Share a 8-90V 5V2A battery pack power supply step-down constant voltage chip solution

hitszlzq

Share a 8-90V 5V2A battery pack power supply step-down constant voltage chip solution [Copy link]

8-90V step-down 5V2A 12V2A conversion efficiency reaches over 90%, the output voltage is adjustable from 4V to 30V, the chip has built-in over-temperature protection, built-in soft start, built-in output short-circuit protection, suitable for GPS locators, power tools, bicycle controllers, instruments, balance cars and other applications. This content was originally created by EEWORLD forum user hitszlzq. If you need to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source

hitszlzq

PCB: 8-90V to 5V2A BOM:

whuer

The circuit is too complex. Many components can be integrated into the chip, but they are not. Instead, they are placed outside.

PowerAnts

The efficiency of this wide voltage is generally not high. 90% should be the maximum efficiency. Other places will be ugly. Here is a high and low voltage efficiency curve for you to see.

qwqwqw2088

The key to the problem is SL3036. You must know the parameters of this chip. Judging from the OP's profile picture, let's not keep you in suspense and get straight to the point. The typical circuit includes test curves and so on.

hitszlzq

SL3036_DS02CN.pdf (779.02 KB, downloads: 11)

2018-6-25 10:00 上传

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Here is the SL3036 specification sheet, please have a look.

star_66666

A very complex simple circuit

hitszlzq

star_66666 posted on 2018-6-25 10:23 A very complicated simple circuit

Haha, is it complicated or simple?

star_66666

The principle is simple, but the filtering is a bit complicated. The role of resistors and capacitors is relatively large, so it is a complex simple circuit

hitszlzq

star_66666 posted on 2018-6-25 11:27 The principle is simple, but the filtering is a bit complicated. The role of resistors and capacitors is relatively large, so it is a complex simple circuit

star_66666

Thank you for the award, haha