All Questions
Tagged with buck-boost switch-mode-power-supply
56
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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 ...
- 311
1
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49
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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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33
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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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FET selection and quantity for buck-boost converter design
I am working on designing a buck-boost converter where the input voltage is 24 V regulated, and the output voltage ranges from 12 to 48 V with a current rating of 5 A. The design should also allow for ...
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2
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285
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Non inverting buck boost transfer function
When considering the compensation of a non inverting buck boost (single inductor), the datasheet considers to take into account the worst transfer function between the buck transfer function and the ...
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Seeking a very low cost buck boost 3 V or 5 V to 3.3 V [closed]
I am seeking an SMPS chip for ARM/LoRa PS circuit which needs to use every drop of energy at 3.3 V from a pair of LR6-AA batteries (3V) or use 5V USB.
1
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1
answer
36
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BD8306MUV and idle current
I need to generate 3.3 V from a 3.6 V battery to power a sensor. I choose the Rohm buck-boost converter BD8306MUV for that, but I discovered that it consumes nearly 5 mA of current in idle mode ...
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50
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Buzzing ringing in boost converter regulator when using PWM in lower duty cycle
I designed a boost converter using TI LMR62014XMF, to convert 5 V to 12 V for using as backlight source in my LVDS display adapter.
The LCD display panel needs 12 V at 0.5 A max for backlight driving.
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2
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151
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Why is the output voltage (without capacitor) of a boost converter seen as a perfect square wave?
I am trying to learn about boost converters, but I don't understand why the images of the voltage output always seems to be like a square wave PWM. I understand that assuming perfect inductors, the ...
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2
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1k
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Calculating inductor value for my buck converter [duplicate]
I'm trying to understand the SMPS operation.
The goal is to select inductor (L1) & capacitor (C1) values that satisfy the working condition below:
V1: 22-26 V range.
Power supply required: 1 A.
...
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1
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answer
283
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How do you drive the gate of a MOSFET in an inverting buck-boost converter?
I'm currently working on implementing a buck-boost converter for MPPT of a solar cell, the gate of the transistor is to be fed 0-3.3 V PWMlogic and I am planning on using a gate driver IC to combat ...
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2
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2
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115
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Buck-boost converter (LTC3442) not producing output until excited
EDIT: Added datasheet for the inductor and some oscilloscope measurements.
I'm using a LTC3442 buck-boost converter from Linear Technology / Analog Devices (datasheet) in my design to produce a 3.3V ...
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4
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1
answer
1k
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Why is buck-boost converter showing a different trend than buck and boost in efficiency peaking point?
In general I was under the impression, the efficiency is highest when input and output voltage are close to each other. This holds good for boost (text book image below) and buck (personal experience)....
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1
vote
1
answer
268
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What is the min and max input voltage range of a buck converter to maintain efficiency above 90% [closed]
I want to design a stepdown converter from 72V lithium ion battery to 12V, 5A. I am torn between using a flyback converter and a buck converter. Which topology will give me maximum efficiency at that ...
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2
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760
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Can I use common mode power line choke as 1:1 transformer in isolated buck-boost switched mode power supply at 20 - 100 kHz?
I'm planning to build a multi-output power supply that allows output voltages between 0 - 30 V and currents below 5 A. The idea is that I will purchase a number of 30V 5.3A power bricks (unknown if ...
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