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TDA8380A Scheda tecnica(PDF) 8 Page - NXP Semiconductors |
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TDA8380A Scheda tecnica(HTML) 8 Page - NXP Semiconductors |
8 / 20 page November 1993 8 Philips Semiconductors Product specification Control circuit for switched mode power supplies TDA8380A Figure 7 illustrates synchronization using a pulse transformer. Internal circuitry causes a DC shift which informs the device that synchronization pulses are present (spikes around 0 V at the output of the pulse transformer) or not present (DC 0 V at the output of the pulse transformer). When synchronization is not used the SYNC pin must be connected to VCC, it must not be connected directly to ground or left open. Fig.7 Synchronization using a pulse transformer. Synchronization pulses present. Synchronization pulses not present. |
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