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Power monitors cut need for external amps

Posted: 28 Sep 2009 ?? ?Print Version ?Bookmark and Share

Keywords:sequencer? monitor? power management? amplifier?

Managing power consumption
The MAX16065/MAX16066 conserve power by using multiple group sequencing. There are many systems in the field today which require a set of functions to be enabled at all times. Lacking adequate flexibility for an application or offering limited programmability, those systems do little to manage power consumption efficiently.

To manage power consumption effectively, the devices offer a group-sequencing feature, which lets the designer customize and enable different application functions at different times. System functions can be programmed to operate while other functions are disabled. Activating selected functions at programmed intervals and turning off/disabling a secondary set of functions allows the designer to manage power intelligently. The result will be a significant savings in power consumption and a lower carbon footprint for the board.

They also increase reliability with nonvolatile fault registers. When a system has a fault, an MCU may have a problem writing the status to external memory. However, the MAX16065/MAX16066 write to fault registers when a fault condition occurs and the system shuts down. The MAX16065/MAX16066 will perform a block write into nonvolatile flash memory. These fault registers provide a useful, higher level of long-term system reliability.

With these fault registers, customers can either save information about a monitored input that caused the problem, or write all of the measured values into flash. Users can then read back fault conditions to help debug design. If a system or board is returned to the factory, the manufacturer will now have useful fault data to analyze and determine what caused the failure.

And a graphical configuration tool saves programming time. Most of the power-management ICs for sequencing and monitoring systems require many hours to program. That is not the case with the MAX16065/MAX16066. These devices offer an easy-to-use graphical configuration tool which will save valuable engineering time. The tool will help to quickly generate data to analyze fault data or test different configurations with an I?C or JTAG interface.

The MAX16065/MAX16066 have a wide 2.8V to 14V operating voltage range, which allows operation directly from an intermediate bus voltage. The devices are fully specified over the -40C to +85C extended temperature range. The MAX16065 is available in a 48-pin, 7mm x 7mm TQFN package; the MAX16066 is available in a 40-pin, 6mm x 6mm TQFN package. Samples are now available. The devices are priced at $6.05. (1000-up, FOB USA).

For application notes on power monitors click here.

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