29 Jan '13, 12am

Microchip's fast analogue dc-dc includes MPU oversight: Microchip has introduced a digitally-controlled analogue...

Microchip's fast analogue dc-dc includes MPU oversight: Microchip has introduced a digitally-controlled analogue...

Microchip has introduced a digitally-controlled analogue dc-dc converter chip for power converters between 50 and 150W, including high current point-of-load converters. Called MCP19111 , both microprocessor and analogue blocks are on the same silicon, and within the analogue block is a complete peak-current-mode buck controller, needing only energy-storage components and power mosfets to complete a PSU. The microcontroller can set all out-of-loop parameters including reference voltage, dead-time, and loop compensation time constants - the latter via digital-to-capacitance and digital-to-resistance converters. It is based around an 8bit PIC12F core "modified with peripheral to suit the application", said Microchip marketing manager Steve Stella. "It doesn't need to be high-performance because it doesn't need to do anything cycle-by-cycle. The hard stuff is done on the analo...

Full article: http://www.electronicsweekly.com/Articles/29/01/2013/5545...

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