Eltronicschool. - This is one of the electronic circuit schematic for LiPo battery charging. This circuit is Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431 like in Figure 1 below. The main component used in this circuit are LM317 and TL431 IC.
In this time, beside we give component part of this circuit, we also will give you the global description of this Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431.
Circuit Schematic
Component Part
Circuit schematic like in Figure 1 above is Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431. THis circuit can be used to charge almost all standard 2S LiPo battery packs. The circuit, designed around generally available low-cost components, is very simple, safe, and economical. The typical target voltage of a 2S LiPo battery is usually 8.4 V (note that target voltage is not the same as the nominal voltage, which is 7.4 V typical), and LiPo batteries require a special type of charging mode that uses the CC/CV method (constant current/constant voltage) with 1-C charge grade (1 A for a 1,000-mAh battery).
According Electroschematics site describe The design is optimized for batteries of 1,000 mAh or higher, and the input power source can be any linear/switch-mode power supply capable of catering an output current of minimum 1,500 mA at 18 V. Normally, a LiPo battery connected to this circuit will be charged to 95% of its nominal voltage within 60 minutes and charged up to 100% of its target voltage within two hours thereafter.
The electronics is, in fact, a perfect blend of one constant current source and one constant voltage source built around the popular adjustable three-pin voltage regulator LM317T (IC1 & IC2). Here, IC1 and R1 set the output current limit while IC2, with R2 and P1, sets the regulated voltage output. Related capacitors (C1–C2) are used to increase the circuit stability by reducing unwanted noise. The rest of the electronics is a bunch of visual indicators and their supporting components. LED1 (amber) is the “power-/battery-connected” indicator; LED2 (blue) is the “current flow” indicator; and LED3 (red) is the optional “battery-charged” indicator. The entire circuit can be constructed on a small perf board (see my nearly finished prototype). Both ICs must have heat sinks, and the TO-220 heatsinks should be isolated from other components of the circuit.
In this time, beside we give component part of this circuit, we also will give you the global description of this Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431.
Circuit Schematic
 |
| Figure 1. Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431 |
- LM317 IC
- TL431 IC
- Resistors
- Capacitors
- Diodes
- Variable Resistors
- PNP Transistor
- LEDs
Circuit schematic like in Figure 1 above is Circuit Schematic Standard Compact 2S LiPo Battery Charger using LM317 and TL431. THis circuit can be used to charge almost all standard 2S LiPo battery packs. The circuit, designed around generally available low-cost components, is very simple, safe, and economical. The typical target voltage of a 2S LiPo battery is usually 8.4 V (note that target voltage is not the same as the nominal voltage, which is 7.4 V typical), and LiPo batteries require a special type of charging mode that uses the CC/CV method (constant current/constant voltage) with 1-C charge grade (1 A for a 1,000-mAh battery).
According Electroschematics site describe The design is optimized for batteries of 1,000 mAh or higher, and the input power source can be any linear/switch-mode power supply capable of catering an output current of minimum 1,500 mA at 18 V. Normally, a LiPo battery connected to this circuit will be charged to 95% of its nominal voltage within 60 minutes and charged up to 100% of its target voltage within two hours thereafter.
The electronics is, in fact, a perfect blend of one constant current source and one constant voltage source built around the popular adjustable three-pin voltage regulator LM317T (IC1 & IC2). Here, IC1 and R1 set the output current limit while IC2, with R2 and P1, sets the regulated voltage output. Related capacitors (C1–C2) are used to increase the circuit stability by reducing unwanted noise. The rest of the electronics is a bunch of visual indicators and their supporting components. LED1 (amber) is the “power-/battery-connected” indicator; LED2 (blue) is the “current flow” indicator; and LED3 (red) is the optional “battery-charged” indicator. The entire circuit can be constructed on a small perf board (see my nearly finished prototype). Both ICs must have heat sinks, and the TO-220 heatsinks should be isolated from other components of the circuit.
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