400KXW27M10X30 overview
400KXW27M10X30 is a component documented by Diodes Incorporated. The PDF description identifies it as "High Power Factor LED Replacement T8 Fluorescent Tube JANUARY 2011." This guide condenses the most useful engineering information from the available PDF so that designers and sourcing teams can identify the checks that still need confirmation in the original document.
Datasheet snapshot
- Manufacturer: Diodes Incorporated
- Part number: 400KXW27M10X30
- Category: IC
- Datasheet length: 12 Pages
Specifications and operating details
The following points were extracted from the PDF text. Check the associated conditions, notes and limits in the complete document before using a value in a design.
- The specifications for the system are: VAC = 230Vac VAC(min) = 85Vac VAC(max)= 264Vac ILED(nom) = 240mA VLED(nom) = 54V VLED(min) = 42V VLED(max) = 59V POUT = 12.96W fswi(nom) = 55kHz Passive factor correction stage design The purpose of t.
- VIN(min) at the minimum AC line voltage Vac(min) is, V602Vac8522V2V ac(min)IN(min) =×=×= At 60Hz, the total time of a half AC line cycle is 8.33ms.
- The valley-fill capacitor value can then be calculated, Fμ30V20 ms77.2V60W96.12 V tV P C DROOP HOLD(min)IN out TOTAL = Therefore, Fμ152C1C == .
- Nevertheless, V DROOP is set to be 20V in the design example to avoid the need for very large valley-fill electrolytic capacitor.
- A 20V V DROOP implies that the bus voltage V IN at the input of buck converter will drop to 40V during part of the AC line cycle.
- As the buck regulator requires V IN to be greater than the LED stack voltage (VLED(max)=59V) for regulation, the LED will be off during part of the AC line cycle.
- Setting the fixed off-time and switching frequency range For fixed off-time operation, the switching frequency will vary subjected to the actual input voltage and output LED conditions.
Engineering review checklist
- Confirm repetitive reverse voltage, average forward current, surge current and leakage at the intended temperature.
- Check forward-voltage loss and reverse-recovery behavior at the actual current and switching frequency.
- Review package thermal resistance, copper area, polarity marking and transient derating before layout release.
Always confirm values against the latest manufacturer-controlled datasheet, especially when qualifying a substitute or releasing a production BOM.
View the complete PDF and model record
Open the 400KXW27M10X30 datasheet and model details to review the complete PDF, document pages and available product information.
Source attribution
Adapted from the PDF associated with this DigiCamel model page.
Source model URL: https://www.digicamel.com/product.php?slug=400kxw27m10x30-diodes-incorporated