AN2813

Alternative driving

Doc ID 14923 Rev 1

19/25

6

Alternative driving

The larger temperature propagation turn-on time dependence of the TDE1708DFT,

described in the previous section (Section 5: Performance characteristics), has led to the

development of an alternative kind of driving which would not suffer from this problem. The

presented driving configuration (see Figure 20) uses both the input signal “IN” together with

the open collector pin “DELAY” (originally dedicated to delay adjustment). The IN signal

controls only the turning off of the switch (the output is blocked by the DELAY pin during its

high state), while the DELAY signal then controls the turning on of the switch (see

Figure 21). This principle results in more positive temperature characteristics (Section 6.1:

Temperature characteristics).