STEVAL-ISB001V1: 1 Cell Charger using Discretes

Summary

This application note is a Ringing Choke Converter (RCC)-based, step-by-step cell phone battery charger design procedure.

The RCC is essential to the self-oscillating fly-back converter, and operates within the Discontinuous Conduction Mode (DCM) and Continuous Conduction Mode (CCM) boundaries without noticeable reverse recovery of the output rectifying diodes. RCC control is achieved by using discrete components to control the peak current mode, so the overall RCC cost is relatively low compared to the conventional Pulse Width Modulation (PWM) IC fly-back converter. As a result, RCC is widely used for low power applications in industry and home appliances as a simple and cost-effective solution.

Specifications

Manufacturer	STMicroelectronics
Category	Power Management
Sub-Category	Battery Chargers
Eval Board Part Number	497-5682-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
Cell Type	Lithium Ion, Li-Ion
Configuration	1 Cell
Voltage In	85 ~ 265 VAC
Voltage Out	4.743 V
Current Out	400 mA
Features	Light Load Mode
Quiescent Current [Typical]	224 mA
Sleep Mode Current [Typical]
Component Count + Extras	47 + 0
Application / Target Market	Cell Phones
Design Author	STMicroelectronics
Main I.C. Base Part	STD1NK60
Quiescent Current [Maximum]	242 mA
Sleep Mode Current [Maximum]
Date Created By Author
Date Added To Library	2011-03