40W Single-Voltage Non-Isolated Two-Stage Iron-Cased Power Supply _ Floating Ground
LED Lighting
- 40W Single-Voltage Non-Isolated Two-Stage Iron-Cased Power Supply _ On-Site
- 50W single-voltage non-isolated low PF large bulb
- 9W Indian high PF emergency lighting
- 200W full-voltage non-isolated low PF floodlight
- 40W full-voltage non-isolated low PF aluminum substrate driver
- 40W Single-Voltage Non-Isolated Two-Stage Iron-Cased Power Supply _ Floating Ground
- According to the maximum output voltage limitation requirements in the safety standard IEC61347-2-13 for LED driver power supplies, for non-isolated drivers, the effective voltage from the output to the casing needs to be measured. When the front stage has a PFC and is used in an on-site application in the rear stage, the effective value of the positive output to the casing is the superposition of the alternating current effective value of the negative output to the casing and the direct current voltage. Therefore, it will exceed the declared maximum direct current output voltage. However, when the front stage has a PFC and the rear stage is used in a floating ground application, both the positive and negative outputs to the casing only have alternating current effective values. Therefore, European standard LED driver power supplies should adopt a floating ground architecture. Our company has now launched the corresponding product series YT2273XE for this architecture. - Two-stage solution of boost APFC (based on YT8110FES8) + buck BUCK (based on YT2273HEE5). Power factor (PF) > 0.95, total harmonic distortion (THD) < 10%. - Both the front stage and the rear stage integrate high-voltage start-up and power supply circuits. Under full load conditions, the start-up time is less than 10 ms. - Operating in quasi-resonant mode: high efficiency and good EMC performance. - Excellent line regulation: less than 1%. - Excellent load regulation: less than 2%. - Both the front stage and the rear stage support applications without auxiliary windings: the inductor manufacturing process is simple and the cost can be controlled. - Linear current reduction under over-temperature conditions: improving system reliability. - Complete protection functions: including output open-circuit protection, short-circuit protection, over-temperature protection, etc.
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