Other Parts Discussed in Thread: TL1453,
Hi, team.
I have received questions from customers about this product.
Please tell me about contents because I can't be answered by the contents of the data sheet.
＜Background on receiving questions＞
There is a circuit using TL1453, and trying to expand that circuit to another application.
However, TL1453 from -20℃ does not comply because the application temperature environment from -30℃.
Therefore, if it is TL1451A which is similar function and is pin compatible, since it is -40℃, it is studying whether it can be adapted.
＜Question＞
The difference between the two devices is recognized as the presence or absence of the latch attached to the protection circuit.
①: By connecting the SCP (16) pin to GND, the short circuit protection circuit is invalidated,
Can other functions be used normally?
※ Refer to Figure 14 in the data sheet
②: Please tell me what kind of function the latch of the DTC is.
(If there is related application note and reference circuit , please also send me)
Because：
There is a description related to the latch of the electrical characteristic "dead-time control" section,the following description doesn't be describe the DTC latch.
(Example: Latch mode current, Latched input Voltage)
③: When the DTC pin exceeds "Latchd input Voltage", the dead time latches at 100%
After that, will switching not resume even if lowering the DTC pin voltage?
Because：
Although the Duty limit is arbitrarily applied by the voltage of the DTC pin,
Consider applying a high voltage to the DTC pin to force Duty to 0%.
④: If the latch condition occurs at "③", how can we restore switching?
※ Power ON reset only?
⑤: Even when the short circuit protection latch is invalidated by the procedure heard in "①"
Is the DTC latched separately?
Best regards,
Masumi Sekiguchi
