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UCD90910RGCR Datasheet(PDF) 10 Page - Texas Instruments

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Part # UCD90910RGCR
Description  10-Rail Sequencer and System Health Monitor With 10-Fan Control
Download  51 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

UCD90910RGCR Datasheet(HTML) 10 Page - Texas Instruments

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UCD90910
SLVSA81 – JULY 2010
www.ti.com
Tach monitor inputs, PWM outputs, and temperature measurements can be combined, with a choice between
two built-in fan-control algorithms to provide a stand-alone fan controller for independent operation of up to ten
fans.
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
UCD90910 can be used to implement accurate closed-loop margining of up to 10 power supplies.
The UCD90910 ten-rail sequencer can be used in a PMBus- or pin-based control environment. The Fusion GUI
provides a powerful but simple interface for configuring sequencing solutions for systems with between one and
ten 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 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 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 and GPIs for Sequence On dependencies
10
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Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s) :UCD90910


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