Key facts
- Brand
- Fairchild
- Model
- FL7730
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-08-01
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FAIRCHILD User Guide for FEB_L20-1 Dimmable LED Bulb at Low Line Using FL7730
This document serves as a user guide for the FEB-L020-1 evaluation board, which demonstrates a dimmable LED bulb solution operating at low line voltages using the Fairchild FL7730 Primary-Side Regulator (PSR) controller. The board is designed to provide a constant current of 380mA at a maximum output voltage of 22V, compatible with traditional TRIAC dimming control.
Read onlineFairchild FL7730 specifications
| Minimum Input Voltage | 90Vrms |
|---|---|
| Maximum Input Voltage | 140Vrms |
| Nominal Input Voltage | 110~120V |
| Nominal Output Current | 380mA |
| Maximum Output Voltage | 28V |
| Power Factor at 110Vac | 0.96 |
| Package Type | SOP-8 |
Source: FAIRCHILD User Guide for FEB_L20-1 Dimmable LED Bulb at Low Line Using FL7730
All Fairchild FL7730 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the maximum recommended switching frequency for the design?
The switching frequency should be less than 65kHz.
From: Fairchild Semiconductor FL7730 Design Tool Flow Application Note
What is the maximum allowed value for the compensation resistor Rec?
Rec should be limited to less than 500 ohm.
From: Fairchild Semiconductor FL7730 Design Tool Flow Application Note
Does this board support TRIAC dimming?
Yes, the FL7730 controller is compatible with traditional TRIAC control.
From: FAIRCHILD User Guide for FEB_L20-1 Dimmable LED Bulb at Low Line Using FL7730
What protections does the FL7730 provide?
It provides open-LED, short-LED, and over-temperature protection.
From: FAIRCHILD User Guide for FEB_L20-1 Dimmable LED Bulb at Low Line Using FL7730
What is the maximum output power for an LED bulb to interact safely with conventional TRIAC dimmers?
An LED bulb consuming less than 20W should interact with those dimmers composed of high-power devices.
From: Fairchild Semiconductor FL7730 Design Guide for TRIAC Dimmable LED Driver
What is the typical range of latching and holding currents for TRIAC dimmers?
The typical range of latching and holding currents is around 5 to 50mA.
From: Fairchild Semiconductor FL7730 Design Guide for TRIAC Dimmable LED Driver