9xNPSFu

Adjustable boost circuit based on SB628

Overview

VIN: 2V ~ 24VVomax = 28VFsw: The 1.2MHz fixed switching frequency
schematic diagram is basically drawn in the data sheet. Thanks to the 1.2Mhz switching frequency, the output ripple is very small. The characteristics of this chip are small size and simple peripheral circuits. , has a large output current.
Of course, this chip can also be made into a numerically controlled boost circuit. However, to build a closed loop, the simplest way is to output a PWM analog DAC from the microcontroller to change the output voltage.
Next, watch the test:
Video In the attachment,

this is when the output is adjusted to the maximum. By changing the resistor ratio, the maximum value of the chip can be output to 28V.

Design Files

bos1.mp4

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Update:2025-06-24 08:55:29

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