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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
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Key Features
Applications/Uses
Simplified Block Diagram
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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.
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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