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TPL5111: How to test TPL5111

udhay kumar
Intellectual 275 points
Part Number: TPL5111

Hi,

I'm designing a Bluetooth transceiver module that should send a pocket of data for approximately every 30 sec. So I selected a resistance value of 16K for delay.

For testing purpose, I kept the done signal floating and connected a LED at the DRVn output to monitor the output.

When I apply power continuously without giving any done signal, the LED outputs as follow,

1. some time the LED (default OFF) blinks for once approx every 26 seconds.

2. The same power cycle if I touch the done signal the LED turns ON continuously and blinks from ON to OFF for the same 26 seconds.

What should be the default logical status of the "Done" input when we connect to a microcontroller. Do we need any external pull down resistor.

How to test the timer functionality before connecting this circuit to a microcontroller. The "Done" input is so sensitive so that it triggers the timer by toughing the pin with a DMM probe.