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ALED6000 Datasheet(PDF) 37 Page - STMicroelectronics

Part # ALED6000
Description  Automotive 3 A single channel LED driver with integrated DC-DC converter
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ALED6000 Datasheet(HTML) 37 Page - STMicroelectronics

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This kind of compensation network just provides one single low frequency pole, given by:
fPLF= 12π⋅CF⋅RU
(41)
Starting from Eq. (18) , the control loop gain module at s=2π*FBW allows fPLF necessary value to be set:
GLOOP,Is=2π⋅fBW = G0kFF⋅VIN⋅fPLFfBW=1
(42)
A typical choice for RU usually falls in the range 1 kΩ to 50 kΩ, in order to provide for CF a reasonable value (in
the range 1 nF – 100 nF) and to proper bias the overvoltage protection Zener diode.
ALED6000
Compensation strategy for alternative topologies
DS13018 - Rev 4
page 37/45



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