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Ballast control IC eases HID lighting design

Posted: 26 Apr 2010 ?? ?Print Version ?Bookmark and Share

Keywords:ballast control IC? lighting application? gate driver?

IRS2573DS ballast control IC

International Rectifier has developed a full-featured high-intensity discharge (HID) electronic ballast control IC for low-, medium- and high-power general purpose industrial HID applications including retail store spotlights, general outdoor lighting applications and outdoor street lighting.

The IRS2573DS 600V IC combines a high-side, dual-mode buck controller together with a full-bridge driver. The device's novel buck circuitry enables continuous-conduction mode control during lamp warm-up and critical-conduction mode during steady state running. The full-bridge driver includes all high- and low-side gate driver outputs as well as integrated bootstrap MOSFETs for the high-side supply voltages.

"Controlling HID lamp power within an accurate window has traditionally presented a complex design challenge. By offering complete HID electronic ballast system know-how in a chip, the highly integrated, feature-rich IRS2573DS allows companies that already have a market presence in lighting to enter the HID market very rapidly with minimal know-how," said Tom Ribarich, IR's director, lighting systems and applications, energy saving products business unit. "Furthermore, by integrating a large portion of the HID ballast system circuitry into a single device, overall system cost can be greatly reduced," he added.

The IRS2573DS offers a high degree of flexibility and programmability. The device incorporates a state machine for controlling the lamp during various operating modes including ignition, warm-up, running and fault mode, and features a multiplier circuit to accurately measure and control lamp power. Additionally, the IRS2573DS offers comprehensive fault detection and fault timer circuitry to detect open circuit, short circuit, failure to ignite, failure to warm-up, and lamp end-of-life fault conditions, as well as lamp ignition enabler and timer.

Available in a 28-pin SO28-WB package, pricing for the IRS2573DS begins at US $2.50 each in quantities of 10,000-units. The IRPLHID2 reference design costs $248.75 per kit. Production quantities are available immediately. The devices are Pb-free and RoHS-compliant. Prices are subject to change.

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