Protection & Signal Chain
Guard the supply, keep the signal
Hot-plug and surge protection through to audio, USB and sensor front-ends
Protection devices sit at the point of entry to every voltage-over-voltage, over-current and surge event; signal-chain devices condition, shift, switch and sense on the board. Together they cover the defensive and interface layers of a design.
5.7–28 V
OVP fixed & adjustable
Up to 200 V
Surge (8/20 µs)
4.8 mΩ
Lowest switch RON
500 Mbps
Level-shift data rate
OVP & Surge Protection
Over-voltage protection with current limit and reverse-current blocking (RCB) that clamps or disconnects the load when the input spikes. Variants add adjustable OVP, reversible-voltage protection, moisture detection on the connector, and a BUS_DET output for wired-charge detection.
Representative families: ET9517 / ET9611 (fixed OVP + current limit), ET9930 / ET20125 (ADJ current limit + reverse protection), ET9545 / ET9551 / ET9640 (BUS_DET, moisture, flag), ET9918 (ET reverse protection, RCB + ACK).
Load & Current-Limit Switches
Load switches and current-limit switches with fault flag, reverse-current blocking and auto-discharge — for power sequencing, rail isolation and in-rush control. Ultra-low RON parts minimize drop on high-current rails; adjustable OCP sets the trip point per rail; a 6-channel I²C load switch handles multi-rail sequencing.
Representative families: ET3137 / ET3138 (ultra-low-IQ), ET3164 / ET3164 (6–10 A high-current), ET3166A (6-ch I²C), ET3561 / ET3565 (RCB auto-discharge), ET2016/ET20164 / ET2016 (hi-current limit), ET2095 (OCP + ADJ OCP).
e-Fuses
Programmable electronic fuses with soft-start, adjustable over-current protection and output over-voltage clamp — replacing polyfuses and discrete protection with a resettable, precise part. Latch-off or auto-retry response, blocking-FET control for reverse and back-feed protection.
Representative families: ET20135 (soft-start OCP), ET20170–ET20176 (OV-clamp + blocking-FET, latch-off / auto-retry variants).
LED & Display Drivers
RGB, matrix and constant-current LED drivers plus LCD segment controllers — direct “fun-light” drivers with auto-breathing, high-density constant-current matrix drivers, key-scan matrix controllers, and specialist flash-LED and ToF drivers for camera and depth-sensing.
Representative families: ET6298 / ET6312B / ET6326 (fun-light, auto-breathing), ET6037 / ET6038 (38–36 Ch step dimming), ET6141–ET6144 / ET61128 (constant-current matrix to 144 dots), ET6621–ET6625 LCD controllers, ET90310 (flash-LED), ET75016 (ToF driver).
Interface & Logic
Level shifters, I/O expanders, analog switches and a full 74-series logic library. Translate between 0.8 V and 5 V domains, expand GPIO over I²C/SMBus, route audio, USB and Type-C signals, and finish in logic from single gates to octal buffers and registers.
Representative families: ET5014 / ET2102 / ET2104 (I²C level shift), ET4557 / ET4872 (SIM / SD card), ET4548V / ET4548 (GPIO), ET5248 (PCI), ET74801 (audio / Type-C switch), ET4608 / ET4616 (I/O expander), ET14LVC / AHC / HC series logic.
Amplifiers & Sensing
Operational amplifiers, comparators, voltage references and Hall-effect sensors for the analog front-end. General-purpose, zero-drift, high-bandwidth and 36 V op-amps; 5 V and 36 V comparators; an adjustable shunt reference; and Hall switches from nano-power to dual-output, plus a single-phase motor driver.
Representative families: ET85001 / ET358 (general), ET85501 (zero-drift), ET5702 (250 MHz), ET5902 / ET5853B (36 V), ETQ855ix (automotive), LMV331 / ET8903 (comparators), TL431B (reference), ET3717 / ET3718 / ET3725 (Hall), ET13/20 (motor driver).
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