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New Digital Signal Controllers

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article image Microchip Technology's new Digital Signal Controllers power next-generation switch-mode power supplies

MICROCHIP Technology Australia Pty Ltd , a leading provider of microcontrollers and analog semiconductors, has announced a family of 16-bit dsPIC Digital Signal Controllers (DSCs) for common, multi-loop switch-mode power supplies (SMPSs) and other power-conversion applications.

The dsPIC30F1010 and dsPIC30F2020/2023 (dsPIC30F202X) DSCs have a high-speed, 1 nanosecond (ns) resolution pulse-width-modulator (PWM) and 2 million samples per second (MSPS), 10-bit analog-to-digital (A/D) converter onboard for low latency and high- resolution control.

The devices are ideal for AC/DC converters, isolated DC/DC power-converters and other power-conversion applications, such as embedded power-supply controllers, power inverters and Uninterruptible Power Supplies (UPSs).

Microchip is a leading supplier of microcontrollers and analog control products to the power- conversion industry. The Company's microcontrollers have long been used in intelligent power supplies for communications, power-sequencing, soft-start and topology control. However, until now, lack of effective solutions has hampered the development of supplies using digital control of the complete power-conversion loop. The dsPIC30F1010 and dsPIC202X DSCs allow designers to implement this type of complete digital control in their products.

The new DSCs enable full control of the power-conversion process via software running on the DSC and through its high-performance integrated peripherals. Designers are no longer limited by analog-control design techniques. Components no longer need to be "oversized" to account for component variation. There is no need to worry about component drift and temperature compensation. Manual tuning at the end of the manufacturing line will be a thing of the past. Fewer product platforms are required to serve a wider range of applications, as they are differentiated through software, rather than hardware. Additionally, new, digital topologies will provide designers with a higher degree of freedom to develop supplies with improved power density and improved cost effectiveness.

Examples of applications that can immediately see cost and performance benefits from the dsPIC DSC SMPS solution include power supplies with multiple outputs, coordinated load sharing, hot-swap capability, output coordination, integrated power factor correction or extensive fault-handling.

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