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UCD90910RGCR Datasheet(PDF) 11 Page - Texas Instruments |
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UCD90910RGCR Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 51 page  UCD90910 www.ti.com SLVSA81 – JULY 2010 • Rails and GPIs for Sequence Off dependencies • Turn-on and turn-off delay timing • Maximum time allowed for a rail to reach POWER_GOOD_ON or POWER_GOOD_OFF after being enabled or disabled • Other rails to turn off in case of a fault on a rail (fault-shutdown slaves) Figure 4. Fusion GUI Vout-Config Tab The Synchronize margins/limits/PG to Vout checkbox is an easy way to change the nominal operating voltage of a rail and also update all of the other limits associated with that rail according to the percentages shown to the right of each entry. The plot in the upper left section of Figure 4 shows a simulation of the overall sequence-on and sequence-off configuration, including the nominal voltage, the turn-on and turn-off delay times, the power-good on and power-good off voltages and any timing dependencies between the rails. After a rail voltage has reached its POWER_GOOD_ON voltage and is considered to be in regulation, it is compared against two UV and two OV thresholds in order to determine if a warning or fault limit has been exceeded. If a fault is detected, the UCD90910 responds based on a variety of flexible, user-configured options. Faults can cause rails to restart, shut down immediately, sequence off using turn-off delay times, or shut down a group of rails and sequence them back on. Different types of faults can result in different responses. Fault responses, along with a number of other parameters including user-specific manufacturing information and external scaling and offset values, are selected in the different tabs within the Configure funciton of the Fusion GUI. Once the configuration satisfies the user requirements, it can be written to device SRAM if Fusion GUI is connected to a UCD90910 using an I2C/PMBus. SRAM contents can then be stored to data flash memory so that the configuration remains in the device after a reset or power cycle. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s) :UCD90910 |
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