Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

8-pin pfc and ballast control ic

A technology of ballast and pin, applied in the field of ballast control IC

Inactive Publication Date: 2007-08-08
INTERNATIONAL RECTIFIER COEP
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

· Critical conduction mode pusher PFC
·Internal PFC overcurrent protection

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 8-pin pfc and ballast control ic
  • 8-pin pfc and ballast control ic
  • 8-pin pfc and ballast control ic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Functional Description: Ballast Control Circuit

[0013] The ballast control circuit 100 includes functions for proper control of all types of fluorescent lamps. These functions include preheat frequency, preheat time, run frequency, ignition voltage regulation, lamp non-discharge protection, lamp removal or open circuit protection, lamp replacement automatic restart and lamp end-of-life protection. The modes or "states" of the control circuit include:

1) UVLO mode

2) Read / set mode

3) Preheating mode

4) Ignition mode

5) Running mode

6) Failure mode

[0014] Refer to the state diagram in Figure 3 for a detailed flow chart between these states.

[0015] UVLO mode(1)

[0016] Undervoltage lockout (UVLO) mode is the state of the circuit (see Figure 2) when the voltage supplied by VCC is below the proper turn-on threshold voltage. In UVLO mode, both the PFC and ballast circuits are disabled and only a minimum number of required functions are enabled. The acti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a fluorescent ballast control integrated circuit (IC) with power factor correction (PFC), and more particularly to a ballast control IC with a low pin count and improved programmability. The invention relates further to control methods performed by the IC.

Description

[0001] Cross References to Related Applications [0001] This application is based on U.S. Provisional Application Serial No. 60 / 661,809 (IR-2943 PROV) filed March 15, 2005 and U.S. Provisional Application Serial No. 60 / 725,706 (IR-2943 PROVII) filed October 12, 2005 application and claiming priority thereof, incorporated by reference. technical field [0002] The present invention relates to a fluorescent lamp ballast control integrated circuit IC with power factor correction (PFC), and more particularly to a ballast control IC with low pin count and improved programmability. The invention also relates to a control method implemented by an IC. Background technique [0003] Background features of ballast control ICs are described in US Patent Nos. 5,545,955; 6,211,623; 6,259,614; 6,617,805 and US Application Serial No. 10 / 875,474 (as permitted), all of which are incorporated by reference. Contents of the invention [0004] The present invention provides PFC, ballast cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H05B41/14
CPCH05B41/298Y02B70/126H05B41/2981H02M1/4225Y02B70/10H05B41/00H05B41/14H05B41/24
Inventor T·J·里巴里希
Owner INTERNATIONAL RECTIFIER COEP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com