Philips Semiconductors
TDA1562Q application note
Koninklijke Philips Electronics N.V.
Application note Rev. 01.02 — 05 May 2006 26 of 62
Fig 13. Charge current, output signal and lift capacitor voltage at Po=70W, f=30Hz
Fig. 5 shows the voltages and the charge current while the output signal is clipping. It is
visible now that the charge current is at it’s maximum value almost all the time during the
recharging of the lift capacitor. The lift capacitor voltage almost drops to 5V. In this
situation the charge circuit is only just able to maintain the charge in the lift capacitor.
Fig 14. Charge current, output signal and lift capacitor voltage while lift capacitor is fully
discharged, f=30Hz
(fig 2b)
(fig 2b)
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