TPSI2140-Q1: TPSI2140-Q1 Repetitive avalanche spec rating questions

Hello Roy,

The duty cycle mentioned in the AMR condition for avalanche current (I_AVA) specifies the maximum time that the device should be subjected to the avalanche voltage condition (V_AVA) mentioned in the Electrical Characteristics section of the datasheet (6.9):

When an avalanche voltage (V_AVA) in excess of 1.3kV (1.5kV typical) is seen across the internal FETs of the device (S1 to S2 pin voltage), the maximum expected avalanche current (I_AVA) conducted by the FETS is 1mA as specified by the AMR table only if the avalanche condition is applied with a duty cycle of <10%. The time that the device should sustain a particular avalanche current in the presence of a repetitive or cyclical avalanche voltage condition (V_AVA) is determined by the duty cycle specification (<10% in this case).

For example, if the device is repeatably subjected to (V_AVA) with a 600s period, the expected maximum avalanche current (I_AVA) will be 1mA only if the avalanche condition is present for a duty cycle of <10% (< 60s spent in avalanche with > 540s rest period before the subsequent avalanche condition is applied).

Please let us know if further questions arise.

Best,

Hussain

Thanks Hussain!

Hi Roy,

In case it helps, it basically means that if a hipot or withstanding voltage test is performed for 60 second (common automotive standard value), then they need to wait another 540 seconds before testing again. This is to allow the device to cool down, so it is not so hot before the next stressful test.

Thanks,

Alex