QW2889F Datasheet Summary
Emergency Lighting Driver
General Description
Package Reference
QW2889F is a LED driver designed for Emergency Lighting. The QW2889F employs patent protected main line detecting methodology to control and drive the emergency lighting system, without any peripheral ponents. The QW2889F can drive an LED load directly or to enable a boost circuitry, while the AC input main line could be 85-265Vac.
With Patented AC main line detection, the N or L line is patible in QW2889F system. QW2889F integrates a precise single lithium-ion /polymer battery management functional blocks to protect the lithiumion/polymer battery, including Over Charge Protection, Over Discharge Protection.
QW2889F output current in emergency state could be dimmable according the switch ON/OFF delay time.
QW2889F can deliver directly output current. QW2889F is available in SOP-8 package.
Applications
- Emergency lighting
- Stand-by Lighting
Features
- Simplified application circuitry
- AC main line detecting directly
- 85-265Vac Input
- EN PIN drive LED load directly
- Integrated single lithium-ion/polymer management and protection
- Dimmable in DC mode
- L/N Mixing battery
2021-11 http://.sinceretekmicro.
应急灯专用检测芯片
概述
管脚封装
QW2889F 是一款应急检测控制专用芯片。芯片采用专 利的高压隔离和检测技术，无需任何外围元件直接监测 交流输入信号状态，并直接或间接驱动 LED 灯串。同时支 持全电压 85-265Vac 输入。
QW2889F 集成了高精度单节锂电池管理及 0V 电池充 电功能，具有过充保护、过放保护功能。
QW2889F EN 端支持串联限流电阻来直接驱动单串 LED，同时也支持外接升压电路来驱动多串 LED。
QW2889F 采用专利技术, 在多灯并联应用的情况下， LED 灯具不需要区分零火线。同时芯片还具有应急模式下 调光功能。
QW2889F 采用符合 ROHS SP-8 封装，工作温度范围40 度至 105 度。
特性
应用
- 全并全亮 LED...