8 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification, and TI

does not warrant its accuracy or completeness. TI’s customers are responsible for determining

suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Application Information

The TMP144 devices are typically used to for thermal management of multiple hotspots. The MDA commands

make it easy to manage multiple devices at the same time, which reduces communication time and power. The

WCSP package enables the device to be placed in space-constrained designs and allows the device to have a

fast thermal response.

8.2 Typical Application

Figure 8-1 shows typical connections for TMP144 devices in a daisy-chain configuration.

Figure 8-1. Typical Application With Multiple Devices

8.2.1 Design Requirements

Multiple devices are connected in this typical application. The key design requirements are discussed in the

following sections.

8.2.2 Detailed Design Procedure

8.2.2.1 Trace Length

The maximum trace or cable length between two TMP144 devices can vary because of the effective resistance

and capacitance of the type of cable used in a customer application. Design the trace or cable such that timing

specifications in Timing Diagrams can be satisfied for each TMP144 device in the daisy-chain.

8.2.2.2 Voltage Drop Effect

Take into account the voltage drop that occurs along the supply and ground lines as a result of the currents of all

the devices on the line. This voltage drop occurs as a result of multiple devices simultaneously consuming

current through the combined resistance of the common wire, connectors, and solder contacts. Make sure that

the supply on the last device does not fall below the minimum operating supply of 1.4 V.

www.ti.com

TMP144

SBOS891A – OCTOBER 2018 – REVISED FEBRUARY 2021

Copyright © 2021 Texas Instruments Incorporated

Submit Document Feedback

23

Product Folder Links: TMP144