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STWBC2-HP датащи(PDF) 15 Page - STMicroelectronics

номер детали STWBC2-HP
подробное описание детали  Digital controller for wireless battery charger transmitters
PDF  96 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STWBC2-HP датащи(HTML) 15 Page - STMicroelectronics

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Figure 19. DC-DC buck monitor
Table 9. DC-DC buck monitor operating parameters
Parameter
Value
Division factor from VDD to ADC mux
2.86
LPF
10k Hz 2nd order
2.1.5
Analog demodulators
2.1.5.1
Voltage demodulator
The voltage demodulator detects Rx modulation from the variation of the ringing node voltage.
Figure 20. Voltage demodulator
The ring voltage monitor cell provides the peak-to-peak of the probed voltage (see Ring voltage monitor
(Ring_V)). It provides also a rectification of the ringing voltage. From SPI register, the FW can select on-the-fly
the peak-to-peak or the rectified signal to be demodulated. The selected signal is directly filtered using a HPF
and an LPF to select the band of the useful modulation. This filtered signal is shipped to ADC mux for STM32
acquisition through ADC. The signal is also sent to a comparator in order to provide a direct digital 1bit form of the
modulation to an STM32 GPIO.
Table 10. Voltage demodulator operating parameters
Parameter
Value
Demodulation HPF
2nd order
F0 adjustable by SPI registers to 300 Hz, 450 Hz, 600 Hz, 750 Hz
Frequency tolerance +/-10%
STWBC2-HP
Analog AFE functions
DS13825 - Rev 1.0
page 15/96



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