R1218 系列
用于白光LED的PWM升压DC/DC转换器

下载数据表

  • 概述

    The R1218 Series are CMOS-based PWM step-up DC/DC converters, which are optimized to drive white LEDs with constant current. R1218 includes an under-voltage lockout circuit (UVLO), over-voltage protection circuit (OVP). By simply using an inductor, a resistor, and a capacitor (, a diode) as external components, white LEDs can be driven with constant current efficiency. R1218Nxx1A for 2 to 4 lights contains an internal diode while R1218Nxx2A for 5 to 7 lights requires an external diode. The LED current can be determined by the value of current setting resistor. The brightness of the LEDs can be adjusted by applying a PWM signal to the CE or VFB pin.

  • 规格
    消费
    输入电压范围 1.8 V to 5.5 V (6.5 V)
    工作温度范围 -40°C to 85°C (125°C)
    电源电流 Typ. 500 µA
    待机电流 Typ. 0 µA
    输出电压范围 Externally Adjustable: Max. 30 V
    反馈电压 Typ. 0.2 V
    反馈电压精度 ±10 mV
    振荡器频率 Typ. 1.2 MHz
    最大占空比 Typ. 91 to 92%
    封装 SOT-23-6

    保护回路/功能

    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • 技术资料
    • R1218N041A Typical Application

      R1218N041A Typical Application

    • R1218N072A Typical Application

      R1218N072A Typical Application

    • R1218N041A Efficiency vs. Output Current

      R1218N041A Efficiency vs. Output Current

  • 品质&封装
    • 有关产品的详细信息,请参见数据表。
    • 封装文件包括封装尺寸,卷带规格,卷带盘尺寸,功耗和建议的焊盘图案。
    • 请联系我们或我们的代理商以获取未发布的可靠性信息。

下载数据表

功能说明

TSD 热关断电路
ILX LX Current Limit Function
OCP 过流保护
OVP 过压保护
UVLO 欠压锁定功能
OVLO Overvoltage Lockout Protection
Reverse 反向电流保护电路
Shutdown 关机功能
Soft Start 软启动功能
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge 自动放电功能
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty 最大占空比
Ext. Phase 外部可调相位补偿
LED Adjust LED High-speed Dimming Control

用以下条件检索类似商品

分类:DC / DC开关稳压器

拓扑结构 Boost
输入电压
min (V)
1.8
输入电压
max (V)
5.5
输出电压
max (V)
30
消费电流
(µA)
500