TI TLC6A598高压大电流8位移位寄存器驱动LED方案

TI公司的TLC6A598是单片高压大电流8位移位寄存器,设计用于需要相对高负载功率如LED的系统.器件包含在输出内置电压钳位,用于感性瞬态保护.功率驱动器应用包括继电器,电磁阀和其它大电流或高电压负载.每个开路漏极DMOS晶体管具有单独的斩波电流限制电路,以防止在短路情况下出现的危险.器件有一个8位串联进并行出的移位寄存器,给8位D型存储存储器提供信息输出是低边开路漏极DMOS晶体管,输出电压50V和连续沉电流350mA.内置的负载开路或短路诊断机制提供了增强的安全保护.器件提供循环冗余检验(CRC)以验证移位寄存器的寄存器值.在回读模式,器件提供6位CRC余数.MCU能回读CRC余数和校验余数是否正确,以确定在MCU和设备间通信回路是否良好.VCC电压从3.3V到5.5V,工作环境温度–55ºC到 +125ºC,8个功率DMOS晶体管输出通路具有350mA连续电流,1.1A限流功能,钳位输出电压50V,低Rds(on)为 1 Ω,平均能量为90mJ(最大).器件的保护包括过流保护,开路和短路负载检测,串通接口通信误差检测,热关断保护.采用24引脚SOIC DW封装.主要用在飞行控制系统,PLC控制和功能指示器,仪表盘,继电器或电磁阀驱动器,电器显示屏以及LED指示和照明.本文介绍了TLC6A598主要特性,功能框图和典型应用电路,驱动LED应用电路和级联应用电路,驱动继电器应用电路以及评估模块TLC6A598 EVM主要特性,电路图,材料清单和PCB设计图.

The TLC6A598 device is a monolithic, high-voltage, high-current power 8-bit shift register designed for use in systems that require relatively high load power, such as LEDs.

The device contains a built-in voltage clamp on the outputs for inductive transient protection. Power driver applications include relays, solenoids, and other high current or high-voltage loads. Each open-drain DMOS transistor features an independent chopping current limiting circuit to prevent damage in the case of a short circuit.

This device contains an 8-bit serial-in, parallel-out shift register that feeds an 8-bit D-type storage register. Outputs are low-side, open-drain DMOS transistors with output ratings of 50 V and 350-mA continuous sink-current capabilities. A built-in load open or load short diagnostic mechanism provides enhanced safety protection. The device...