LM5177DCPR datasheet(30/60 Pages) TI2

30 / 60 page

nFLT

BUBO_EN

Log ic

And

De-glitch

___ _____ __

R2D_DONE

___ _____ ___

BOO T_ DO NE

OVP 1

OVP 2

UVLO

CL_OCP

___

TSD

BOO T_ ERR

Figure 7-17. Functional Block Diagram nFLT-pin Logic

Thermal Shutdown (TSD)

To avoid the case of a thermal damage of the device the die temperature of the die is monitored. The device will

stop operation once the sensed temperature rises over the thermal shutdown threshold. After the temperature

drops below the thermal shutdown hysteresis the TSD signal goes back to normal and the converter will return to

normal operation according to the main FSM definition.

Over Current or Short Circuit Protection

The device features a hiccup mode short circuit protection to avoid excessive power dissipation in the die or at

the fault of the application in the System. The OCP triggers if the peak current sensing voltage between CSA-pin

and CSB-pin is exceeded.

The protection feature will stop and restart the converter operation in case of a short is event is detected.

Output Over Voltage Protection 1 (OVP1)

This over voltage protection monitors the voltage of the FB-pin.

LM5177

SNVSBU4F – JUNE 2022 – REVISED JANUARY 2025

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LM5177DCPR Datasheet(PDF) 30 Page - Texas Instruments