AS-DY7401 Li-ion LED Emergency Driver 5W 180 min

The AS-DY7401 is a slim, split-type LED emergency driver built for luminaires where internal space is tight. It combines MCU-based constant power control with a separate, replaceable Li-ion battery pack, so a standard luminaire can be converted to emergency operation without redesigning the housing. With an automatic output range of 10-280V DC and a recommended operating window of 30-220V DC, the AS-DY7401 covers the voltage requirements of most LED boards used in panel lights, batten lights, T5/T8 tubes, downlights, high bays and DOB or linear fixtures.

Constant power output with automatic voltage adaptation

Instead of a fixed output voltage, the AS-DY7401 regulates emergency power at 5W (8W max) and delivers 17-500mA. The MCU samples the load and adapts the output automatically across 10-280V DC, so one driver can be stocked for many different LED boards. There is no voltage selector switch and no need to match a separate driver to each board. The unit accepts 85-265Vac at 50/60Hz, keeps standby input power low, and recharges the battery at 200mA (220mA max) within 24 hours. Emergency duration is 180 min at rated output.

Replaceable Li-ion battery pack and mounting options

The battery is a separate unit, not sealed inside the driver. The AS-DY7401 uses a Li-ion 7.4V 2.2Ah pack with a cycle life of at least 500 cycles at 0.5C charge/discharge and 25°C, measured to 80% of initial capacity; replacement is recommended every 3 years. Charging enters balanced mode at 8.40 ± 0.1V and cuts off at 8.50 ± 0.01V. Two battery housings are available: a battery pack with mounting box (192 x 31 x 21 mm) and a battery pack with mounting plate (170 x 19 x 20 mm). The emergency driver itself measures 185 x 33 x 25 mm. When the battery reaches end of life only the pack is replaced — the driver and the luminaire stay in place, which reduces maintenance cost over the life of the installation.

Automatic self-test and indicator status

The AS-DY7401 performs a 60 s simulated emergency test every 30 days after initial power-on, and a full 180 min annual test every 52 weeks once the battery has been fully charged for 24 hours. A manual test button forces the monthly test with a 4 s press and the annual test with a 6 s press. The indicator shows charging in red, fully charged in green, real emergency mode (AC cut off) in red, simulated emergency mode as a breathing green light, and a fault as a rapidly flashing red light. If the annual test detects battery voltage below the over-discharge protection threshold, the unit flags severe battery degradation so maintenance staff know the pack must be replaced.

Wiring, protection and compliance

For constant current LED drivers the emergency output connects directly to the LED board; for DOB and linear LED luminaires it connects to the AC input of the LED driver instead. When mains power fails, the unit switches to emergency mode automatically at rated emergency power; when mains power returns, it resumes AC supply and recharges the battery. Protection covers open-circuit and no-load output, short-circuit, over-voltage, over-current, over-temperature, battery over/under-voltage and charging current limiting. The housing is PC, rated IP30 and IK07, Class II, with press terminals for 0.2-0.75 mm2 wire. Operating temperature is 0°C to 45°C. The product is CE and RoHS compliant, with a 3-year warranty on the battery pack and a 5-year warranty on all other parts.

Applications and storage

The AS-DY7401 provides battery backup for emergency lighting in LED panel lights, ceiling lights, batten and linear luminaires, T5 and T8 LED tubes, downlights, high bay lights, LED bulbs and integrated DOB fixtures, in maintained or non-maintained operation — including luminaires installed along an escape route where CE and RoHS compliant emergency equipment is required.

• LED panel lights and ceiling lights
• LED batten lights and linear luminaires
• T5 and T8 LED tubes
• LED downlights and high bay lights
• DOB and integrated LED fixtures

For storage, charge and discharge the battery at least once every six months, keep it disconnected from the circuit when not in use, and store it in a cool, dry place with humidity below 85%. Avoid mechanical shock, fire, disassembly and short circuits; keep the positive and negative terminals insulated. The electrolyte is strongly alkaline and can damage skin and clothing.