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UCD90124RGCR Datasheet(PDF) 9 Page - Texas Instruments |
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UCD90124RGCR Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 46 page  UCD90124 www.ti.com SLVSA29A – NOVEMBER 2009 – REVISED DECEMBER 2009 System reliability can be improved through four-corner testing during system verification. During four-corner testing, the system is operated at the minimum and maximum expected ambient temperature and with each power supply set to the minimum and maximum output voltage, commonly referred to as margining. The UCD90124 can be used to implement accurate closed-loop margining of up to 10 power supplies. The UCD90124 12-rail sequencer can be used in a PMBus- or pin-based control environment. The TI Fusion GUI provides a powerful but simple interface for configuring sequencing solutions for systems with between one and 12 power supplies using 13 analog voltage-monitor inputs, four GPIs and 22 highly configurable GPIOs. A rail can include voltage, temperature, current, a power-supply enable and a margining output. At least one must be included in a rail definition. Once the user has defined how the power-supply rails should operate in a particular system, analog input pins and GPIOs can be selected to monitor and enable each supply (Figure 3). Figure 3. Fusion Pin-Assignment Tab After the pins have been configured, other key monitoring and sequencing criteria are selected for each rail from the Vout Config tab (Figure 4): • Nominal operating voltage (Vout) • Undervoltage (UV) and overvoltage (OV) warning and fault limits • Margin-low and margin-high values • Power-good on and power-good off limits • PMBus or pin-based sequencing control (On/Off Config) • Rails that must achieve power good, or input pins that must be at a defined logic state before a rail is enabled (rail and input-pin dependencies) • Turnon and turnoff 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) Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s) :UCD90124 |
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