One-chip solution for fluorescent ballast and high-brightness LEDs L6585DE – Energy-saving control IC with integrated PFC STMicroelectronics’ L6585DE for lighting applications integrates all the functions required to ensure correct ballast operation. This combo IC generates more light from less energy, and is compliant with major safety and power consumption regulations. The L6585DE one-chip solution replaces two separate ICs (a PFC and a ballast controller), greatly reducing design time and complexity, lowering costs and providing a flexible solution. High programmability and a wide range of protection features help customers design cost-effective and reliable applications. Key features Main applications Half-bridge section QQ QQ QQ QQ QQ Independently programmable preheating and ignition phases Ignition voltage control with choke saturation detection Half-bridge overcurrent control and hard switching detection Programmable and precise end-of-life (EOL) protection compliant with the two standard ballast configurations PFC section QQ QQ QQ Overvoltage and overcurrent protection Feedback disconnection and choke saturation detection Wide-range mains operation with THD always below 10% www.st.com/lighting QQ T12, T8, T5 lamps and CFLs High-brightness LED power supply Competitive benefits QQ QQ QQ QQ QQ Drives lamps of various types and sizes in series or parallel configuration Maximizes lamp life Increases ballast reliability Generates more light from less energy Provides design flexibility L6585DE The L6585DE is designed using ST’s proprietary 600 V BCD offline technology and is housed in an SO20 package. It integrates a power factor corrector (PFC) , a half-bridge controller and all the appropriate drivers and logic to build electronic ballasts for fluorescent lamps. With to its high programmability, it can drive lamps of different types and sizes, providing a flexible solution. The high level of integration assures optimum internal signal management between the PFC section and ballast controller during the ignition sequence and run mode, and when the lamp fails to ignite. The device embeds features that increase system reliability, ensuring the correct integration of the two sections (PFC and half-bridge controller), in order to protect the ballast in case of external component failure. The PFC section allows the design of a high-performance ballast for wide-range mains operation with an extremely low THD. In this way, a single ballast can support various lamp powers and mains voltages. Furthermore, the application is guarded against PFC overcurrents, overvoltages and choke saturation. With the patented detection circuitry, the device is able to control the aging of the lamp (end-of-life) in both lampto-ground and block capacitor-to-ground configurations. The half-bridge section controls the ballast in all operating modes and protects against overcurrents, choke saturation and hard switching. Embedding the capabilities of multiple circuits, the L6585DE provides high-performance and reliable ballast, reducing component count and board size, and simplifying the design. Besides fluorescent applications, the L6585DE is highly efficient and compact power supply for high-brightness LED applications such as street lighting. L6585DE block diagram Power factor corrector circuit Zero cross detector E/A Bootstrap Vcc undervoltage lockout Level shifter PFC gate driver AC 110 V/220 V High-side gate driver Half-bridge circuit PFC gate driver Control logic protections Multiplier PFC current sense Multiplier Oscillator Timing EOL Evaluation boards Part number Features STEVAL-ILB005V2 1 x 54 W T5 lamp demo board for wide-range mains (110 to 220 V) STEVAL-ILB007V1 2 x 58 W or 2 x 36 W T8 lamp demo board for wide-range mains (110 to 220 V) © STMicroelectronics - February 2010 - Printed in Italy - All rights reserved The STMicroelectronics corporate logo is a registered trademark of the STMicroelectronics group of companies. All other names are the property of their respective owners. For more information on ST products and solutions, visit www.st.com Order code: FL6585DE0210