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LED6000 Datasheet(PDF) 38 Page - STMicroelectronics

Part # LED6000
Description  3 A, 61 V monolithic current source with dimming capability
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED6000 Datasheet(HTML) 38 Page - STMicroelectronics

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Application notes - alternative topologies
LED6000
38/49
DocID027777 Rev 2
Figure 25. Inverting buck-boost PCB layout (bottom side)
6.2
Positive buck-boost
The buck-boost topology fits the application with an input voltage range that overlaps the
output voltage, VOUT, which is the voltage drop across the LEDs and the sensing resistor.
The positive buck-boost (see Figure 26) can provide a positive output voltage, referred to
ground, but it requires two additional power components, a MOSFET and a Schottky diode.
Figure 26. Positive buck-boost topology



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