High-side switches & controllers FAQs

Glossary: High-side switches & controllers

Alex Bhandari-Young — Mon, 28 Sep 2026 17:47:37 GMT

Definitions for technical terms and acronyms related to HSS & controllers. Term Definition /FLT, /ST Active-low fault-flag output pins that signal a fault condition (open load, short circuit, thermal shutdown, etc.) to the MCU. ...(read more)

HSS & controllers EVM & tools FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:45:25 GMT

Covers the evaluation tools available for HSS devices: the Smart Fuse Configurator GUI/firmware for EVM-based bring-up, and the Excel-based current-limit/junction-temperature calculator for design-time analysis. Device Type Question Answer...(read more)

Smart eFuse & I²T wire protection FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:44:25 GMT

Covers TI's smart eFuse high-side switches, which replicate a melting fuse's I²T (current² × time) response digitally, including how the protection curve is configured. Device Type Question Answer HSS eFuse How does I...(read more)

Device selection — HSS vs HSSC & part comparison FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:43:41 GMT

Covers how to choose between an integrated-FET high-side switch and an external-FET high-side switch controller based on current level and application. Device Type Question Answer HSSC When should I use a high-side switch controller ...(read more)

High-side vs low-side switching FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:42:39 GMT

Explains why automotive and chassis-grounded systems generally require high-side rather than low-side switching, covering ground-shift, shared-return interruption, and shock-hazard considerations. Device Type Question Answer HSS Why ...(read more)

Thermal management & junction temperature FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:41:41 GMT

Covers how to estimate junction temperature using the RθJA/RθJB/ΨJT values, and how Rds(on) temperature drift must be fed back into the thermal budget calculation. Device Type Question Answer HSS How do I estimate jun...(read more)

Extended voltage range FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:40:31 GMT

Clarifies that the ‘extended supply voltage’ rating on HSS datasheets covers transient events only (cold crank, load dump) and is not a nominal continuous-operation rating. Device Type Question Answer HSS What does the 'e...(read more)

SPI interface & CRC FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:39:10 GMT

Other Parts Discussed in Post: TPS274C65, TPS2HCS10-Q1 Covers the SPI communication layer on smart eFuse and other digitally-controlled HSS devices. Device Type Question Answer HSS eFuse How do I calculate the CRC for SPI frames on sm...(read more)

Diagnostics & fault flags FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:37:53 GMT

Other Parts Discussed in Post: TPS2HCS08-Q1 Covers how open-load, short-circuit, and short-to-battery faults are detected and reported, and how to distinguish between fault types on devices with a single shared fault pin versus SPI fault registers. ...(read more)

Protection & fault behavior FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:35:59 GMT

Covers how TI high-side switches and controllers respond to short-circuit, loss-of-ground, and overstress conditions, including thermal shutdown, and the interaction between current limit and FET SOA in controller designs. Device Type Questi...(read more)

PWM operation FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:34:15 GMT

Covers the practical frequency limits and thermal considerations for switching a high-side switch as a PWM output, including why very high frequencies require an external low-side switch instead. Device Type Question Answer HSS What ...(read more)

Load types: resistive, inductive, capacitive, lighting FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:32:03 GMT

Covers device behavior driving different load types including resistive, capacitive, and inductive, as well as specifics for each such as the VDS clamp for inductive turn-off, inrush handling for capacitive and bulb loads, and paralleling chann...(read more)

Inrush current & capacitive loads FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:23:34 GMT

Other Parts Discussed in Post: TPS272C45 Covers the inrush-current-limit feature and dV/dt slew control used to survive the current surge from cold filaments and large capacitive loads, and why the current limit alone should not be relied on as the p...(read more)

Current sensing & current limiting FAQs

Alex Bhandari-Young — Mon, 28 Sep 2026 17:21:13 GMT

Other Parts Discussed in Post: INA228, TPS272C45 Covers value selection and details relating to the current-sense and current-limit device pins (RILIM, RSNS, SNS/CS) on TI high-side switches, including accuracy, temperature drift, and using the sense...(read more)