The A4055 is a complete constant-current / constant-voltage linear charger for single cell lithium-Ion batteries. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The A4055 automatically terminates the charge cycle when the charge current drops to 1/10 the programmed value after the final float voltage is reached. https://www.campuscomponent.com/products/ait-semiconductor-battery-management-ic_a4055e5r-ic-589-d/2208614000001843654

The A4055 is a complete constant-current / constant-voltage linear charger for single cell lithium-Ion batteries. No external sense resistor is needed, and no blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature. The charge voltage is fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The A4055 automatically terminates the charge cycle when the charge current drops to 1/10 the programmed value after the final float voltage is reached. https://www.campuscomponent.com/products/ait-semiconductor-battery-management-ic_a4055e5r-ic-589-d/2208614000001843654

The NuMicro M460 series is a 32-bit microcontroller based on Arm Cortex-M4F core, with DSP instruction set and single-precision floating-point unit (FPU), targeted for IoT, Industrial, and consumer applications. The M460 series runs up to 200 MHz, and features 1.7 V to 3.6 V wide operating voltage, -40 °C to 85 °C /105°C wide operating temperature, a variety of packages choice, and excellent high immunity characteristics by ESD HBM 2 KV and EFT 4.4 KV. https://www.campuscomponent.com/products/nuvoton-technology-corporation-m467kjhan-ic-3137-d/2208614000034072459

The NuMicro MG51 series is an embedded Flash type 1T 8051-based microcontroller. The instruction set is fully compatible with the standard 80C51 and performance enhanced. It supports 16/24 MHz core speed and features up to 32 Kbytes Flash memory, 256 Bytes of RAM and 1 Kbyte of auxiliary RAM (XRAM), 4 Kbytes of Flash loader memory (LDROM), 2.4V to 5.5V operating voltage, and -40°C to105°C operating temperature. https://www.campuscomponent.com/products/nuvoton-mg51fb9ae-de-3467-d/2208614000049530031