Scribd
Upload
18 views2 pages

CSE Mini Project: Mobile Charger Design

The document outlines the design of a basic mobile charger circuit with overcharging protection, aimed at ensuring safe charging for lithium-ion batteries. It includes sections for AC to DC conversion, voltage regulation using an LM7805, and overcharging protection via an LM393 comparator. The design is intended to enhance battery longevity and safety, with potential for future improvements such as current limiting and compliance with advanced charging standards.

Uploaded by

vuchuruprudhvi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
18 views2 pages

CSE Mini Project: Mobile Charger Design

The document outlines the design of a basic mobile charger circuit with overcharging protection, aimed at ensuring safe charging for lithium-ion batteries. It includes sections for AC to DC conversion, voltage regulation using an LM7805, and overcharging protection via an LM393 comparator. The design is intended to enhance battery longevity and safety, with potential for future improvements such as current limiting and compliance with advanced charging standards.

Uploaded by

vuchuruprudhvi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

HYDERABAD INSTITUTE OF TECHNOLOGY & MANAGEMENT

Affiliated to JNTUH, Approved by AICTE and Accredited by NAAC)


Gowdavelli(vill), Medchal, Hyderabad – 501401
Department of Computer Science and Engineering-CSE-D

Mini Project (2024-2025)

Title: Design a basic mobile charger circuit with

overcharging protection.

Date: 07/11/2024

Abstract:

document presents the design of a basic mobile charger circuit with overcharging protection,
aimed at ensuring safe and efficient charging for lithium-ion batteries commonly used in mobile
devices. The circuit integrates three main sections: AC to DC conversion, voltage regulation, and
overcharging protection. The AC to DC conversion is achieved using a step-down transformer, a
bridge rectifier, and a filter capacitor to smooth the output, providing a stable DC voltage. A 5V
voltage regulator (LM7805) is then employed to step down the DC voltage to the required 5V
output for charging mobile devices. To prevent damage from overcharging, the overcharging
protection is implemented using an LM393 comparator, which monitors the battery voltage. The
comparator compares the battery voltage to a preset threshold (typically 4.2V for lithium-ion
batteries). If the battery voltage exceeds the threshold, the comparator triggers an N-channel
MOSFET to disconnect the charging current, thus preventing overcharge. When the battery
voltage drops below the threshold, the MOSFET is re-engaged, allowing the charging process to
resume. This design provides a basic but reliable charging solution with built-in overcharge
protection, ensuring both the longevity of the battery and the safety of the charging process.
Future enhancements could include current limiting, thermal protection, or compliance with
advanced charging standards like USB Type-C.

Keywords: Overcharging protection, voltage regulator, lithium-ion battery, charging IC, safety
circuit, efficient charging, USB power supply, compact design, cost-efficient and battery
management.

S.No Roll Number Name Phone Number

1. 24E51A05P0 V.PRUDHVI 7981695409

2. 24E51A05O8 V.HAREESH 8074662335


3. 24E51A05M9 S.MAHESH 9347711523

4. 24E51A05M3 S.SALMAN 9182362407

You might also like