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Base Station - Hub Edition MagSafe Global V3
Power Section:
The power supply of the system is 12V, which is disconnected when exceeding 19.7V. Software over
voltage protection.
The first way through MP2229/MP9189 DCDC buck pressure to 5.2V, then divided into three ways,
one is through the over current protection IC SC7002 output 5V 1.5a.The second way is through
LDO buck to 3.3V power supply N9013, 5V buck to 3.3v power supply MCU.
The second circuit directly supplies power to the two-circuit full-bridge rectifying circuit through
MP2229/MP9189 voltage regulation.
The third circuit directly supplies power to the two-channel full-bridge rectifying circuit through
MP2229/ MP9189 voltage regulation.
Route 4 supplies power to MP2229/MP9189.Provides PD output energy, communicates with
external PD devices through PD protocol chip, and the maximum output power is 18W.
Wireless charging Section:
1: The MCU output frequency 112kHz-147kHz. The waveform is loaded into the LC circuit
by FS230DB to make the L coil emit a vibrating electromagnetic wave.
2: if there is a receiver in this range, the coil of the receiver receives electromagnetic waves and
converts them into electric energy to make the receiving chip work. After the chip works, it sends
packets of data, which are transmitted back to the transmitting end in the form of electromagnetic
waves through the electromagnetic induction principle between the two coils.
3: the transmitter coil receives the packet, detects the current or voltage, and sends the
communication code to the SCM for analysis through filtering and shaping, LM324 amplification
and other processing. The SCM analyzes the communication code and makes corresponding
actions according to the code, such as shaking hands, identifying, configuring, transmitting energy,
monitoring and regulating energy, etc.
4. Coil AB is A double coil, which can only work one coil at the same time. Coil C is A single coil,
which can work alone or with coil A at the same time. When coil B works, coil A &C does
not work

Summary of content (4 pages)