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MAX34441
PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller
Power Supply/Thermal Manager Provides Unparalleled “Black Box” Failure Logging and Energy Efficient Fan Control
Maxim Confidential 
MyMaxim SubscriptionsProduct Details
The MAX34441 is a complex system monitor that can manage up to five power supplies and a fan. The power-supply manager monitors the power-supply output voltage and constantly checks for user-programmable overvoltage and undervoltage thresholds. It can also margin the power-supply output voltage up or down to a user-programmable level. The margining is performed in a closed-loop arrangement whereby the device automatically adjusts a pulse-width-modulated (PWM) output and then measures the resultant output voltage. The power-supply manager can also sequence the supplies in any order at both power-up and power-down. With the addition of an external current-sense amplifier, the device can also monitor currents.
The device also contains closed-loop fan-speed control. Based on user-programmable settings for fan-control PWM duty cycles or RPM speeds at particular temperature breakpoints, the device automatically adjusts the fan speed in a manner to reduce audible noise and power consumption.
The device also contains closed-loop fan-speed control. Based on user-programmable settings for fan-control PWM duty cycles or RPM speeds at particular temperature breakpoints, the device automatically adjusts the fan speed in a manner to reduce audible noise and power consumption.
Key Features
- 5 Channels of Power-Supply Management
- Voltage Measurement/Monitoring
- Differential 12-Bit 1% Accurate ADC
- Min/Max Threshold Excursion Detection
- Supports Current Monitoring with External Current-Sense Amplifier
- Automatic Closed-Loop Margining
- Programmable Up and Down Sequencing
- Power-Good Output
- Voltage Measurement/Monitoring
- 1 Channel of Fan Control
- Supports 3-Wire and 4-Wire Fans
- Automatic Closed-Loop Fan-Speed Control
- Support for Dual Tachometer Fans
- Fan-Fault Detection
- Supports Up to Six Temperature Sensors
- External Thermal Diode Interface with Automatic Series Resistance Cancellation
- One Internal Temperature Sensor
- Support for Up to Four Additional I²C Digital Temp Sensor ICs
- Fault Detection on All Temp Sensors
- PMBus™-Compliant Command Interface
- I²C/SMBus™-Compatible Serial Bus with Bus Timeout Function
- On-Board Nonvolatile Fault Logging and Default Configuration Setting
- No External Clocking Required
- +3.3V Supply Voltage
Applications/Uses
- Base Stations
- Industrial Controls
- Network Switches/Routers
- Servers
- Smart Grid Network Systems
Technical Docs
| Data Sheet | PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller | Jan 18, 2012 | |
| App Note | Level Shifting to Control Power MOSFETs | ||
| App Note | Choose the Right Power Supply for Your FPGA | ||
| Tutorial | Power-Supply Solutions for Altera FPGAs | ||
| Tutorial | Power-Supply Solutions for Xilinx FPGAs | ||
| App Note | Add a "Black Box" Fault Logger to Your "Big (or Small) Box" System |
Click any title below to view the detail page where available.
How to Debug PMBus and SMBus Issues - Part 1: CommunicationDescription
The MAX34441 evaluation kit (EV kit) simplifies evaluation of the MAX34441 and MAX34440 PMBus™ power-supply managers. The MAX34440 controls six power supplies, whereas the MAX34441 controls five power supplies plus a fan. The MAX34441 EV kit ships with the MAX34441 installed and a fan. The fully assembled and tested EV kit includes five power supplies that can be sequenced, monitored, and margined by the MAX34441 or MAX34440 and also includes a fan for closed-loop fan control using the MAX34441.
View DetailsFeatures
- Easy Evaluation of the MAX34441 or MAX34440
- Fully Assembled and Tested
- USB-Controlled GUI
- 5 Channels of Power Supply
- One Fan Control Channel
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Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
Key Features
- 5 Channels of Power-Supply Management
- Voltage Measurement/Monitoring
- Differential 12-Bit 1% Accurate ADC
- Min/Max Threshold Excursion Detection
- Supports Current Monitoring with External Current-Sense Amplifier
- Automatic Closed-Loop Margining
- Programmable Up and Down Sequencing
- Power-Good Output
- Voltage Measurement/Monitoring
- 1 Channel of Fan Control
- Supports 3-Wire and 4-Wire Fans
- Automatic Closed-Loop Fan-Speed Control
- Support for Dual Tachometer Fans
- Fan-Fault Detection
- Supports Up to Six Temperature Sensors
- External Thermal Diode Interface with Automatic Series Resistance Cancellation
- One Internal Temperature Sensor
- Support for Up to Four Additional I²C Digital Temp Sensor ICs
- Fault Detection on All Temp Sensors
- PMBus™-Compliant Command Interface
- I²C/SMBus™-Compatible Serial Bus with Bus Timeout Function
- On-Board Nonvolatile Fault Logging and Default Configuration Setting
- No External Clocking Required
- +3.3V Supply Voltage
Applications/Uses
- Base Stations
- Industrial Controls
- Network Switches/Routers
- Servers
- Smart Grid Network Systems
Description
The MAX34441 is a complex system monitor that can manage up to five power supplies and a fan. The power-supply manager monitors the power-supply output voltage and constantly checks for user-programmable overvoltage and undervoltage thresholds. It can also margin the power-supply output voltage up or down to a user-programmable level. The margining is performed in a closed-loop arrangement whereby the device automatically adjusts a pulse-width-modulated (PWM) output and then measures the resultant output voltage. The power-supply manager can also sequence the supplies in any order at both power-up and power-down. With the addition of an external current-sense amplifier, the device can also monitor currents.
The device also contains closed-loop fan-speed control. Based on user-programmable settings for fan-control PWM duty cycles or RPM speeds at particular temperature breakpoints, the device automatically adjusts the fan speed in a manner to reduce audible noise and power consumption.
The device also contains closed-loop fan-speed control. Based on user-programmable settings for fan-control PWM duty cycles or RPM speeds at particular temperature breakpoints, the device automatically adjusts the fan speed in a manner to reduce audible noise and power consumption.
Technical Docs
| Data Sheet | PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller | Jan 18, 2012 | |
| App Note | Level Shifting to Control Power MOSFETs | ||
| App Note | Choose the Right Power Supply for Your FPGA | ||
| Tutorial | Power-Supply Solutions for Altera FPGAs | ||
| Tutorial | Power-Supply Solutions for Xilinx FPGAs | ||
| App Note | Add a "Black Box" Fault Logger to Your "Big (or Small) Box" System |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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