SNVSCB8A march 2023 – april 2023 TPSF12C3
PRODUCTION DATA
EMI filter designs, both passive and active, typically use MOVs connected from the power lines to chassis ground to clamp surge voltage transients. While the sense pins of the TPSF12C3 have internal clamp protection, the higher value of inject capacitance produces larger currents during surge events and thus requires external protection. Place a bidirectional TVS diode on the low-voltage side of the inject capacitor with standoff voltage of 24 V. Using the SOD-323 packaged device given in Table 9-2, clamping occurs at 40 V and 50 V with surge currents of 1 A and 8 A, respectively.