CPC H02J 7/0047 (2013.01) [H02J 7/0013 (2013.01)] | 20 Claims |
1. A system for supplying power from a multi-cell battery to a single-cell power management integrated circuit, the system comprising:
a first power terminal for receiving a positive battery terminal voltage signal from the multi-cell battery;
a second power terminal for receiving a cell voltage signal from the multi-cell battery;
a voltage converter circuit configured to scale the positive battery terminal voltage signal to generate a scaled voltage signal;
a control circuit configured to:
detect whether the multi-cell battery is a regulated multi-cell battery or an unregulated multi-cell battery based on a voltage at the second power terminal,
select one of the scaled voltage signal or the cell voltage signal based on the detection, and
output a high-impedance single-cell power signal including the selected one of the scaled voltage signal or the cell voltage signal;
a signal buffer circuit configured to buffer the high-impedance single-cell power signal to generate a low-impedance single-cell power signal; and
a third power terminal for sending the low-impedance single-cell power signal to a voltage sense pin of the single-cell power management integrated circuit.
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