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I'm designing a battery charger using monolithic step-down battery charger that operates over a 4.95V to 32V input voltage range.

On the datasheet I found a typical schematic for 2 cells but using just 1 cell Li-ion battery. Do you know if using the typical design for 2 cells I can charge my 1 cell battery? Or do I have to change anything?

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    \$\begingroup\$ Probably not. What does the datasheet say? \$\endgroup\$ – winny Jul 11 '18 at 20:59
  • \$\begingroup\$ I'm using the LT 3652 and it says the typical design for charge 2 cells li-ion batteries \$\endgroup\$ – BarqLar Jul 11 '18 at 21:20
  • \$\begingroup\$ Can you set the termination voltage? \$\endgroup\$ – winny Jul 11 '18 at 21:21
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You need to change the 542K and 459k resistors in their typical application diagram shown here.

Page 7 shows the formula, and a quick calculation on my end suggests 272k for R1 and 3M for R2 for a float voltage of 3.6v (Assumes LiFePo4 chemistry)

Page 15 goes into details for another resistor configuration for a 3.6v cuttoff voltage using lower resistance values that may be easier to find high precision resistors for.

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