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LTM4676A Fiches technique(PDF) 98 Page - Linear Technology |
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LTM4676A Fiches technique(HTML) 98 Page - Linear Technology |
98 / 136 page LTM4676A 98 4676afa For more information www.linear.com/LTM4676A appenDix c: pMbus coMManD DeTails IIN_OC_WARN_LIMIT The IIN_OC_WARN_LIMIT command sets the value of the input current, in amperes, that causes a warning indicating the input current is high. The READ_IIN value will be used to determine if this limit has been exceeded. In response to the IIN_OC_WARN_LIMIT being exceeded, the device: • Sets the OTHER bit in the STATUS_BYTE • Sets the INPUT bit in the upper byte of the STATUS_WORD • Sets the IIN Overcurrent Warning bit in the STATUS_INPUT 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. Output Current COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED DATA FORMAT UNITS NVM DEFAULT VALUE IOUT_OC_FAULT_LIMIT 0x46 Output overcurrent fault limit. R/W Word Y L11 A Y 22.84 0xDADB IOUT_OC_WARN_LIMIT 0x4A Output overcurrent warning limit. R/W Word Y L11 A Y 15.59 0xD3E6 IOUT_OC_FAULT_LIMIT The IOUT_OC_FAULT_LIMIT command sets the value of the peak output current limit, in amperes. When the controller is in current limit, the overcurrent detector will indicate an overcurrent fault condition. The programmed overcurrent fault limit value is rounded up to the nearest one of the following set of discrete values: 25mV/IOUT_CAL_GAIN Low Range (1.5x Nominal Loop Gain) MFR_PWM_MODE [7]=0 28.6mV/IOUT_CAL_GAIN 32.1mV/IOUT_CAL_GAIN 35.7mV/IOUT_CAL_GAIN 39.3mV/IOUT_CAL_GAIN 42.9mV/IOUT_CAL_GAIN 46.4mV/IOUT_CAL_GAIN 50mV/IOUT_CAL_GAIN 37.5mV/IOUT_CAL_GAIN High Range (Nominal Loop Gain) MFR_PWM_MODE [7]=1 42.9mV/IOUT_CAL_GAIN 48.2mV/IOUT_CAL_GAIN 53.6mV/IOUT_CAL_GAIN 58.9mV/IOUT_CAL_GAIN 64.3mV/IOUT_CAL_GAIN 69.6mV/IOUT_CAL_GAIN 75mV/IOUT_CAL_GAIN Note: This is the peak of the current waveform. The READ_IOUT command returns the average current. The peak output current limits are adjusted with temperature based on the MFR_IOUT_CAL_GAIN_TC using the equation: IOUT_OC_FAULT_LIMIT = IOUT_CAL_GAIN • (1 + MFR_IOUT_CAL_GAIN_TC • (READ_TEMPERTURE_1-27.0)). |
Numéro de pièce similaire - LTM4676A |
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Description similaire - LTM4676A |
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