STMicroelectronics STLUX383A

Overview

STLUX383A from STMicroelectronics is a digital lighting and power conversion controller integrating an STM8® core, six SMED-based programmable PWM generators (1.3 ns resolution), DALI 2.0-compliant hardware interface, four 50 ns analog comparators, and a 10-bit ADC with op-amp gain options. It targets high-precision LED driver and resonant SMPS control where event-driven timing and bus-level lighting interoperability are critical.

For engineers reviewing the STLUX383A datasheet, STLUX383A pinout, STLUX383A application, or STLUX383A equivalent, this device is evaluated for DALI slave implementation, zero-current detection in LLC/PFC topologies, multi-channel synchronous rectification, and adaptive dimming algorithms requiring sub-10 ns event response.

Technical Context

The STLUX383A implements six autonomous SMED (State Machine Event Driven) units-each configurable as independent or coupled PWM generators-with native 10.4 ns event reaction and dithered 1.3 ns PWM resolution. Its DALI peripheral provides interrupt-driven, IEC 62386-compliant encoding/decoding at 1.2–4.8 kHz with configurable noise filtering and reverse-polarity tolerance on Tx/Rx lines.

Four analog comparators deliver <50 ns propagation delay with internal 4-bit references and one external reference input; the 10-bit ADC supports 8-channel sequencing, 1 MΩ input impedance, and programmable x1/x4 gain-enabling direct current-sense amplification without external op-amps. The integrated STM8 core runs at up to 16 MHz and manages SMED configuration, DALI protocol stack, and system supervision.

Key Specifications

Pinout & Package

STLUX383A is housed in a TSSOP38 package (38-pin thin shrink small outline package) with 0.65 mm pitch, optimized for thermal dissipation and PCB layout density in compact LED drivers and SMPS modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital lighting and power conversion controller applications.

Compared with STLUX385A and STLUX325A, the STLUX383A uniquely balances full DALI 2.0 hardware support, six SMED outputs, and TSSOP38 packaging-making it optimal for space-constrained, standards-compliant LED drivers where I²C is not required and external DALI transceivers must be avoided.

Availability

STLUX383A is available at Aetrix Electronics and suitable for LED dimmable ballast control, PFC + resonant LLC combo power supplies, and multi-channel synchronous rectifier designs requiring stable component supply, long-term lifecycle assurance, and industrial temperature operation.

Supply support for STLUX383A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, and analog/mixed-signal devices for industrial, automotive, and consumer markets.

The STLUX family is engineered specifically for digital lighting and power conversion systems-delivering deterministic, event-driven PWM control and standardized lighting bus interfaces in a single-chip solution.

FAQ

Does STLUX383A support DALI version 2.0 and IEC 62386-102?

Yes, STLUX383A integrates a hardware DALI peripheral compliant with IEC 62386-102 (DALI-2 slave) and supports the 24-bit extended frame format. It operates at 1.2, 2.4, or 4.8 kHz bus frequencies and includes configurable noise rejection filtering and reverse-polarity tolerant Tx/Rx lines-no external transceiver or firmware stack required.

What is the minimum detectable event pulse width for SMED inputs?

The SMED subsystem guarantees event detection and reaction within 10.4 ns, meaning it reliably captures external digital pulses as narrow as 10.4 ns. This is validated by ST's characterization under worst-case voltage and temperature conditions and enables precise zero-current switching detection in high-frequency resonant converters.

Can the integrated ADC measure both voltage and current simultaneously across multiple channels?

Yes-the 8-channel ADC sequencer can cycle through configured inputs (e.g., shunt voltage, rail voltage, temperature sensors) in automatic mode without CPU intervention. Each conversion is 10-bit with optional x1/x4 programmable gain, and the integrated op-amp allows direct amplification of low-level current-sense signals before digitization.

Is SWIM debugging supported in all power modes including active halt?

Yes, the Single Wire Interface Module (SWIM) remains fully functional in all operating modes-including Active Halt-allowing real-time register inspection, memory read/write, and breakpoint setting without disrupting SMED autonomous operation or DALI bus activity. Debugging occurs at up to 145 byte/ms with hot-plug capability.