How does a Buck-Boost converter work?

In this video we will see:

The working of buck-boost converter - 1:38
The working of buck-boost converter with waveforms - 3:43
Application of the buck-boost converter - 7:08
Advantages of the buck-boost converter - 7:58
Limitations of the buck-boost converter - 8:03

Earlier Videos:
Double Ended Forward converter - https://youtu.be/ZUshgC7sCZ0
Active Clamp Forward Converter - https://youtu.be/3zkGz46cYL4
Forward Converter - https://youtu.be/iutzeMAYANw
SEPIC converter part 2 - https://youtu.be/_BiaoNiJBHw
SEPIC converter part 1 - https://youtu.be/G4tv4X9VGPM
Flyback converter part 2 - https://youtu.be/WQXNMNcQoXk
Flyback converter part 1 - https://youtu.be/Lalsahf5cGo
Push-pull converter part 2 - https://youtu.be/_sW_LUEcokI
Push-pull converter part 1 - https://youtu.be/8779DJxK3GE
Boost converter design - https://youtu.be/ij4a8_VkpGY
Buck converter design - https://youtu.be/eMJ_ljT20IU
SMPS basics - https://youtu.be/RPffxopaXaY
References -
1. Vishay Application note

Attributes:
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Видео How does a Buck-Boost converter work? канала Foolish Engineer