ST STM32F071CB 75W数控恒流LED驱动器参考设计

ST公司的STM32F071x8/xB MCU是基于ARM的32位MCU,集成了高达128KB闪存,12个计时器,ADC,DAC和通信接口.STM32F071x8/xB MCU具有高性能ARM® Cortex®-M0 32位RISC核,工作频率高达48MHz,高速嵌入存储器(128KB闪存和16KB SRAM),以及各种增强外设和I/O.所有器件提供标准通信接口(两个I2C,两个SPI/一个I2S,一个HDMI CEC和四个USART),一个12位ADC,一个两个通路12位DAC,七个16位计时器,一个32位计时器和先进控制PWM计时器. STM32F071x8/xB MCU工作温度-40到+85℃和-40到+105℃,工作电压2.0V-3.6V,完整省功率模式允许在低功率应用如应用控制和用户接口,手持设备,A/V接收器和数字TV,PC外设,游戏和GPS平台,工业应用,PLC,逆变器,打印机,扫描仪,告警系统,视频互连和HVAC.本文介绍了STM32F071CB主要特性,时钟树图,电源方案以及评估板STEVAL–LLL004V1主要特性和电指标,框图,电路图,材料PCB设计图.

The STM32F071x8/xB microcontrollers incorporate the high-performance ARM® Cortex®-M0 32-bit RISC core operating at up to 48 MHz frequency, high-speed embedded memories (up to 128 Kbytes of Flash memory and 16 Kbytes of SRAM), and an extensive range of enhanced peripherals and I/Os. All devices offer standard communication interfaces (two I2Cs, two SPI/one I2S, one HDMI CEC and four USARTs), one 12-bit ADC, one 12-bit DAC with two channels, seven 16-bit timers, one 32-bit timer and an advanced-control PWM timer.

The STM32F071x8/xB microcontrollers operate in the -40 to +85 ℃ and -40 to +105 ℃ temperature ranges, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications.

The STM32F071x8/xB microcontrollers include devices in six different packages ranging from 48 pins to 100 pins with a die form also available upon request. Depending on the device chosen, different sets of peripherals are included.

These features make the STM32F071x8/xB microcontrollers suitable for a wide range of applications such as application control and user interfaces, hand-held equipment, A/V receivers and digital TV, PC peripherals, gaming and GPS platforms, industrial applications, PLCs, inverters, printers, scanners, alarm systems, video intercoms and HVACs.


• Core: ARM® 32-bit Cortex®-M0 CPU, frequency up to 48 MHz
• Memories
– 64 to 128 Kbytes of Flash memory
– 16 Kbytes of SRAM with HW parity
• CRC calculation unit
• Reset and power management
– Digital and I/O supply: VDD = 2.0 V to 3.6 V
– Analog supply: VDDA = VDD to 3.6 V
– Selected I/Os: VDDIO2 = 1.65 V to 3.6 V
– Power-on/Power down reset (POR/PDR)
– Programmable voltage detector (PVD)
– Low power modes: Sleep, Stop, Standby
– VBAT supply for RTC and backup registers
• Clock management
– 4 to 32 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– Internal 8 MHz RC with x6 PLL option
– Internal 40 kHz RC oscillator
– Internal 48 MHz oscillator with automatic trimming based on ext. synchronization
• Up to 87 fast I/Os
– All mappable on external interrupt vectors
– Up to 68 I/Os with 5V tolerant capability and 19 with independent supply VDDIO2
• Seven-channel DMA controller
• One 12-bit, 1.0 μs ADC (up to 16 channels)
– Conversion range: 0 to 3.6 V
– Separate analog supply: 2.4 V to 3.6 V
• One 12-bit D/A converter (with 2 channels)
• Two fast low-power analog comparators with programmable input and output
• Up to 24 capacitive sensing channels for touchkey, linear and rotary touch sensors
• Calendar RTC with alarm and periodic wakeup from Stop/Standby
• 12 timers
– One 16-bit advanced-control timer for six-channel PWM output
– One 32-bit and seven 16-bit timers, with up to four IC/OC, OCN, usable for IR control decoding or DAC control
– Independent and system watchdog timers
– SysTick timer
• Communication interfaces
– Two I2C interfaces supporting Fast Mode Plus (1 Mbit/s) with 20 mA current sink, one supporting SMBus/PMBus and wakeup
– Four USARTs supporting master synchronous SPI and modem control, two with ISO7816 interface, LIN, IrDA, auto baud rate detection and wakeup feature
– Two SPIs (18 Mbit/s) with 4 to 16 programmable bit frames, and with I2S interface multiplexed
• HDMI CEC, wakeup on header reception
• Serial wire debug (SWD)
• 96-bit unique ID
• All packages ECOPACK®2





The STEVAL–LLL004V1 digitally controlled constant current LED driver features a PFC stage and two DC-DC convertersdesigned to work in transition mode (TM) for optimized efficiency.

The LED driver can deliver 75 W output power and can dim LEDs down to 0.5% maximum brightness level via analog anddigital control, and still retain flicker operation. Testing results show high efficiency, a power factor near unity, and low THD%under wide input voltage and load conditions due to the performance of the ST power products as well as the control strategiesimplemented through the 32-bit STM32F0 series microcontroller.





• Wide input voltage range 85–265 VAC
• Transition Mode PFC
• Two constant current outputs working in transition mode based on different topologies:
– Buck topology
– Inverse buck topology
• Output current: 500 mA ±2.5%
– Number of LEDs connected at output: 16 – 24 white LEDs (3.3 V each)
• PFC > 0.97 and THD < 20% at full load with input voltage 85-265 VAC
• Peak Efficiency at maximum load ≅90%
• Comprehensive safety protections:
– Open/no-load circuit protection
– Short-/overload circuit protection
• Soft start implementation
• LED dimming range: 0.5% to 100%
– Analog dimming
– Digital dimming
• Dimming control options:
– Push button
– 0-10 V input
• Meet IEC55022 Class B
• WEEE and RoHS compliant





图11.评估板STEVAL–LLL004V1电路图:STM32 MCU


图13.评估板STEVAL–LLL004V1 PCB设计图:顶层丝印和打孔图

图14.评估板STEVAL–LLL004V1 PCB设计图:顶层

图15.评估板STEVAL–LLL004V1 PCB设计图:底层丝印和打孔图

图16.评估板STEVAL–LLL004V1 PCB设计图:底层布局



友情链接:足球外围官方网站  澳门美高梅官网_澳门美高梅网址_澳门美高梅网站  足球外围官方网站  贵宾厅集团_澳门赌场  澳门新濠天地平台官网  澳门威尼斯人网站_澳门威尼斯人网址  电子游戏官网|网址  澳门葡京赌场官网  澳门赌场_官网VIP专线  澳门赌场官网|网址网站  游艇会官网  金沙官网赌场|赌场网址  永利赌场_澳门网站  澳门太阳城|官网  澳门老葡京_老葡京赌场  北京PK10计划-官网注册  真人游戏官方网站_赌场官网  澳门银河官网  MG电子游戏-官方网站  365bet体育在线网投|365bet体育在线官网  游艇会网址_游艇会网站  澳门金沙网址  澳门老虎机|官方V认证  澳门真钱赌场网站  皇冠体育-澳门皇冠网投  澳门银河官网-澳门银河网站-澳门银河网址  MG电子游戏官网  MG电子游戏官网  足球买球盘口网站_外围网址  澳门娱乐赌场网站_澳门赌场手机网站_澳门赌场