Other Parts Discussed in Thread: TPL7407L,
Hello guys,
One of our customers is considering to evaluate TPL7407LA released May/2017 because it seems that the device is improved version of TPL7407L. On TPL7407LA datasheet, they knew that a external diode was not required to be attached between OUT7 and GND in case of inductive driving though it is required in TPL7407L case. Then they had a question about the new device, TPL7407LA as the follow.
Q1. Why the external diode is not required in case of TPL7407LA?
Has the device OUT7 tolerant level against minus surge genarated by any inductive load been improved compare with TPL7407L?
Also they have a few questions about TPL7407LA as the follows.
Q2. The absolute max rating of TPL7407LA OUT1-OUT7 has been degraded from 42V to 32V. But it is no problem for the customer because their load voltage is 12V or 5V DC.
However they want to know whether OUTn tolerant level against any plus surge is similar with TPL7407L or not. For example, I think that TPL7407L is probably no problem if 100ns pulse of 50V is applied to OUTn.
How about TPL7407LA?
Q3. It seems that TPL7407LA typlical Vol is almost same as TPL7407L one. But TPL7407LA maximum Vol is bigger than TPL7407L one. So I think that the graphs of Maximum Collector Current vs Duty Cycle (Fig 3/4) show that the duty cycle deleting is started at lower duty cycle than TPL7407L.
But if the customer apply short pulse (5ms~100ms) to the input for turning on/off of OUTn with long interval (ex. 1~10seconds). In case of this, how much pulse width is allowed in thermal wise as the maximum? And is the pulse width similar with TPL7407L case?
Your reply would be appreciated.
Best regards,
Kazuya Nakai.