Texas Instruments UCD91160 16-Rail PMBus™ Controlled Power Sequencer
Texas Instruments UCD91160 16-Rail PMBus™ Controlled Power Sequencer includes dedicated pins (MONx) to monitor up to 16 voltage rails in either analog or digital modes. 16 rail enable (ENx) pins allow regulators to be sequenced. Eight margining (MARx) pins can be used to push regulators to high or low limits (margins) for testing, or actively trim outputs for enhanced accuracy. The output state of 16 logical GPO (LGPOx) pins can be controlled by the state of GPIs, rail status, and other LGPOs.
Nonvolatile event logging preserves fault events after a power dropout. The Black Box Fault Log preserves the fault information and the status of all rails. The black box fault log records the first and last fault events before a power-down. The cascading feature offers convenient ways to manage up to 64 voltage rails. The Sequencer Studio™ software is an intuitive PC-based graphic user interface (GUI) that can configure, store, and monitor all system operating parameters. The Texas Instruments UCD91160 comes in a 64-pin QFP package.
Features
- Sequence and monitor up to 16 analog rails
- PWM margining on up to eight rails
- Cascade up to four devices to sequence up to 64 rails
- The active trim function allows the user to trim the output voltage
- Monitor and respond to OV, UV, time-out, and GPI-triggered faults
- Flexible sequencing dependencies, delay times, Boolean logic, and GPIO configurations
- Nonvolatile fault event logging with RTC and timestamping
- Single-event fault log (100 entries)
- Black box fault log saves fault information and status of all rails - for the first fault and the last fault before a power down event
- Rail status-dependent sequencing, delay times, and LGPO pins for complex sequencing applications
- Four rail profiles for adaptive voltage identification (AVID) voltage regulator
- Continue monitoring rails during configuration activities to maximize up-time
- Programmable watchdog timer and system reset
- GPI Controlled Rail Groups
- SEU mitigation and ECC (single-error correct + double-error detect)
- PMBus 1.2 compliant
- PMBus security profile Level 0 with custom commands to enable features in security profile Level 2
Applications
- Wired networking
- Wireless infrastructure
- Datacom module
- Data center and enterprise computing
- Factory automation and control
- Test and measurement
- Medical
Functional Block Diagram
