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LTM4650 データシート(PDF) 95 Page - Analog Devices

部品番号 LTM4650
部品情報  30V to 58V Input, Dual 30A, Single 60A 關Module Regulator with Digital Power System Management
PDF  138 Pages
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ホームページ  http://www.analog.com
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LTM4650 データシート(HTML) 95 Page - Analog Devices

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LTM4664A
95
Rev. 0
For more information www.analog.com
PMBus COMMAND DETAILS
PWM CONFIGURATION
COMMAND NAME
CMD CODE DESCRIPTION
TYPE
PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
MFR_PWM_COMP
0xD3
PWM loop compensation configuration
R/W Byte
Y
Reg
Y
0x28
MFR_PWM_MODE
0xD4
Configuration for the PWM engine.
R/W Byte
Y
Reg
Y
0xC7
MFR_PWM_CONFIG
0xF5
Set numerous parameters for the DC/DC controller
including phasing.
R/W Byte
N
Reg
Y
0x10
FREQUENCY_SWITCH
0x33
Switching frequency of the controller.
R/W
Word
N
L11
kHz
Y
350kHz
0xFABC
MFR_PWM_MODE
The MFR_PWM_MODE command sets important PWM controls for each channel.
The MFR_PWM_MODE command allows the user to program the PWM controller to use discontinuous (pulse-skipping
mode), or forced continuous conduction mode.
BIT
MEANING
7
0b
1b
Use High Range of ILIMIT
Low Current Range
High Current Range
6
Enable Servo Mode
5
External temperature sense:
0: ΔVBE measurement.
Now reserved, ΔVBE only supported.
[4:3]
Reserved
2
Reserved, always low DCR current sense
1
1b
0b
VOUT Range
The maximum output voltage is 2.75V
The maximum output voltage is 3.6V
Bit[0]
0b
1b
Mode
Discontinuous
Forced Continuous
Bit [7] of this command determines if the part is in high range or low range of the IOUT_OC_FAULT_LIMIT command.
Changing this bit value changes the PWM loop gain and compensation. This bit value should not be changed when the
channel output is active. Writing this bit when the channel is active will generate a CML fault.
Bit [6] The LTM4664A PSM will not servo while the part is OFF, ramping on or ramping off. When set to a one, the
output servo is enabled. The output set point DAC will be slowly adjusted to minimize the difference between the
READ_VOUT_ADC and the VOUT_COMMAND (or the appropriate margined value).
The LTM4664A PSM computes temperature in °C from ∆VBE measured by the ADC at the TSNSn pin as
T = (G • ΔVBE • q/(K • ln(16))) – 273.15 + O



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