UCD90124 Texas instruments

UCD90124

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UCD90124

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Описание

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 V_REF
- 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.

Supply voltage (min) (V)	3
Number of supplies monitored	13
Supply voltage (max) (V)	3.6
Iq (typ) (mA)	50
Number of sequenced outputs	12
Rating	Catalog
Operating temperature range (°C)	-40 to 125