STEVAL-ISB001V1: 1 Cell Charger using Discretes


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.


Manufacturer STMicroelectronics
Category Power Management
Sub-Category Battery Chargers
Eval Board Part Number 497-5682-ND
Eval Board Supplier STMicroelectronics
Eval Board -
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 Cellular Phone
Design Author STMicroelectronics
Main I.C. Base Part STD1NK60
Quiescent Current [Maximum] 242 mA
Sleep Mode Current [Maximum]

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