7.5.2.1 DELAY/M_DRV

A resistance in the range between 500 Ω and 170 kΩ must to be connected to the DELAY/M_DRV pin to select a valid time interval. At the POR and during the reading of the resistance, the DELAY/M_DRV is connected to an analog signal chain through a mux. After the reading of the resistance, the analog circuit is switched off and the DELAY/M_DRV is connected to a digital circuit.

In this state, a logic HIGH applied to the DELAY/M_DRV pin is interpreted by the TPL5110 as a manual power ON. The manual power ON detection is provided with a de-bounce feature (on both edges) which makes the TPL5110 insensitive to the glitches on the DELAY/M_DRV.

The M_DRV must stay high for at least 20 ms to be valid. Once a valid signal at DELAY/M_DRV is understood as a manual power on, the DRV signal will be asserted in the next 10 ms. Its duration will be according to the programmed time interval (minus 50 ms), or less if the DONE is received.

A manual power ON signal resets all the counters. The counters will restart as soon as a valid manual power ON signal is recognized and the signal at DELAY/M_DRV pin is asserted LOW. Due to the asynchronous nature of the manual power ON signal and its arbitrary duration, the LOW status of the DRV signal may be affected by an uncertainty of about ±5 ms.

An extended assertion of a logic HIGH at the DELAY/M_DRV pin will turn on the MOSFET for a time longer than the programmed time interval. DONE signals received while the DELAY/M_DRV is HIGH are ignored. If the DRV is already LOW (MOSFET ON) the manual power ON is ignored.