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UCD90160 Datasheet(PDF) 9 Page - Texas Instruments |
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UCD90160 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 41 page UCD90160 www.ti.com SLVSAC8A – NOVEMBER 2010 – REVISED APRIL 2011 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 UCD90160 can be used to implement accurate closed-loop margining of up to 10 power supplies. The UCD90160 16-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 16 power supplies using 16 analog voltage-monitor inputs, four GPIs and 22 highly configurable GPIOs. A rail includes voltage, 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 4). Figure 4. Fusion GUI 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 5): • 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 and GPIs for Sequence On dependencies • Rails and GPIs for Sequence Off dependencies • Turn-on and turn-off delay timing Copyright © 2010–2011, Texas Instruments Incorporated 9 |
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