原标题：Cypress CY8CLED04D01 25W智能LED驱动方案

　　Cypress公司的PowerPSoC 智能LED驱动器系列采用可编程的系统级芯片(SoC)技术,可替代传统的MCU,系统IC和周围的大量分立元件,集成了1A 2MHz 功率FET,滞后控制器,电流检测放大器以及PrISM/PWM调制器,构成了LED功率管理的完整方案.本文介绍了PowerPSoC架构方框图, CY8CLED04D0x逻辑方框图和主要特性,以及多种CY8CLED04D0x LED照明框图,采用CY8CLED04D01的25W智能LED驱动器电路图和材料清单(BOM).

　　PowerPSoC® Intelligent LED Driver

　　The PowerPSoC family incorporates programmable system-on-chip technology with the best in class power electronics controllers and switching devices to create easy to use power-system-on-chip solutions for lighting applications.

　　All PowerPSoC family devices are designed to replace traditional MCUs, system ICs, and the numerous discrete components that surround them. PowerPSoC devices feature high performance power electronics including 1 ampere 2 MHz power FETs, hysteretic controllers, current sense amplifiers, and PrISM/PWM modulators to create a complete power electronics solution for LED power management.

　　CY8CLED04D01主要特性:

　　■ Integrated power peripherals

　　❐ Four internal 32 V low side N-Channel power FETs

　　• RDS(ON)– 0.5m ohm for 1.0 A devices

　　• Up to 2 MHz configurable switching frequency

　　❐ Four hysteretic controllers

　　• Independently programmable upper and lower thresholds

　　• Programmable minimum ON/OFF timers

　　❐ Four low side gate drivers with programmable drive strength

　　❐ Four precision high side current sense amplifiers

　　❐ Three 16-bit LED dimming modulators: PrISM, DMM, and PWM

　　❐ Six fast response (100 ns) voltage comparators

　　❐ Six 8-bit reference DACs

　　❐ Built-in switching regulator eliminates external 5 V supply

　　❐ Multiple topologies including floating load buck, floating load buck-boost, and boost

　　■ M8C CPU core

　　❐ Processor speeds up to 24 MHz

　　■ Advanced peripherals (PSoC® Blocks)

　　❐ Capacitive sensing application capability

　　❐ DMX512 interface

　　❐ I2C master or slave

　　❐ Full-duplex UARTs

　　❐ Multiple SPI masters or slaves

　　❐ Integrated temperature sensor

　　❐ Up to 12-bit ADCs

　　❐ 6 to 12-bit incremental ADCs

　　❐ Up to 9-bit DACs

　　❐ Programmable gain amplifiers

　　❐ Programmable filters and comparators

　　❐ 8 to 32-bit timers and counters

　　❐ Complex peripherals by combining blocks

　　❐ Configurable to all GPIO pins

　　■ Programmable pin configurations

　　❐ 25 mA sink, 10 mA source on all GPIO and function pins

　　❐ Pullup, pull down, high Z, strong, or open drain drive modes on all GPIO and function pins

　　❐ Up to 10 analog inputs on GPIO

　　❐ Two 30 mA analog outputs on GPIO

　　❐ Configurable interrupt on all GPIO

　　■ Flexible on-chip memory

　　❐ 16 K Flash program storage 50,000 erase and write cycles

　　❐ 1 K SRAM data storage

　　❐ In-System Serial Programming (ISSP)

　　❐ Partial Flash updates

　　❐ Flexible protection modes

　　❐ EEPROM emulation in Flash

　　■ Complete development tools

　　❐ Free development software: PSoC Designer™

　　❐ Full featured, In-Circuit Emulator and Programmer

　　❐ Full speed emulation

　　❐ Complex breakpoint structure

　　❐ 128 kBytes trace memory

　　CY8CLED04D01应用:

　　❐ Stage LED lighting

　　❐ Architectural LED lighting

　　❐ General purpose LED lighting

　　❐ Automotive and emergency vehicle LED lighting

　　❐ Landscape LED lighting

　　❐ Display LED lighting

　　❐ Effects LED lighting

　　❐ Signage LED lighting

　　■ Device options

　　❐ CY8CLED04D0x

　　• Four internal FETs with 0.5 A and 1.0 A options

　　• Four external gate drivers

　　❐ CY8CLED04G01

　　• Four external gate drivers

　　❐ CY8CLED03D0x

　　• Three internal FETs with 0.5 A and 1.0 A options

　　• Three external gate drivers

　　❐ CY8CLED03G01

　　• Three external gate drivers

　　❐ CY8CLED02D01

　　• Two 1.0 A internal FETs

　　• Two external gate drivers

　　❐ CY8CLED01D01

　　• One 1.0 A internal FET

　　• One external gate driver

　　• 56-pin QFN package

　　图1.PowerPSoC架构方框图

　　图2.CY8CLED04D0x逻辑方框图

　　图3.CY8CLED04D0x LED照明框图:RGGB色彩混合配置作为浮动负载降压转换器

　　图4.CY8CLED04D0x LED照明框图:RGBA色彩混合驱动外接MOSFET作为浮动负载降压转换器

　　图5.CY8CLED04D0x LED照明框图:单路升压驱动三路浮动负载降压通路

　　采用CY8CLED04D01的25W LED驱动器

　　This reference guide describes a 25 W LED driver design using the CY8CLED04D01 PowerPSoC® device. This design is capable of driving four channels of LEDs (string forward voltage of 18 V typical) at 350 mA. The design is tested for compliance with conducted EMI specification (EN 55022 Class B). Though the reference board is not certified for Underwriters Laboratories (UL) safety compliance, it is designed with due consideration of safety requirements.

　　25W LED驱动器主要特性:

　　1. Input Voltage: 90V - 264V AC

　　2. Input Frequency: 47 - 63 Hz

　　3. Output Power: 25W

　　4. Power Factor: >0.92

　　5. Isolated Design

　　6. PF Controller Switching Frequency: 100 KHz

　　7. Number of LED Channels: 4

　　8. LED Driver Switching Frequency: 800 KHz

　　9. Dimmer Support

　　10. Dimmer signal acquired from seconday side of the flyback inductor

　　11. EMI Compliance: EN55022 Class B

　　25W LED驱动器材料清单(BOM):