Overview
The STLUX385ATR is a digital controller from STMicroelectronics, designed for lighting and power conversion applications. It belongs to the STLUX family, which has been successfully integrated into various architectures, including simple buck converters, boost converters for power factor corrections, half-bridge resonant converters, and full bridge controllers for HID lamp ballasts. The STLUX385ATR is optimized for high-performance and reliability in lighting systems, such as LED, HID, and fluorescent applications, with advanced features like programmable PWM generators and DALI interface compliance.
Key Specifications
| Specification | Details |
|---|---|
| Package | TSSOP38 |
| Pin Count | 38 |
| SMED Numbers | Up to 6 |
| SMED PWM Output Pins | 6 |
| Fast Digital Input Pins | 6 |
| Analog Comparators | 4 (with internal 4-bit references and 1 external reference) |
| ADC Channels | Up to 8 channels, 10-bit precision (extendable to 12-bit with operational amplifier) |
| Microcontroller | Advanced STM8 core with Harvard architecture and 3-stage pipeline, max. fCPU: 16 MHz |
| Memories | 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
- Programmable PWM Generators (SMEDs): Up to 6 SMEDs with 10 ns event detection and reaction, max. 1.3 ns PWM resolution, and single, coupled, or two coupled operational modes.
- DALI Interface: Interrupt driven hardware encoder, bus frequency of 1.2, 2.4, or 4.8 kHz, IEC 60929 and IEC 62386 compliant, and configurable noise rejection filter.
- Analog Comparators: Four independent fast analog comparators with internal 4-bit references and one external reference, less than 50 ns propagation time.
- ADCs: Up to 8 channels, 10-bit precision, with operational amplifier to extend resolution to 12-bit equivalent, and sequencer functionality.
- Integrated Microcontroller: Advanced STM8 core with Harvard architecture and 3-stage pipeline, max. fCPU: 16 MHz, and multiple low power modes.
- Communication Interfaces: UART asynchronous with SW flow control and boot loader support, I2C master/slave with fast-slow speed rate.
- GPIO and Peripherals: GPIO with highly robust design, fast digital input DIGIN with configurable pull-up, system and auxiliary timers, watchdogs, and auto-wakeup timer.
Applications
- Smart Lighting: LED, HID, and 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 STLUX385ATR?
The STLUX385ATR is a digital controller designed for lighting and power conversion applications, featuring programmable PWM generators and a DALI interface.
- How many SMEDs are available in the STLUX385ATR?
Up to 6 SMEDs (State Machine Event Driven) are available.
- What is the maximum PWM resolution of the SMEDs?
The maximum PWM resolution is 1.3 ns when using SMED dithering.
- Is the STLUX385ATR compliant with any specific lighting standards?
Yes, it is compliant with IEC 60929 and IEC 62386 standards for DALI interface.
- What types of analog comparators are included in the STLUX385ATR?
Four independent fast analog comparators with internal 4-bit references and one external reference.
- What is the resolution and gain of the ADCs in the STLUX385ATR?
The ADCs have a 10-bit precision, with an operational amplifier to extend the resolution to 12-bit equivalent, and configurable gain values of x1 and x4.
- What is the maximum frequency of the integrated microcontroller?
The maximum frequency of the STM8 core is 16 MHz.
- What are the memory specifications of the STLUX385ATR?
32 Kbytes Flash, 1 Kbyte true data EEPROM, and 2 Kbytes RAM.
- What communication interfaces are supported by the STLUX385ATR?
UART asynchronous with SW flow control and boot loader support, and I2C master/slave with fast-slow speed rate.
- What is the operating temperature range of the STLUX385ATR?
The operating temperature range is -40 °C to 105 °C.
