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AN3372 Datasheet(PDF) 22 Page - STMicroelectronics

Part # AN3372
Description  This note describes digital ballast for 70 W HID lamps
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3372 Datasheet(HTML) 22 Page - STMicroelectronics

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ST7 microcontroller application pin use
AN3372
22/37
Doc ID 018625 Rev 1
Figure 13.
PFC Vout sense. Resistor divider
●
Pin 15: MCU analogue input PB1 (AIN1) used for PFC Vlamp+ measurement
●
Pin 16: MCU analogue input PB2 (AIN2) used for PFC Vlamp- measurement.
Figure 14.
PFC Vlamp measurements. Resistor dividers
The lamp voltage feedback signal is obtained directly connecting a resistor divider to the
lamp. It is designed to obtain a voltage on Vlamp- and Vlamp- compatible with 5 V MCU
voltage.



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