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2022-09-24 18:08:59
QW2889LED emergency bulb wick Quanwei zero live wire mixed connection emergency plan
Overview
QW2889 is a special chip for emergency detection and control. The chip uses a patented high voltage
Isolation and detection technology, without any external components to directly monitor the state of the AC input signal,
And directly or indirectly drive the LED light string. Also supports full voltage 85-265Vac input.
The QW2889 integrates high-precision single-cell lithium battery management and MOSFETs. have
Overcharge protection and overdischarge protection.
QW2889 EN terminal supports direct series current limiting resistor to directly drive a single string of LEDs,
It also supports an external boost circuit to drive multiple strings of LEDs.
QW2889 adopts patented technology, in the case of multi-lamp parallel application, LED lamps
The zero line of fire does not need to be distinguished.
The QW2889 is packaged in a ROHS SP-8 package with an operating temperature range of -40°C to
105 degrees.
characteristic
Minimalist application circuit
Accurate AC Input Impedance Detection
85-265Vac full voltage input
EN Direct drive LED load
Perfect battery protection and management
No need to distinguish between zero and live lines
application
All and all bright LED emergency lights
Full string semi-bright LED emergency light
LED emergency light with boost circuit
fire emergency lights