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PMBus 16-Channel V/I Monitor and 12-Channel Sequencer/Marginer

Provides Unparalleled Sequencing, Monitoring, and Fault Logging with PWM Margining

Product Details

The MAX34451 is a power-supply system manager that is capable of monitoring up to 16 different voltage rails or currents and is also capable of sequencing and margining up to 12 power supplies. The system manager monitors the power-supply output voltages and currents and constantly checks them for user programmable over and under threshold limits. If a fault is detected, the device automatically shuts down the system in an orderly fashion. The device can sequence the supplies in any order at both power-up and power-down. The device has the ability to close-loop margin the power-supply output voltages up or down to a user-programmable level. The device contains an internal temperature sensor and can support up to four external remote temperature sensors. Once configured, the device can operate autonomously without any host intervention.

Key Features

  • Integration Enables Management of Multiple Power Supplies to Maximize System Performance
    • 16 Channels of Voltage or Current Monitoring
    • 12 Channels of Sequencing and Margining (8 PWM, 4 External Current DACs (1 x DS4424), and Sequencing
    • Expandable Channel Operation with Parallel Devices
    • Remote Ground Sensing Improves Measurement Accuracy
    • Programmable Up and Down Time-Based or Event-Based Sequencing
    • Dual Sequencing Loops
    • Configurable Combinatorial Logic Supporting Up to 16 GPIs and 20 GPOs
    • Automatic Closed-Loop Margining
    • No External Clocking Required
    • PMBus™ -Compliant Command Interface
  • Fast, Reliable Control and Fault Detection Improves System Reliability
    • Fast Minimum/Maximum Threshold Excursion Detection
    • Supports Up to 5 Temperature Sensors (1 Internal and 4 Remote)
    • Fault Detection on All Temperature Sensors
    • Reports Peak, Minimum, and Average Levels for a Number of Parameters
    • Programmable Alarm Outputs
    • On-Board Nonvolatile Black Box Fault Logging and Default Configuration Setting
  • I2C-/SMBus-Compatible Serial Bus with Bus Time-Out Function Simplifies Additional Temperature Sensors and DACs to the MAX34451
  • +3.0V to +3.6V Supply Voltage

Applications/Uses

  • Base Stations
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems
Parametric specs for Power Supply Sequencers and Voltage Trackers
# Input Channels 12
Interface I2C/SMBus
PMBus™
Option Margining
Monitor
Sequence
VIN (V) (max) 3.3
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/56
Budgetary
Price (See Notes)
$5.66 @1k
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Simplified Block Diagram

MAX34451: Typical Operating Circuit MAX34451: Typical Operating Circuit Zoom icon

Technical Docs

Design & Development

Click any title below to view the detail page where available.

Description

The MAX34451 evaluation kit (EV kit) provides the hardware and software graphical-user interface (GUI) necessary to evaluate the MAX34451 PMBus 16-channel V/I monitor and 12-channel sequencer/marginer. The EV kit includes a MAX34451 installed as well as four power supplies that can be sequenced, monitored, and margined by the device.

View Details

Features

  • Easy Evaluation of the MAX34451
  • Four Power-Supply Channels
  • One Current-Sense Amplifier
  • EV Kit Hardware is USB Powered (USB Cable Included)
  • USB HID interface
  • Windows XP®- and Windows® 7-Compatible Software
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

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Support & Training

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Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.

Parameters

Parametric specs for Power Supply Sequencers and Voltage Trackers
# Input Channels 12
Interface I2C/SMBus
PMBus™
Option Margining
Monitor
Sequence
VIN (V) (max) 3.3
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/56
Budgetary
Price (See Notes)
$5.66 @1k

Key Features

  • Integration Enables Management of Multiple Power Supplies to Maximize System Performance
    • 16 Channels of Voltage or Current Monitoring
    • 12 Channels of Sequencing and Margining (8 PWM, 4 External Current DACs (1 x DS4424), and Sequencing
    • Expandable Channel Operation with Parallel Devices
    • Remote Ground Sensing Improves Measurement Accuracy
    • Programmable Up and Down Time-Based or Event-Based Sequencing
    • Dual Sequencing Loops
    • Configurable Combinatorial Logic Supporting Up to 16 GPIs and 20 GPOs
    • Automatic Closed-Loop Margining
    • No External Clocking Required
    • PMBus™ -Compliant Command Interface
  • Fast, Reliable Control and Fault Detection Improves System Reliability
    • Fast Minimum/Maximum Threshold Excursion Detection
    • Supports Up to 5 Temperature Sensors (1 Internal and 4 Remote)
    • Fault Detection on All Temperature Sensors
    • Reports Peak, Minimum, and Average Levels for a Number of Parameters
    • Programmable Alarm Outputs
    • On-Board Nonvolatile Black Box Fault Logging and Default Configuration Setting
  • I2C-/SMBus-Compatible Serial Bus with Bus Time-Out Function Simplifies Additional Temperature Sensors and DACs to the MAX34451
  • +3.0V to +3.6V Supply Voltage

Applications/Uses

  • Base Stations
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems

Description

The MAX34451 is a power-supply system manager that is capable of monitoring up to 16 different voltage rails or currents and is also capable of sequencing and margining up to 12 power supplies. The system manager monitors the power-supply output voltages and currents and constantly checks them for user programmable over and under threshold limits. If a fault is detected, the device automatically shuts down the system in an orderly fashion. The device can sequence the supplies in any order at both power-up and power-down. The device has the ability to close-loop margin the power-supply output voltages up or down to a user-programmable level. The device contains an internal temperature sensor and can support up to four external remote temperature sensors. Once configured, the device can operate autonomously without any host intervention.

Simplified Block Diagram

MAX34451: Typical Operating Circuit MAX34451: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal.