Figure 54 Block diagram of TV-out connection
The device has an integrated DVB-H receiver module. Module contains an integrated BB and RF chip, voltage
regulator for the chip and filtering components. It is able to receive 6, 7 or 8MHz (channel width depending
on used standard in different countries) DVB-H transmissions over 470-750MHz band.
The receiver decapsulates IP packets (e.g. audio and video data) from the stream and forwards them to the
The module contains all needed DVB-H receiver functions excluding antenna. Antenna is integrated to the C-
cover and it also requires an external antenna tuning circuit which is controlled by the module itself.
The device uses a 3-pole BL-5F battery. There are two manufacturers for BL-5F batteries and they have
different discharge curves; SW recognizes battery manufacturer from BSI resistor value (27k or 82k).
Charging is controlled by different blocks depending on the situation: If the battery is totally empty, charging
is controlled by CHACON block in N2300 and the battery is first charged with constant current until the voltage
rises above a certain limit (VMSTR+). Then the digital part of N2300 takes care of the charging and PWM
charging is done until PURX is released. After this, SW starts to control the charging.
The device has Li-Ion battery, which has a protection circuit that limits the lowest battery voltage to 2.8V,
and constant current mode is practically never used.
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