Overview
The STLUX385A is a digital controller from STMicroelectronics, designed for lighting and power conversion applications. It is part of the STLUX family, which integrates advanced features for managing complex lighting and power systems. The device is equipped with a powerful state machine event-driven (SMED) technology, allowing for the generation and control of high-resolution PWM signals. The STLUX385A also includes a range of peripherals such as analog comparators, ADCs, and communication interfaces, making it versatile for various applications.
Key Specifications
| Specification | Details |
|---|---|
| Package | 38-TFSOP (0.173", 4.40mm Width) |
| Pin Count | 38 |
| SMEDs (PWM Generators) | 6 programmable SMEDs with up to 1.3 ns PWM resolution |
| DALI Interface | IEC 60929 and IEC 62386 compliant, bus frequency: 1.2, 2.4 or 4.8 kHz |
| Analog Comparators | 4 independent fast analog comparators with internal and external reference options |
| ADC | 10-bit successive approximation ADC with 8 multiplexed input channels, gain x1 or x4 |
| Microcontroller | Advanced STM8 core with Harvard architecture, 16 MHz max. CPU frequency |
| Memory | 32 Kbytes Flash, 1 Kbyte true data EEPROM, 2 Kbytes RAM |
| Clock Management | Internal 96 MHz PLL, low power oscillators, clock security system |
| Operating Temperature | -40 °C to 105 °C |
Key Features
- SMED Technology: 6 programmable PWM generators with up to 1.3 ns resolution, autonomous operation, and reaction time as low as 10.4 ns.
- DALI Interface: Hardware encoder for Digital Addressable Lighting Interface, compliant with IEC 60929 and IEC 62386 standards.
- Analog Comparators: 4 fast analog comparators with configurable references and less than 50 ns propagation time.
- ADC: 10-bit successive approximation ADC with 8 multiplexed input channels and configurable gain (x1 or x4).
- Microcontroller: Advanced STM8 core with Harvard architecture, 16 MHz max. CPU frequency, and multiple low power modes.
- Communication Interfaces: UART asynchronous with SW flow control and boot loader support, I2C peripheral.
- Peripherals: System and auxiliary timers, watchdog timers, GPIO with robust design, fast digital inputs.
Applications
- Smart Lighting: LED, HID, Fluorescent applications with dimming capability (PWM and/or LINEAR) and integration with sensors.
- Digital Power Supply (SMPS): PFC control, LLC, Asymmetrical Half Bridge, Fly-back, Full Bridge topologies, and Buck/Boost single/multi channel synchronous rectification.
- High Power Dimmable LED Strings: Half-bridge resonant converters and full bridge controllers for HID lamp ballasts.
Q & A
- What is the primary function of the STLUX385A?
The STLUX385A is a digital controller designed for lighting and power conversion applications, featuring advanced SMED technology for PWM signal generation and control.
- How many SMEDs does the STLUX385A have?
The STLUX385A has 6 programmable SMEDs (State Machine Event Driven) units.
- What is the resolution of the PWM signals generated by the SMEDs?
The PWM signals have a maximum resolution of 1.3 ns when using SMED dithering.
- Is the STLUX385A compliant with any specific lighting standards?
Yes, it is compliant with IEC 60929 and IEC 62386 standards for the DALI interface.
- What types of analog-to-digital conversion does the STLUX385A support?
The device supports single and continuous conversion modes with a 10-bit resolution and configurable gain (x1 or x4).
- What is the maximum CPU frequency of the integrated microcontroller?
The maximum CPU frequency is 16 MHz.
- What are the memory specifications of the STLUX385A?
The device has 32 Kbytes of Flash memory, 1 Kbyte of true data EEPROM, and 2 Kbytes of RAM.
- What are the operating temperature ranges for the STLUX385A?
The operating temperature range is from -40 °C to 105 °C.
- What communication interfaces are available on the STLUX385A?
The device includes UART asynchronous with SW flow control and boot loader support, as well as an I2C peripheral.
- What are some typical applications of the STLUX385A?
Typical applications include smart lighting, digital power supply (SMPS), and high power dimmable LED strings.
