SLVSI55 December 2025 TPSM8F7620
PRODUCTION DATA
The SYNC pin is used to synchronize the internal oscillator to an external clock. When synchronized to an external clock, the TPSM8F7x20 operates in FPWM. The internal oscillator can be synchronized to a positive edge into the SYNC pin. The rising edge voltage at the SYNC pin must exceed the SYNC amplitude threshold of VIH(sync) to trip the internal synchronization pulse detector. The minimum SYNC rising pulse and falling pulse durations must be longer than tSYNC(IH) and tSYNC(IL) respectively. The TPSM8F7x20 switching action can be synchronized to an external clock from 320kHz to 2.6MHz. When synchronizing to an external clock, the frequency input must be within approximately ±20% of the internal clock frequency programmed by the RT pin. This action prevents large frequency changes in the event of loss of synchronization. This action is also used to set the slope compensation for secondary devices.
| This image shows the conditions needed for detection of a synchronization signal. |