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RT8470

1.2A/1A 磁滞式高亮度 LED 驱动器

RT8470
New

RT8470 是高效率的连续模式开关降压型转压器，设计用于在电源电压高于 LED 电压的情况下驱动单只或多只串联连接的 LED 。其工作电压范围是 7V~30V，采用磁滞控制模式，使用高端电流设定电阻设定输出电流大小。
RT8470 集成了功率开关和高端电流检测电路，可用 PWM 信号或模拟信号实现 PWM 调光输出实现 LED 亮度控制。
RT8470 采用小型 TSOT-23-5 封装和热强化的 SOP-8（含散热焊盘）封装。

应用

  • Automotive LED Lighting
  • High Power LED Lighting
  • Indicator and Emergency Lighting
  • Architectural Lighting
  • Low Voltage Industrial Lighting
  • Signage and Decorative LED Lighting

主要规格

RT8470
Status NRND
Recommended Alternative  RT8471
Vin (min) (V) 7
Vin (max) (V) 30
Vout (max) (V) 26
LED Channels 1
Topology Buck
SW Freq (typ) (kHz) 500
Vcs (typ) (mV) 100
Dimming Control Analog;PWM
Features OCP
Package Type TSOT-25;PSOP-8

关键特性

  • 7V~30V 输入电压范围

  • 高端电流检测，磁滞控制架构

  • 内部集成 350mΩ N-MOSFET

  • 1A 电流输出能力（TSOT-23-5 封装适用）

  • 1.2A 电流输出能力（SOP-8(含散热焊盘）适用）

  • 高达 97% 的效率

  • LED 电流精度：±5% （典型值）

  • 模拟或 PWM 信号调光

  • 300Hz 内置脉动信号发生器

  • 输入欠压锁定

  • 热关机保护

  • 符合 RoHS 规范，不含卤素

Application Notes

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