原标题：基于ST STM32F334C8 AC-DC 2KW On Board Charger数字电源方案

　　解决方案基于ST STM32F334C8设计，集成两级控制，前端采用STM32F334C8单独控制PFC，后端移相全桥PWM ZVS，搭配同步整流整流电路，也由STM32F334C8控制。全数位电源相比传统模拟电源，设计起来会更简单方便，拓扑相较而言更容易设计，效率也会更高。该电源方案输入交流电压90Vac~264Vac，输出直流电压48V DC，最大输出电流可以达到42A，输出功率可达2KW。可用于小型电动共享汽车On Board Charger方案。

　　场景应用图

　　产品实体图

　　展示板照片

　　方案方块图

　　核心技术优势

　　1. 全数字控制，拓扑设计更为灵活。

　　2. CPU为Cortex-M4 32bit，主频高达72MHz。

　　3. 高达12组Timer，其中6组高频16bit HRTIM，频率高达4.6GHz。

　　4. 支持20mA I2C和 SMBus、PMBus等接口。

　　方案规格

　　1. 全数位STM32F334C8的两级控制器，集成PFC和移相全桥PWM ZVS，RS。

　　2. 输入电压90V ac – 264V ac，输出电压48Vdc。

　　3. 功率负载可达2KW。

　　4. 需要ST VIPER27H(12W)提供辅助电源。

　　技术文档

　　【STM32F334C8】

　　Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 64 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　The STM32F334x4/6/8 family incorporates the high-performance Arm® Cortex®-M4 32-bit RISC core operating at up to 72 MHz frequency embedding a floating point unit (FPU), high-speed embedded memories (up to 64 Kbytes of Flash memory, up to 12 Kbytes of SRAM), and an extensive range of enhanced I/Os and peripherals connected to two APB buses.

　　The STM32F334x4/6/8 microcontrollers offer two fast 12-bit ADCs (5 Msps), up to three ultra-fast comparators, an operational amplifier, three DAC channels, a low-power RTC, one high-resolution timer, one general-purpose 32-bit timer, one timer dedicated to motor control, and four general-purpose 16-bit timers. They also feature standard and advanced communication interfaces: one I2C, one SPI, up to three USARTs and one CAN.

　　The STM32F334x4/6/8 family operates in the –40 to +85 °C and –40 to +105 °C temperature ranges from 2.0 to 3.6 V power supply. A comprehensive set of power-saving modes allow the design of low-power applications.

　　The STM32F334x4/6/8 family offers devices in 32, 48 and 64-pin packages.

　　Depending on the device chosen, different sets of peripherals are included.

　　Key Features

　　Core: Arm® Cortex®-M4 32-bit CPU with FPU (72 MHz max), single-cycle multiplication and HW division DSP instruction

　　Memories

　　Up to 64 Kbytes of Flash memory

　　Up to 12 Kbytes of SRAM with HW parity check

　　Routine booster: 4 Kbytes of SRAM on instruction and data bus with HW parity check (CCM)

　　CRC calculation unit

　　Reset and supply management

　　Low-power modes: Sleep, Stop, Standby

　　VDD,VDDA voltage range: 2.0 to 3.6 V

　　Power-on/Power-down reset (POR/PDR)

　　Programmable voltage detector (PVD)

　　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 (up to 64 MHz with PLL option)

　　Internal 40 kHz oscillator

　　Up to 51 fast I/O ports, all mappable on external interrupt vectors, several 5 V-tolerant

　　Interconnect matrix

　　7-channel DMA controller

　　Up to two ADC 0.20 μs (up to 21 channels) with selectable resolution of 12/10/8/6 bits, 0 to 3.6 V conversion range, single-ended / differential mode, separate analog supply from 2.0 to 3.6 V

　　Temperature sensor

　　Up to three 12-bit DAC channels with analog supply from 2.4 V to 3.6 V

　　Three ultra-fast rail-to-rail analog comparators with analog supply from 2 to 3.6 V

　　One operational amplifiers that can be used in PGA mode, all terminals accessible with analog supply from 2.4 to 3.6 V

　　Up to 18 capacitive sensing channels supporting touchkeys, linear and rotary touch sensors

　　Up to 12 timers

　　HRTIM: 6 x16-bit counters, 217 ps resolution, 10 PWM, 5 fault inputs, 10 ext event input, 1 synchro. input,1 synchro. out

　　One 32-bit timer and one 16-bit timer with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input

　　One 16-bit 6-channel advanced-control timer, with up to 6 PWM channels, deadtime generation and emergency stop

　　One 16-bit timer with 2 IC/OCs, 1 OCN/PWM, deadtime generation, emergency stop

　　Two 16-bit timers with IC/OC/OCN/PWM, deadtime generation and emergency stop

　　Two watchdog timers (independent, window)

　　SysTick timer: 24-bit downcounter

　　Up to two 16-bit basic timers to drive DAC

　　Calendar RTC with alarm, periodic wakeup from Stop

　　Communication interfaces

　　CAN interface (2.0 B Active) and one SPI

　　One I2C with 20 mA current sink to support Fast mode plus, SMBus/PMBus

　　Up to 3 USARTs, one with ISO/IEC 7816 interface, LIN, IrDA, modem control

　　Debug mode: serial wire debug (SWD), JTAG

　　96-bit unique ID

　　All packages ECOPACK®2 compliant

　　STM32F334C8 CIRCUIT DIAGRAM

　　STM32F334产品

　　STM32F334C8

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 64 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334C6

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 32 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334K8

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 64 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334R8

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 64 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334K6

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 32-Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334C4

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 16 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334K4

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 16 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer

　　STM32F334R6

Mainstream Mixed signals MCUs ARM Cortex-M4 core with DSP and FPU, 32 Kbytes Flash, 72 MHz CPU, CCM, 12-bit ADC 5 MSPS, comparators, op-amp, hr timer