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Product details

Parameters

Number of supplies monitored 13 Iq (Typ) (uA) 50000 Time delay (ms) Programmable Number of sequenced outputs 12 Rating Catalog open-in-new Find other Sequencers

Package | Pins | Size

VQFN (RGC) 64 81 mm² 9 x 9 open-in-new Find other Sequencers

Features

  • Monitor and Sequence 12 Voltage Rails
    • All Rails Sampled Every 400 µs
    • 12-bit ADC With 2.5-V, 0.5% Internal VREF
    • Sequence Based on Time, Rail and Pin Dependencies
    • Four Programmable Undervoltage and Overvoltage
      Thresholds per Monitor
  • Fan Control and Monitoring
    • Supports Four Fans With Five User-Defined
      Speed-vs-Temperature Setpoints
    • Supports Two-, Three-, and Four-Wire Fans
  • Nonvolatile Error and Peak-Value Logging per Monitor
    (up to 10 Fault Detail Entries)
  • Closed-Loop Margining for 10 Rails
    • Margin Output Adjusts Rail Voltage to Match
      User-Defined Margin Thresholds
  • Programmable Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • Multiphase PWM Clock Generator
    • Clock Frequencies From 15.259 kHz to 125 MHz
    • Capability to Configure Independent Clock Outputs for
      Synchronizing Switch-Mode Power Supplies
  • Internal Temperature Sensor
  • JTAG and I2C/SMBus/PMBus™ Interfaces
  • APPLICATIONS
    • Industrial / ATE
    • Telecommunications and Networking Equipment
    • Servers and Storage Systems
    • Embedded Computing
    • Any System Requiring Sequencing and Monitoring of
      Multiple Power Rails

PMBus, Fusion Digital Power are trademarks of Texas Instruments.

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Description

The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and system-health monitor. The device integrates a 12-bit ADC for monitoring up to 13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Twelve of these pins offer PWM functionality. Using these pins, the UCD90124 offers support for fan control, margining, and general-purpose PWM functions.

Fan-control signals can be sent using PMBus commands or generated from one of two built-in fan-control algorithms. PWM outputs combined with temperature and fan-speed measurements provide a complete fan-control solution for up to four independent fans.

The TI Fusion Digital Power designer software is provided for device configuration. This PC-based graphical user interface (GUI) offers an intuitive interface for configuring, storing, and monitoring all system operating parameters.

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Download

The most current UCD90xxx PMBus™ Command Reference is available at https://www.ti.com/fusiondocs

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 12
Type Title Date
* Datasheet UCD90124 12-Rail Sequencer and System Health Monitor With Fan Control datasheet (Rev. B) Sep. 03, 2010
* Errata Errata Report for the UCD90120 and UCD90124 Devices Apr. 26, 2010
Application notes Design Voltage Margining Circuit for UCD90xxx Power Sequencer and System Manager (Rev. A) May 21, 2019
Application notes UCD90xxx Family Frequently Asked Questions and Answers (Rev. B) Apr. 12, 2019
User guides UCD90xxx Sequencer and System Health Controller PMBus™ Command Reference (Rev. G) Apr. 03, 2019
Technical articles Sequencing and managing multiple power rails in a system: common questions answered Feb. 01, 2017
Technical articles Automotive electronics design made easy Jul. 18, 2013
Technical articles John discusses benefits of LEDs in automobiles Jul. 16, 2013
Application notes Monitoring Voltage, Current and Temperature Using the UCD9012x Mar. 23, 2012
User guides UCD90SEQ64EVM-650: 64-Pin Sequencer Development Board Dec. 27, 2010
Technical articles New Design Tool Helps Select the Right Supervisor and Sequencer Mar. 30, 2010
User guides UCD90120/4 EVM User's Guide Oct. 06, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

The UCD90SEQ64EVM-650 is a fully assembled and tested circuit for evaluating the 64-pin Sequencer and System Health Controller, including the UCD90120, UCD90124, UCD90120A, UCD90124A, UCD90910 and UCD90160.

Features
  • Monitor and Sequence 12 Voltage Rails
  • Non-Volatile Error Logging
  • Closed Loop Margining for 10 Rails
  • Watchdog Timer and System Reset
  • Flexible Digital I/O Configuration
  • Wide Range Single Supply (3.3V to 12V)
INTERFACE ADAPTERS Download
99
Description

This EVM serves as an interface adapter or a bridge between a host PC (IBM™ compatible) and one or multiple slave devices via a standard type-A to mini-B USB cable. The communication between the USB interface adapter and the host PC is via USB, while the communication between the USB interface (...)

Features
  • Supports master mode I²C, SMBus or PMBus as well as GPIO.
  • Supports USB1.1 full speed at 12 Mbit/s. The USB interface adapter is recognized by the host as a generic human interface device (HID), so no proprietary USB or HID driver is needed. Therefore, the USB interface adapter can be treated as a (...)

Software development

APPLICATION SOFTWARE & FRAMEWORKS Download
Digital Power Software
FUSION_DIGITAL_POWER_DESIGNER Fusion Digital Power™  is the Graphical User Interface (GUI) used to configure and monitor select Texas Instruments digital power controllers and sequencer/health monitors. The application uses the PMBus protocol to communicate with the device over serial bus by way of a TI USB adapter.
Features

Some of the tasks you can perform with the GUI include:

  • Turn on or off the power supply output, either through the hardware control line or the PMBus OPERATION command
  • Monitor real-time data. Items such as input voltage, output voltage, output current, temperature, and warnings/faults are continuously (...)
APPLICATION SOFTWARE & FRAMEWORKS Download
Fusion Digital Power Manufacturing Tool
FUSION_MFR_GUI The Fusion Digital Power Manufacturing Tool (aka MFR GUI) is a Graphical User Interface used to download firmware, upgrade firmware, configure, calibrate and test .

The MFR GUI supports the same devices as Fusion Digital Power Designer software.  This tool is typically used in manufacturing (...)

Features

Some of the tasks the tool can perform include:

  • Download/Upgrade firmware
  • Program a device configuration
  • Calibrate a device (manually or instrumented via GPIB):
    • Input voltage (Vin)
    • Output voltage (Vout)
    • Output current (Iout)
    • Temperature
  • Test the device (validate power conversion falls within acceptable Vout (...)

Design tools & simulation

SIMULATION MODELS Download
SLVC319.PDF (84 KB) - BSDL Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
SLVC676.ZIP (88 KB)

CAD/CAE symbols

Package Pins Download
VQFN (RGC) 64 View options

Ordering & quality

Support & training

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