Key facts
- Brand
- Fairchild
- Model
- FL7930
- Category
- Power Management
- Documents
- 5
- Languages
- EN
- Last added
- 2012-08-01
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FAIRCHILD RD-L012 - FL7930B FLS2100XS FAN7346 in design of LED illumination handbook
This document describes a reference design for LED illumination using FL7930B, FLS2100XS, and FAN7346, including the key features and functions of the main controller.
Read onlineFairchild FL7930 specifications
| Power Rating | 150W |
|---|---|
| Input Voltage | 103V AC |
| Output Current | 1.46A |
| DC-DC Topology | LLC Series Resonant Converter (SRC) |
| Maximum Switching Frequency | 300kHz |
All Fairchild FL7930 documents by type
How to use the product for one specific task, with worked examples.
- Fairchild Semiconductor Design Guideline on 150W Power Supply for LED Street Lighting Design Using FL7930B and FAN7621S 25 p
- Fairchild Semiconductor FL7930 LED Application Design Guide Using BCM PFC Controller 22 p
- Fairchild Semiconductor AN-9732 LED Application Design Guide Using BCM PFC Controller for 200W Lighting System 22 p
Questions answered in these manuals
What controllers are used in the 150W LED street lighting design?
The design uses the FL7930B for active PFC and the FAN7621S for the LLC SRC DC-DC converter.
What is the typical application circuit configuration?
The circuit consists of a CRM PFC converter in the front end and an LLC SRC DC-DC converter in the back end.
What is the main advantage of BCM over CCM?
BCM offers inherent zero-current switching of the boost diodes, which eliminates reverse-recovery losses and allows the use of less expensive diodes.
From: Fairchild Semiconductor FL7930 LED Application Design Guide Using BCM PFC Controller
Does the FL7930 include a startup-without-overshoot feature?
Yes, it includes a startup-without-overshoot feature where an internal proportional gain controller prevents overshoot at startup before an external compensator takes over.
From: Fairchild Semiconductor FL7930 LED Application Design Guide Using BCM PFC Controller
What are the benefits of BCM over CCM for PFC converters?
BCM offers inherent zero-current switching of the boost diodes, which eliminates reverse-recovery losses and permits the use of less expensive diodes without sacrificing efficiency.
How does the FL7930 handle startup without overshoot?
During startup, the feedback loop is controlled by an internal proportional gain controller to prevent overshoot, and an external compensator takes over after an internally fixed transition time.