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AN817 - A Discrete Approach to Battery Charging

Key Features

  • choice due to its small size and high energy density. Li+ cells are generally suited to a constant-current/constant-voltage charging strategy and although relatively simple to imple.

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Datasheet Details

Part number AN817
Manufacturer Vishay
File Size 40.02 KB
Description A Discrete Approach to Battery Charging
Datasheet download datasheet AN817 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AN817 Vishay Siliconix A Discrete Approach to Battery Charging for Cellular Phones Guy Moxey and Michael Speed INTRODUCTION All portable cordless appliances must receive power from an external source, whether it’s a wall cube adapter, car charger, or docking station. This external source will then charge, in a predetermined fashion, the equipment’s internal battery. In the case of a portable phone, the power management system will incorporate charging control circuitry to regulate the voltage supplied to the battery from the external charger. External charging equipment—whether wall cubes or chargers that utilize car cigarette lighters—will supply a continuous but unregulated voltage to the phone, typically 4.2 V for a single Lithium-ion (Li+) cell.