描述 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.

特性 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.