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.
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Sequence
- 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
Monitor
- 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
Margin
- 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
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- Industrial / ATE
- Telecommunications equipment
- Networking equipment
- Servers and storage systems
- Any system requiring sequencing
- Monitoring of multiple power rails
Benefits
- 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.
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