Introduction
Electronic devices and gadgets do not work without batteries and chargers. They are the necessary components for any electronic product. Laptops, mobile phones, electronic gadgets, gaming devices, etc need batteries. Or batteries are the basic requirement of these devices. And batteries have to be charged while using those electronic devices. Also, these device batteries demand lighter Charger circuits that a person can easily carry. Their small size and weight usually impress the designers to employ them in their devices. But, today our major topic is not only battery chargers but Li-Ion Battery chargers. So, in this tutorial, we are going to “Li-Ion Battery Charger Circuit”
Hardware Components
The following components are required to make Li-Ion Battery Charger Circuit
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | IC | MCP73831 | 1 |
| 2. | Speaker | – | 1 |
| 3. | Switch | – | 1 |
| 4. | Electrolyte Capacitor | 4.7uF | 2 |
| 5. | Resistor | 1KΩ, 2KΩ, 3.3Ω, 5KΩ, 10KΩ, 22KΩ,470Ω | 1,1,1,1,1,1,2 |
| 6. | 2-Pin Connector | – | 1 |
MCP73831 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of MCP73831
Li-Ion Battery Charger Circuit
Working Explanation
This Ion Battery Charger Circuit charges the Li-Ion battery cell with variable current output. The four-terminal-select switch in this circuit serves to change the charging current. we apply a DC power supply of 5V to the charge VDD pin. capacitor C1 is there to act as a filter capacitor while LED1 gives the input power source status. Some resistors are connected to the four terminal-select switches and then the common terminal is wired to the PROG pin. You can get different values of charging current by selecting different values of resistors. Red LED 2 is there to show the charging status of a battery and LED 3 is there to glow when the charging of the battery becomes rich.
Application and Uses
- Portable electronic devices.
- MP3 players.
- Mobile phones.
- Digital cameras, etc.
