UCD9090 Sequencer

By Texas Instruments 104

UCD9090 Sequencer

Texas Instruments' 10-rail PMBus/I2C addressable power-supply sequencer and monitor. The device integrates a 12-bit ADC for monitoring up to ten power-supply voltage inputs. Twenty-three GPIO pins can be used for power supply enables, power-on reset signals, external interrupts, cascading, or other system functions. Ten of these pins offer PWM functionality. Using these pins, the UCD9090 offers support for margining and general-purpose PWM functions. Specific power states can be achieved using the Pin-Selected Rail States feature. This feature allows with the use of up to three GPIs to enable and disable any rail. This is useful for implementing system low-power modes and the Advanced Configuration and Power Interface (ACPI) specification that is used for hardware devices.

Features Applications
  • Sequence on and off up to 10 rails
  • Dependencies on time, parent rails, GPIs, and I2C
  • Independent turn on and turn off configurations
  • Flexible GPIO for enables, power goods, and more
  • BOOLEAN logic builder
  • Detect OV and UV power supply warnings and faults
  • Respond to faults by configuring retries, shutdown delays, and slave rails to shutdown
  • User settable scale factors convert to actual system units including voltage, current, and temperature
  • Six optional comparators for fault response in < 80 µs
  • Non-volatile fault and peak logging for aid in failure analysis
  • Simultaneously margin up to 10 rails using PWM outputs
  • Support for open-loop or closed-loop methods
  • Command rails high and low using I2C or control pins
  • All unused margining outputs can be used as GPIO
  • Industrial / ATE
  • Telecommunications equipment
  • Networking equipment
  • Servers and storage systems
  • Any system requiring sequencing
  • Monitoring of multiple power rails
  • Sequencing: flexible ramping of multiple rails
  • Monitoring: detect power supply warnings and faults. Also with Non-volatile memory for failure analysis.
  • Margining for pre-production equipment testing
  • JTAG for production configuration programming and PMBus communication interface
  • TI’s Fusion Digital Power GUI: easy-to-use tool offering intuitive graphical interface for configuring, storing, and monitoring all system parameters.