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Pentium Shaver Circuit Reference Design

Overview

This solution uses the internal 10-bit 4-channel AD conversion, GPIO port, etc. of the Renesas 8-bit microcontroller 78F9212. Has the following characteristics:

- 1 hour fast constant current charging, trickle after full charge
- Charging protection control to prevent overcharging and battery damage
- Avoid over-discharge, Vb<2V, stop discharging
- Adapter output 3.3V-3.6V, static power consumption <=1mA
- Detect the charging current, adjust to achieve constant current, and detect the discharge current

. The author analyzes the problems that may occur in the hardware circuit, such as: how to deal with excessive static current, how to suppress transient voltage, how to deal with large static current in the discharge circuit, and power supply Reverse protection, etc.

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-23 08:36:57

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