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MCU tailored for lighting apps

Posted: 26 Jan 2006 ?? ?Print Version ?Bookmark and Share

Keywords:ST7FLit1xB? microcontrollers? MCU? ST7Lite? STMicroelectronics?

STMicroelectronics (ST) announced the availability of a new series of microcontrollers (MCUs) within the ST7Lite family, offering a choice of 16- and 20-pin packages, 2KB or 4KB of flash memory, and new embedded peripherals. The ST7FLit1xB series is an extension of ST7Lite1 devices, with the addition of an enhanced 12-bit auto-reload timer, fast analog comparator with 16 internal voltage references, and other features.

According to the company, the new products will be of particular interest for lighting applications, including fluorescent, high intensity discharge, LED control and for LCD backlight management. Other uses such as low-end motor control, transition mode power factor correction, uninterruptible power supplies, ovens and induction cookers are said to benefit from the range of advanced embedded peripherals in these low cost devices, enabling applications to be smaller and costs to be lower.

The 12-bit timer in the series includes four independent pulse-width modulated (PWM) output channels with programmable dead time generation, intended for use in half-bridge driving mode in lighting and motor control applications where PWM signals must not be allowed to overlap. The new comparator provides 16 selectable voltage references, and alongside the 10bit ADC with an operational amplifier, is said to make the new series a cost-effective solution for many power applications.

The ST7FLit1xB devices bridge the central features of the ST7Lite family. Twenty-four variants offer different combinations of 2KB or 4KB of flash memory, either 128bytes of data EEPROM or no EEPROM, and a 16-pin or 20-pin SO, DIP or QFN package.

The 20-pin versions of the ST7FLit1xB series are currently in volume production, in both DIP and SO packages. Pricing for the series is between 87 cents and $1.14 for quantities of 25,000.




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