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LTM4686BEVPBF 数据表(PDF) 96 Page - Analog Devices |
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LTM4686BEVPBF 数据表(HTML) 96 Page - Analog Devices |
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96 / 130 page  LTM4686B 96 Rev. 0 For more information www.analog.com APPENDIX C: PMBUS COMMAND DETAILS OT_FAULT_LIMIT The OT_FAULT_LIMIT command sets the value of the power stage temperature, in degrees Celsius, which causes an overtemperature fault. The READ_TEMPERATURE_1 value will be used to determine if this limit has been exceeded. This condition is detected by the ADC so the response time may be up to 90ms, typical. This command has two data bytes and is formatted in Linear_5s_11s format. OT_WARN_LIMIT The OT_WARN_LIMIT command sets the value of the power stage temperature, in degrees Celsius, which causes an overtemperature warning. The READ_TEMPERATURE_1 value will be used to determine if this limit has been exceeded. In response to the OT_WARN_LIMIT being exceeded, the device: • Sets the TEMPERATURE bit in the STATUS_BYTE • Sets the Overtemperature Warning bit in the STATUS_TEMPERATURE command, and • Notifies the host by asserting ALERT pin, unless masked. This condition is detected by the ADC so the response time may be up to 90ms, typical. This command has two data bytes and is formatted in Linear_5s_11s format. UT_FAULT_LIMIT The UT_FAULT_LIMIT command sets the value of the power stage temperature, in degrees Celsius, which causes an undertemperature fault. The READ_TEMPERATURE_1 value will be used to determine if this limit has been exceeded. This condition is detected by the ADC so the response time may be up to 90ms, typical. This command has two data bytes and is formatted in Linear_5s_11s format. TIMING Timing: On Sequence/Ramp COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE TON_DELAY 0x60 Time from RUN and/or Operation on to output rail turn-on. R/W Word Y L11 ms Y 0.0 0x0000 TON_RISE 0x61 Time from when the output starts to rise until the output voltage reaches the VOUT commanded value. R/W Word Y L11 ms Y 2.0 0xC200 TON_MAX_FAULT_LIMIT 0x62 Maximum time from the start of TON_RISE for VOUT to cross the VOUT_UV_FAULT_LIMIT. R/W Word Y L11 ms Y 10 0xD280 VOUT_TRANSITION_RATE 0x27 Rate the output changes when VOUT commanded to a new value. R/W Word Y L11 V/ms Y 0.025 0x8B33 |
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