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Charging a Li Pack with an Alkaline Pack and Switching Between Them
Hello everyone,There are several applications where it is preferable to use alkaline batteries. But since they have high internal resistance, I was wondering if it was possible to use the alkaline pack...
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Power your Bluetooth speaker with less
We all like to take our music with us on MP3 players. And since the invention of the boom box, many of us like to share our music as well. Shrinking the size of the boom box without sacrificing...
View ArticleLooking for a combination of LiPO charger, gauge and buck/boost
Hello,I am looking for a power management solution for my uC board that has a 3.7 V LiPo power supply. I need a 3.3 V output with a max current draw of 500 mA, and a battery gauge, as well as a USB...
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Do all rails in an ultra-low power system need ultra-low Iq?
All designers of ultra-low power systems are concerned about battery life. How much time will elapse before the battery in a fitness tracker will need recharging? Or, for primary cell systems, how long...
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Is inductor ripple current as a percentage still relevant in low-power...
Power-supply designers have used various forms of Equation 1 for decades in order to select the correct inductance for their step-down (buck) converters. While Equation 1 is still correct, why should...
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A flexible, easy-to-design MicroSiP power module for portable test and...
Test and measurement equipment such as oscilloscopes and waveform generators has its own set of design challenges, from increasing measurement accuracy to providing a low-cost solution to the...
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Easy supercap backup power for smart grid
Figure 1: Backup power lasts for 6.5 secondsEveryone wants reliable smart meters. Utility customers want them so that the utility knows exactly when there is a power outage without the customer having...
View ArticleRecommended Gate Driver for digitally controlled Synchronous Buck NexFET...
Hello,I am designing a digitally controlled Synchronous Buck Converter. I have chosen CSD87352Q5D (NexFET Power Block) as the main and synchronous MOSFET. TMS320F28335 control card will be used as...
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BOM-optimize your vacuum cleaner!
In the consumer world with products, such as vacuum cleaners and white goods, the Bill of Materials (BOM) is extremely important. The broad array of products and companies designing those products...
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Extend the life of your coin cell with boost + bypass operation!
Picture this--You are designing your company’s latest and greatest water meter and have been asked to increase its battery’s run time by 10% over the previous model. This is now the fourth product...
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A complete low-voltage backup battery solution for eCall systems
The emergency call (eCall) system is a newer electronic subsystem that you’ll be seeing and hearing about much more over the next few years. The continual increase of automobile safety standards has...
View ArticleDriver selection for OSRAM GF CS8PM1.24
Hi,what could be an appropriate driver for OSRAM's LED GF CS8PM1.24 the power source is LiIon battery.
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How can you deliver 1W power from a 10 mW coin cell?
For a smart meter or any other system that needs to wirelessly transmit data, the challenge is the same. How do I deliver Watts of power to my radio, while using a small, robust, and extremely...
View ArticleValidation on Non-Linear Voltage Regulators
Hi,Can someone provide any ideas of the best method to validate non-linear voltage regulators? Impedance profile and Bode-plot used in traditional validation are useless when non-linear voltage...
View ArticleNeed help selecting a DC-DC LED driver
Hi,We are using the TPS62150 in a constant current configuration to drive a white LED up to 1A. Would like to know if there is a more efficient part.Spec's:Vin 2.8V-12VVout 3.0V @ 1A maxThanks,Paul
View ArticleHow to build a 2.5A constant current?
I used to make some constant current supplies such as LM3407, LM3406 driver but all of them below 1.5A. Is there a TI's IC met 2.5A or combinable ICs helped me do this?I'm designing a Cree-XML2 Drivers...
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Charging a Li Pack with an Alkaline Pack and Switching Between Them
Hello everyone,There are several applications where it is preferable to use alkaline batteries. But since they have high internal resistance, I was wondering if it was possible to use the alkaline pack...
View ArticleClik here to view.
Power your Bluetooth speaker with less
We all like to take our music with us on MP3 players. And since the invention of the boom box, many of us like to share our music as well. Shrinking the size of the boom box without sacrificing...
View ArticleLooking for a combination of LiPO charger, gauge and buck/boost
Hello,I am looking for a power management solution for my uC board that has a 3.7 V LiPo power supply. I need a 3.3 V output with a max current draw of 500 mA, and a battery gauge, as well as a USB...
View ArticleClik here to view.
Do all rails in an ultra-low power system need ultra-low Iq?
All designers of ultra-low power systems are concerned about battery life. How much time will elapse before the battery in a fitness tracker will need recharging? Or, for primary cell systems, how long...
View Article