Table of Contents
Mini charging and discharging management module based on LY3205. There is only one mini charging and discharging integrated module based on the LY3205 chip with the size of a Type-C port. The main feature is its small size, which can achieve single-button power on/off.
Schematic LY3205 Mini charging and discharging battery module
About LY3205 IC
LY3205 is a fully integrated motor drive control chip that integrates lithium battery charging management module, motor drive module, motor freewheel diode, key gear control, and protection module, with a standby current of only 5uA. The charging current of LY3205 is 0.6A, with the red light on during charging, the green light on when fully charged, the green light on during discharge, and the green light blinking to indicate low battery. LY3205 has a maximum output current of 1.3A and can also be used in applications requiring more than 1.3A by external expansion of PMOS tubes. LY3205 controls the output switch by single-clicking the button, with a single click to turn on and another single click to turn off.
External TTP223 touch module has been tested, and level signal can also be controlled Single chip realizes charging and discharging, button power on/off, and output protection functions. The maximum output is 1.3A, which can meet the power supply needs of most small-scale projects using a single chip.
Imagine, with just one battery, one chip, and one button switch, you can have a complete power circuit Two versions are available using 0603 and 0402 components, with the 0402 version having only one Type-C female port.
The 0402 version is more crowded, and some routing can be optimized the maximum charging power is 2.5W, and no overheating issues have been found. If an LED is soldered according to my circuit diagram, the red light will be on during charging, and the green light will be on when fully charged.
Pressing the button will turn on the device with a green light, and if the battery is low, the green light will flash Charging and discharging have been tested.
BOM LY3205 Mini charging and discharging battery module
| Parts | Value | Description | Quantity |
|---|---|---|---|
| Capacitors | |||
| C1 | 1uF | 0603 or 0402 – SMD capacitor | 1 |
| C2 | 10uF | 0805 or 0402 – SMD capacitor | 1 |
| C3 | 100nF | 0603 or 0402 – SMD capacitor | 1 |
| Resistors | |||
| R1, R2 | 5.1kΩ | 0603 or 0402- SMD resistor | 2 |
| R3 | 1.5kΩ | 0603 or 0402 – SMD resistor | 1 |
| R4, R5 | 30kΩ | 0603 or 0402 – SMD resistor | 2 |
| Semiconductors | |||
| LED1 | 19-217/GHC-YR1S2/3T | LED0603 or 0402- Green | 1 |
| LED2 | 19-217/BHC-ZL1M2RY/3T | LED0603 or 0402- Blue | 1 |
| U1 | LY3205 | SOT-23-6 – Battery charger and motor driven control |
1 |
| Miscellaneous | |||
| F1 | SMD0805B050TF | F0805 6V 500mA Resettable Fuse | 1 |
| USB1 | GT-USB-7010AO | USB 2.0 5A 1 16P Type-C SMD USB Connector |
1 |
| J1 | Z-211-0311-0021-001 | 1x3P P=2.54mm Pin Header | 1 |
| K1 | GT-TC031A-H020-L1N | 2.9mm 2mm 3.9mm SMD Tactile Switch | 1 |
Download files, links, and notes
Source https://oshwhub.com/heyh/ji-yu-ly3205-de-jian-yi-xiao-deng
