In this example, the sum of all the losses is 27 mW as a total gate driver loss. For gate drivers that include

bootstrap diode, one should also estimate losses in the bootstrap diode. Diode forward conduction loss is

computed as product of average forward voltage drop and average forward current.

Equation 16 estimates the maximum allowable power loss of the device for a given ambient temperature.

PMAX=TJ−TARθJA

(16)

where

• PMAX = Maximum allowed power dissipation in the gate driver device

• TJ = Junction temperature

• TA = Ambient temperature

• RθJA = Junction-to-ambient thermal resistance

The thermal metrics for the driver package is summarized in the Thermal Information table of the data sheet.

For detailed information regarding the thermal information table, refer to the Texas Instruments application note

entitled Semiconductor and IC Package Thermal Metrics.

www.ti.com

LM2103

SNVSC62A – APRIL 2023 – REVISED AUGUST 2023

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