAND DETAILS
(PWM Configuration)
