Power Bank Circuit for Smartphone | Full Circuit Explanation
Fig. 1: Circuit diagram of the power bank. Here, a lithium-ion charger module based on TP4056 IC, rechargeable lithium-ion battery (Samsung type 18650) and DC-DC converter module based on pulse frequency modulation (PFM) technology are used.. The battery charger module, shown in Fig. 2, is designed around a dedicated lithium-ion battery charger