Overview
The STLUX385A, part of the STLUX family from STMicroelectronics, is a digital controller designed for lighting and power conversion applications. This device is equipped with advanced features such as up to 6 programmable PWM generators, a DALI interface, and integrated analog comparators and ADCs. The STLUX385A is built around the STM8 microcontroller core, which provides a robust and efficient platform for various lighting and power management tasks. The device supports a wide range of applications, including smart lighting, LED drivers, and digital power supplies.
Key Specifications
| Specification | Details |
|---|---|
| Package | TSSOP38 |
| Pin Count | 38 |
| SMED Numbers | 6 |
| SMED PWM Output Pins | 6 |
| Fast Digital Input Pins | 6 |
| Analog Comparators | 4 (with internal 4-bit references and 1 external reference) |
| ADC Input Channels | 8 (10-bit precision, extendable to 12-bit with operational amplifier) |
| Microcontroller Core | STM8 with Harvard architecture and 3-stage pipeline, up to 16 MHz |
| Memories | 32 Kbytes Flash, 1 Kbyte EEPROM, 2 Kbytes RAM |
| Clock Management | Internal 96 MHz PLL, low power oscillators, clock security system |
| Operating Temperature | -40 °C to 105 °C |
| Communication Interfaces | UART asynchronous, I2C master/slave, DALI interface |
Key Features
- Up to 6 programmable PWM generators (SMEDs) with 10 ns event detection and reaction, and up to 1.3 ns PWM resolution.
- DALI interface compliant with IEC 60929 and IEC 62386, with configurable noise rejection filter and reverse polarity on Tx/Rx lines.
- 4 analog comparators with internal 4-bit references and one external reference, less than 50 ns propagation time.
- 10-bit ADC with up to 8 channels, extendable to 12-bit resolution with operational amplifier.
- Integrated STM8 microcontroller with Harvard architecture, 3-stage pipeline, and multiple low power modes.
- GPIO with highly robust design, immune against current injection, and fast digital input with configurable pull-up.
- Communication interfaces include UART asynchronous with SW flow control and boot loader support, and I2C master/slave.
- Internal 96 MHz PLL and low power oscillator circuit for external crystal resonator or direct clock input.
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 using half-bridge resonant converters.
- 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 up to 6 programmable PWM generators and a DALI interface.
- What is the resolution of the PWM generators in the STLUX385A?
The PWM generators have a maximum resolution of 1.3 ns when using SMED dithering.
- What communication interfaces does the STLUX385A support?
The device supports UART asynchronous with SW flow control and boot loader support, I2C master/slave, and a DALI interface.
- What is the operating temperature range of the STLUX385A?
The operating temperature range is from -40 °C to 105 °C.
- How many analog comparators does the STLUX385A have?
The device has 4 analog comparators with internal 4-bit references and one external reference.
- What is the precision of the ADC in the STLUX385A?
The ADC has a 10-bit precision, extendable to 12-bit with an operational amplifier.
- What type of microcontroller core does the STLUX385A use?
The device uses an STM8 microcontroller core with Harvard architecture and a 3-stage pipeline.
- What are the memory specifications of the STLUX385A?
The device has 32 Kbytes of Flash memory, 1 Kbyte of EEPROM, and 2 Kbytes of RAM.
- What are some common applications of the STLUX385A?
Common applications include smart lighting, digital power supplies, and high power dimmable LED strings.
- How does the SMED technology in the STLUX385A work?
The SMED (State Machine Event Driven) technology allows for the generation of PWM signals based on external and internal events, with a reaction time as low as 10.4 ns.
