ASPM34 datasheet(10/16 Pages) ONSEMI

10 / 16 page

NFVA25012NP2T

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Figure 8. Mounting Screws Torque Order

NOTES:

12.Do not over torque when mounting screws. Too much mounting torque may cause DBC cracks, as well as bolts and Al heat−sink

destruction.

13.Avoid one−sided tightening stress. Figure 8 shows the recommended torque order for the mounting screws. Uneven mounting can cause

the DBC substrate of package to be damaged. The pre−screwing torque is set to 20~30% of maximum torque rating.

Pre − Screwing: 1 → 2

Final Screwing: 2 → 1

TIME CHARTS OF SPMs PROTECTIVE FUNCTION

Figure 9. Under-Voltage Protection (Low-Side)

a1: Control supply voltage rises: after the voltage rises UVDDR, the circuits start to operate when the next input is applied.

a2: Normal operation: IGBT ON and carrying current.

a3: Under-voltage detection (UVDDD).

a4: IGBT OFF in spite of control input condition.

a5: Fault output operation starts with a fixed pulse width according to the condition of the external capacitor CFOD.

a6: Under-voltage reset (UVDDR).

a7: Normal operation: IGBT ON and carrying current by triggering next signal from LOW to HIGH.

Input Signal

Output Current

Fault Output Signal

Control

Supply Voltage

RESET

Protection

Circuit State

SET

RESET

DDR

UVDDD

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