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| TDA8380A Datasheet, PDF (8/20 Pages) NXP Semiconductors – Control circuit for switched mode power supplies | |||
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Philips Semiconductors
Control circuit for switched mode power supplies
Product speciï¬cation
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.
Synchronization pulses present.
Synchronization pulses not present.
November 1993
Fig.7 Synchronization using a pulse transformer.
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