应用领域：照明显示

方案类型：芯片级方案

方案概述

LED具有独特的低功耗、不闪烁、定向输出功能，因此非常适合柜台下、门厅、楼梯等处的室内照明，集中阵列还可用于房间照明。LED非常坚固且不易损坏，对于花园走道等室外应用和装饰功能也是一种低成本高效率的解决方案。

特性和优势

Atmel®AVR®AT90PWM微控制器支持DALI标准，可将多个镇流器连接到一个集中式系统，以便更严格地控制光照亮度并节约大量能源。

低成本高效率的设计必须具备灵活性。例如，Atmel解决方案可让您根据专为无线应用设计的全功能单芯片AVR，或具有各种符合标准的收发器选项的普通微控制器，来制定荧光灯照明解决方案。

为了加快面市时间，Atmel提供的开发包附带了评估和调试工具，而镇流器演示工具包附带了可更新的完整 C 代码，以便在微处理器内存中实施高级控制和保护算法。

LED 镇流器

LED镇流器必须为LED提供恒定的电流源。AtmelAT90PWM微控制器拥有内置的硬件解调器、强电流 LED 驱动器和中断选择，因此非常适合 LED 应用。

Atmel AT90PWM微控制器

AT90PWM81 - 8-bit AVR Microcontrollers

Specially designed for lamp ballast and motor control applications, this high-performance Microchip 8-bit AVR® RISC-based microcontroller combines 8KB ISP flash memory, 10-channel advanced PWM, 11-channel 10-bit A/D converter, one 10-bi...

AT90PWM161 - 8-bit AVR Microcontrollers

Specially designed for lamp ballast and motor control applications, this high-performance Microchip 8-bit AVR RISC-based microcontroller combines 16KB ISP flash memory, 10-channel advanced PWM, 11-channel 10-bit A/D converter, one 10-bit D/...

AT90PWM3B - 8-bit AVR Microcontrollers

Specially designed for lamp ballast and motor control applications, the 8-bit AVR RISC-based microcontroller featuring 8Kbytes of ISP read-while-write flash, 512-byte EEPROM, 512-byte SRAM, 10-channel advanced PWM, 11-channel 8-bit ADC, a 1...

AT90PWM2B - 8-bit AVR Microcontrollers

Specially designed for lamp ballast and motor control applications,the 8-bit AVR microcontroller is based on the Microchip AVR enhanced RISC architecture. The device features 8Kbytes of ISP read-while-write flash, 512-byte EEPROM, 512-byte ...

AT90PWM316 - 8-bit AVR Microcontrollers

Specially designed for lamp ballast applications, the high-performance, low-power Microchip 8-bit AVR RISC-based microcontroller combines 16KB ISP flash memory with read-while-write capabilities, 512B EEPROM, 1024B SRAM, 53 general purpose ...

AT90PWM216 - 8-bit AVR Microcontrollers

Specially designed for lamp ballast applications, the high-performance, low-power Microchip 8-bit AVR RISC-based microcontroller combines 16KB ISP flash memory with read-while-write capabilities, 512B EEPROM, 1024B SRAM, 53 general purpose ...

AT90PWM1 - 8-bit AVR Microcontrollers

Specially designed for lamp ballast and motor control applications, this high-performance Microchip 8-bit AVR RISC-based microcontroller combines 8KB ISP flash memory with read-while-write capabilities, 512B EEPROM, 512-Byte SRAM, 53 genera...

【AT90PWM81】

Features:

131 powerful instructions - most single clock cycle execution

32 × 8 general purpose working registers

Fully static operation

Up to 1 MIPS throughput per MHz

On-chip 2-cycle multiplier

Endurance: 10,000 write/erase cycles

Device Overview

Summary

Specially designed for lamp ballast and motor control applications, this high-performance Microchip 8-bit AVR® RISC-based microcontroller combines 8KB ISP flash memory, 10-channel advanced PWM, 11-channel 10-bit A/D converter, one 10-bit D/A converter, one 12-bit high speed power stage controller (with extended PSC2 features) with 16-bit Resolution Enhancement. The device operates between 2.7-5.5 volts.

Additional Features

Advanced RISC architecture

131 powerful instructions - most single clock cycle execution

32 × 8 general purpose working registers

Fully static operation

Up to 1 MIPS throughput per MHz

On-chip 2-cycle multiplier

Data and non-volatile program memory

8Kbytes of in-system programmable program memory flash

Endurance: 10,000 write/erase cycles

Lock bits protection

Optional 2/4Kbytes boot code section with independent lock bits

In-system programming by on-chip boot program

True read-while-write operation

512 Bytes of in-system programmable EEPROM

Four bytes page size

256 Bytes Internal SRAM

On-chip debug support (debugWIRE)

Peripheral features

One 12-bit high speed PSC (Power Stage Controllers with extended PSC2 features)

Non overlapping inverted PWM output pins with flexible dead-time

Variable PWM duty cycle and frequency

Synchronous update of all PWM registers

Enhanced resolution mode (16 bits)

Additional register for ADC synchronization

Input capture

Four output pins and output matrix

One 12-bit high speed PSC (Power Stage Controller)

Auto-stop function for event driven PFC implementation

Non overlapping inverted PWM output pins with flexible dead-time

Variable PWM duty cycle and frequency

Synchronous update of all PWM registers

Enhanced resolution mode (16 bits)

Input capture

One 16-bit simple general purpose timer/counter

10-bit ADC

Up to 11 single ended channels and one fully differential ADC channel pair

Programmable gain (5×, 10×, 20×, 40× on differential channel)

Internal reference voltage

One 10-bit DAC

Three analog comparators with

Resistor-array to adjust comparison voltage

DAC to adjust comparison voltage

One SPI

Three external interrupts

Programmable watchdog timer with separate on-chip oscillator

Special microcontroller features

Low power idle, noise reduction, and power down modes

Power-on reset and programmable brown-out detection

Flag array in bit-programmable I/O space (three bytes)

In-system programmable via SPI port

Internal low power calibrated RC oscillator (8MHz or 1MHz, low jitter)

On chip PLL for fast PWM (32MHz, 48MHz, 64MHz) and CPU (12MHz, 16MHz); PLL source RC & XTAL

Dynamic clock switch

Temperature sensor

Operating voltage: 2.7V - 5.5V

Operating temperature:

-40°C to +105°C or -40°C to +125°C

Operating speed

5V: 16MHz core, 64MHz PLL

3.3V: 12MHz core, 48MHz PLL