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LED controllers promise faster design cycles

Posted: 04 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:LED? power controller? embedded? microcontroller?

Cypress Semiconductor has released the PowerPSoC family of integrated embedded power controllers that provide a single-chip solution for controlling and driving high-power LEDs.

The family integrates four constant-current regulators and four 32V, 1A MOSFETs with the company's PSoC programmable SoC, which includes a microcontroller, programmable analog and digital blocks, and memory. The result is an end system with fewer components, faster design cycles, lower power consumption and higher reliability. Additional applications include white goods and industrial control.

The PSoC architecture consists of an 8bit MCU, eight programmable digital blocks to serve as timers, counters, pulse width regulators and UARTs; six programmable analog blocks for functions such as amplifiers, ADCs, DACs, filters, and comparators; and 16Kbyte of flash memory.

Other features of the PowerPSoC include up to four programmable hysteretic controllers for controlled current output; four low-side gate drivers with programmable drive strength; a 2MHz switching frequency; and an auxiliary power regulator that provides the ability to power the chip from a single power supply.

The companion software for PowerPSoC, the PSoC Designer development tool, lets designers quickly and efficiently program the controllers for different lighting and power options. It also allows changes late in the design cycle without having to change the circuit board layout.

The CY3268 demonstration kit drives four LEDs in a 2.5-inch x 3.5-inch form factor with basic reprogramming/debugging capability. A PowerPSoC evaluation kit (CY3267) is also available for prototyping. It offers a modular approach with interface for daughter-cards to support multiple applications, multiple protocols and customer-specific daughter cards.

- Richard Nass

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