Power Distribution

The power supply is based on the ASIC circuit PSCLD. The chip consists of regulators and control circuits providing functions like power up, reset and watchdog functions. External buffering is required to provide more current.

The MCU and the PSCLD circuits control charging together, detection being carried out by the PSCLD and higher level intelligent control by the MCU. Charger voltages as well as temperature and size of the battery are measured by internal ADC of MCU or RFI (depending on the state of the phone). MCU measures battery voltage via DSP by means of RFI2 internal ADC.

The detailed power distribution diagrams are given in Baseband blocks and RF blocks documents.

Transceiver Overview

Technical Documentation

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DIY Battery Repair

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