ZHCS212C April 2011 – March 2019 UCD90120A
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3 Feature Description
- 7.4
Device Functional Modes
- 7.4.1 Power-Supply Sequencing
- 7.4.2 Pin-Selected Rail States
- 7.4.3 Monitoring
- 7.4.4 Fault Responses and Alert Processing
- 7.4.5 Shut Down All Rails and Sequence On (Resequence)
- 7.4.6 GPIOs
- 7.4.7 GPO Control
- 7.4.8 GPO Dependencies
- 7.4.9 GPO Delays
- 7.4.10 State Machine Mode Enable
- 7.4.11 GPI Special Functions
- 7.4.12 Power-Supply Enables
- 7.4.13 Cascading Multiple Devices
- 7.4.14 PWM Outputs
- 7.4.15 Programmable Multiphase PWMs
- 7.4.16 Margining
- 7.4.17 System Reset Signal
- 7.4.18 Watch Dog Timer
- 7.4.19 Run Time Clock
- 7.4.20 Data and Error Logging to Flash Memory
- 7.4.21 Brownout Function
- 7.4.22 PMBus Address Selection
- 7.5 Programming
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
7.4.1.2 Turn-Off Sequencing
The following sequence-off options are supported for each rail:
- Monitor only – do not sequence-off
- Fixed delay time (TOFF_DELAY) after an OPERATION command to turn off
- Fixed delay time after deassertion of the PMBUS_CNTRL pin
- Fixed time after one or a group of parent rails drop below regulation (POWER_GOOD_OFF)
- Fixed delay time in response to an undervoltage, overvoltage, or max turn-on fault on the rail
- Fixed delay time in response to a fault on a different rail when set as a fault shutdown slave to the faulted rail
- Fixed delay time in response to a GPI reaching a user-specified state
- Any combination of the previous options
The maximum TOFF_DELAY time is 3276 ms.
Figure 11. Sequence-On and Sequence-Off Timing