Questions tagged [power-management]

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Supercapacitor as PMIC Storage Element

I'm currently trying to design a system that incorporates an ADP5092 which can use a supercapacitor as the storage element but I am also considering other similar PMIC chips so this is more for ...
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1answer
54 views

Battery Management Controller

I designed a wearable with a 3.7V Li-Po battery (381018). Everything worked good at the begining and now after 6 months I realize some circuits are not charging anymore. For what I understood when I ...
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0answers
94 views

Powering down parts of a pcb to conserve power, is it possible? Any caveats?

I'm building a USB 2.0 bus-powered STM32F429-based audio device that is able to run in a stand-alone mode from a phone charger, or running as a USB device when connected to a computer. To comply with ...
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47 views

Setting register values over i2c from Linux (managing power on a PocketCHIP)

TL;DR - I need to set the contents of a register on a power management IC over I2C from Linux running on an SBC. I've found the datasheet for the IC, but I don't know how to use the information in it ...
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0answers
75 views

Powering ESP32 LDO or Buck converter

im designing an ESP32 system with three haptic drivers. Description of the system: 3 Drivers: 3.3 V 15 mA ESP32-pico-D4: 3.3V Sleep mode: 50 mA Active mode: 150-300 mA Antenna: Compact Reach XtendTM ...
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0answers
56 views

space constrained, cost constrained; super capacitor UPS decision paralysis

I am currently in the process of evaluation of options regarding Super capacitor UPS designs. The requirements are simple, find the most effective solution to keep alive 5V supply line for ~20 ...
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0answers
57 views

Battery management for 12-24V motors

We have 4 12-24V motors which we want to connect to a 14,8V battery. Two of the motors are position controlled (M3 and M4, see figure) and will not draw much current as they will mainly be stationary. ...
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32 views

what is the best power management system (DC -DC)?

I would like to create a low-power management system (DC-DC Boost converter)to power up to two systems. The power management system will take a power input that changes from time to time and make sure ...
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38 views

How should I implement a USB-C Power Mux Circuit with Enable?

I'm designing a device which can be powered by DC IN or USB-C. The USB-C is a DRP, so it may be tasked either with sinking or sourcing power. The DC IN may be between 5V and 20V, so from here I'll ...
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36 views

Simultaneous charging and powering device for DIY project (12v)

I'm planning to build a DIY Raspberry Pi tablet powered by three 18650 li-ion cells. I want to be able to use the device and charge the batteries at the same time, like it's common for tablets. Here ...
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52 views

Working of -12V buck-boost supply using LM2576

I want to make a -12V supply and I came across a circuit using LM2576 that match my requirement but I am not confident enough about its working. There is a note in the datasheet page no-16, ...
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64 views

Two IP5306s one Battery

I have a circuit which provides power to an SOC and charges a battery when needed. For this, I have chosen to use two IP5306s. The reason I use two of them is because of the "feature" it has ...
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16 views

Supply interchanges between AA batteries in series and solar panel

I want to supply my product that has a sleep consumption of 40uA and an elevated consumption of 200mA during standard use. I want to use the solar panel to supply the 40uA during the sleeping time and ...
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41 views

Multiple voltage level on multiple rail using ORing PMIC

I have two voltage rail that i would like to have 4 different voltage levels 0v, 5v, V1, V2. where V1 and V2 are anywhere from 6v to 60v. The two voltage rail can have any of the voltage at any time. ...
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95 views

Boost converter voltage drop

I used both the TPS610986 and TPS61291 boost converter in order to power a load that consumes around 200mA in both situations (TPS610986 powering the load then use the TPS61291 to power the same load)....
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44 views

Power management controller with multiple inputs

I have planned a (quite complex) controller for a project based on a Raspberry Pi (web UI, logging, camera framegrabbing/video processing, LTE uplink), i2c sensors (assortment of environment sensors), ...
0
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1answer
61 views

STM6600 voltage divider on VCC for high voltage applications

I'm evaluating the STM6600 on/off controller. My application has a 2-series LiPo battery with a voltage range of 6 to 8.4V, so I need to put a voltage divider before VCC as described in AN3271 (...
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38 views

Is there a Energy Harvesting Power Management and Battery Charging EVM dev kit (e.g. BQ25504) with easily adjustable voltage thresholds?

I have a BQ25504EVM-674 Energy Harvesting Power Management with Battery Charging (EHM) development board by Texas Instruments. It fulfills my requirement of charging an energy store (e.g. supercap/...