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AN2808 Scheda tecnica(PDF) 13 Page - STMicroelectronics

Il numero della parte AN2808
Spiegazioni elettronici  The PM6670S device is a complete
PDF  40 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2808 Scheda tecnica(HTML) 13 Page - STMicroelectronics

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AN2808
Configuration
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7
Configuration
The PM6670S board includes four jumpers (JP1, JP2, JP3 and JP5) and two resistors,
which can be configured to select the desired mode of operation.
7.1
JP3 fixed or adjustable output voltage (mode pin)
The JP3 jumper is used to choose between a fixed output voltage (1.5 or 1.8 V) and a
user-defined output voltage in the range of 0.9 to 2.6 V. When connected in the lower
position, the fixed output voltage is selected and the voltage depends on the setting of the
DDRSEL pin (Section 7.2).
If JP3 is in the upper position, the output voltage is given by:
Equation 1
Figure 9.
JP3 (mode) setting
Both the R8 and R9 resistors are set to 39 k
Ω (1.8 V by default) and can be changed by the
user.
VDDQ
ADJ
0.9
R8
R9
+
R8
----------------------
⋅
=



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