USB chargers have become an indispensable part of our daily lives, keeping our devices powered and ready to go. But have you ever wondered how these chargers work behind the scenes? In this beginner-friendly article, we will uncover the secrets of USB charger designs. We will explore five different reference designs that cater to different charging requirements, using simple language and clear explanations.
Whether you’re a tech enthusiast or just curious about how these chargers function, this guide will empower you to understand and choose the right USB charger for your needs. Let’s dive in and demystify the world of USB charger designs!
USB Charger Reference Designs
1. Dual USB Port Charger
During emergencies or situations without access to traditional power sources, charging USB devices can be challenging. Analog Devices (ADI) has introduced a reference design for a dual USB port charger, the CN0509, aimed at simplifying the design process.
This design can provide a regulated 5V, 2A power supply from various DC sources, accommodating input voltages ranging from 5V to 100V.
The reference design includes two USB charging ports, one with a dedicated charging port (DCP) controller, and offers protection against reverse voltage conditions.
Know more about this reference design: Dual USB Port Charger
2. USB Power Delivery Battery Charger
The design is based on the ATSAMD21J18A microcontroller and features a Pro Kit on Board (PKoB) for USB programming/debugging. It utilizes a Single-Ended Primary Inductor Converter (SEPIC) power supply that meets the 20V/5A 100W USB PD specification.
The charger employs a constant current/constant voltage charge algorithm, ensuring efficient and stable charging. The reference design is fully validated and provides significant time and cost savings for developers.
Know more about this reference design: USB Power Delivery Battery Charger
3. 45-Watt USB Charger
The design offers low standby power, full-regulation output voltage, high efficiency, and reliability. It caters specifically to power supplies for mobile and notebook devices, accommodating power requirements of up to 100W.
The reference design incorporates a quasi-resonant controller, synchronous rectifier controller, and USB-PD Type-C and Quick Charge (QC) 4.0 controller.
It provides multi-protocol support for USB Power Delivery and Quick Charge, ensuring low current ripple and high efficiency. The design features comprehensive hardware-integrated protection and excels in thermal management.
Know more about this reference design: 45-watt USB Charger
4. USB BC 1.2 Compliant Charger
Do you want to design a battery charger that can accurately monitor the status of your battery pack? Then this reference design can simplify your work.
The Reference Design from Maxim Integrated is a single-cell li-ion battery charger. It is optimum for both charging and monitoring the status of a Li-Ion cell.
Know more about this reference design: USB BC 1.2 Compliant Charger
5. Smartphone Fast Charger
Do you want to design a mobile charger that can charge your phone at a super-fast speed?
The Texas Instruments reference design is a single-cell Li-ion charger reference design that uses a dual charging IC configuration to achieve a fast charge with low heat dissipation.
Know more about this reference design: Fast Charger
Recommended: You can also check other interesting reference designs.
