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Low power consumption solar photovoltaic charging control board solution based on ST LM2904

公開時間 : 2020-04-15 LM2904
This article tells you about low-power solar photovoltaic charging control board solution based on ST LM2904, you can't miss it.

プログラム紹介

The solar photovoltaic industry is one of the green new energy industries that China is vigorously promoting. Because of its simple installation, low cost, and long service life, it has become more and more popular. It can be seen from the program block diagram that the solar controller is a key device of the entire photovoltaic device. It is specifically responsible for battery charging management, such as implementing overcharge protection and preventing battery current backflow and other functions. The core component of the controller is based on the LM2904's high-precision, low-power op amp, coupled with power Schottky diodes and low-voltage MOS, to form a powerful, low-cost, simple to use solar controller.


Scene application diagram


Display board photos

Solution block diagram


Product housing


Core technical advantages

ST's LM2904 is a dual op amp IC with high accuracy and extremely low static power consumption, making it ideal for new energy applications. In our scheme, a dual op amp is used to achieve two functions of battery overshoot protection and pulse charging.

Scheme specifications

Photovoltaic panel DC input voltage: 20 ~ 40V

Charging current range: 0 ~ 3A

Battery voltage specification: 24V

コアデバイス

No. 部品番号 メーカー
1 LM2904AQM8-13 Diodes
2 LM2904SNG ON
3 LM2904AS-13 Diodes
4 LM2904-VR 3PEAK
5 LM2904GD HTC
6 LM2904 TION