Questions tagged [buck-boost]
A non-isolated DC-DC converter topology
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Constant output voltage in buck-boost converters
I'm a self-taught student. I'm trying to understand the working principle of buck-boost converters in continous conduction mode.
When the switch is turned on, the equation describing the inductor is ...
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Voltage regulation for backup battery power circuit
I am building a GPS tracker where I need to have the option to drive the device from an external power source up to 40 V and have an internal 3.7 V backup battery.
My GSM Modem (Quectel M66) needs 4 V ...
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Automobile 12V UPS circuit with Li ion battery
Currently I have a battery backup circuit for a GPS device to run on automobile power source and I am trying to improve a few things. Any help is appreciated.
Currently I am facing issues of negative ...
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Reliable battery power converter for ESP32 [closed]
I have seen similar (but just similar) questions here, so I decided to ask anyway.
What is a buck-boost module, preferrably from Aliexpress, that I can use to power an ESP32 with 3.3 V from a 3.7 V ...
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Why inductor don't discharge completely even when the duty cycle is 50%?
1] My simple buck convertor circuit description
I made this buck convertor on my breadboard- Falstad simulation
The battery voltage is 12 V
And the MOSFET is a N-channel enhancement mode MOSFET
The ...
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Closed Loop Buck-Boost converter, no load condition
My question is how can I close the loop with no load condition of my buck-boost converter, by using peak limiting current mode control? Is the bleeder resistor needed or is it possible just to close ...
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Is there anything wrong with doing a buck then boost converter instead of a buck boost
I was trying to find a buck-boost converter that can do 5A with a voltage input range of 12 and a output range of 5-20 for usb pd. I found that if I did a buck then boost converter the price for both ...
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Current sensing in DC-DC converter
I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
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Troubleshooting Voltage Sensing Issues in Buck-Boost Chip Simulations
I performed a simulation on a buck-boost chip (LT8390). I understand that the sensing resistor placed between LSP and LSN is supposed to sense the differential voltage. This voltage is then amplified ...
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Is a buck-boost converter good enough as circuit protection for an automotive application?
I am designing a circuit for a automotive application that requires a stable regulated 12V supply. The supply in turn must be powered by an automotive battery.
I am currently looking at using a ...
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Using Buck-Boost as LED driver
I am trying to use a buck-boost controller like LT8390 as a LED driver. This controller can act as a current controller if the current through sensing resistor connected to (ISP/ISN) can be adjusted. ...
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Enable/Disable Power of Board with ESP32-S3
I am using TPS63001 Buck-Boost Coverter with a 3.7 Li-Ion Recharable battery. I want to Control Power of the board with ESP32-S3-Mini. Enable pin of the TPS63001 is connected to MCU and its also ...
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Sensing Resistor in Buck-Boost controllers
In the LT8390, there are two sensing resistors. The one connected to LSN/LSP is called RSENSE(Buck), and the one connected to ISP/ISN is called RSENSE(BOOST). To illustrate this more clearly, I've ...
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Peak current-mode controller
I am studying a peak current-mode controller, and here is the schematic without slope compensation:
Before introducing RSENSE to the design, I understood that if feedback voltage increases, it is ...
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Why doesn't the polarity of the inductor reverse in this buck-boost?
Given the buck-boost below
Fig. 3.33, page 62 from Fundamentals of Power Electronics 3rd edition by Robert W. Erickson and Dragan Maksimovic
If we assume the transistor is in conduction mode and the ...
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