●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.
● 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.
