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EETE MAR 2014

AFEs integrate up to eight 24-bit ADCs for multiple load power monitoring The MCP3913 and MCP3914 energy-measurement analog front ends (AFEs) from Microchip Technology integrate six and eight 24-bit, delta-sigma Analog-to-Digital Converters (ADCs), respectively, with 94.5 dB SINAD, -106.5 dB THD and 112 dB SFDR for high-accuracy signal acquisition. The MCP3914’s two extra ADCs enable the monitoring of more sensors with one chip, lowering cost and size. Additionally, the programmable data rate of up to 125 ksps with low-power modes allows designers to scale down for better power consumption or to use higher data rates for advanced signal analysis, such as calculating harmonic content. These AFEs also feature a CRC-16 checksum and register-map lock, for increased robustness. The company also announced two new evaluation boards to aid in the development of energy systems using these AFEs. Both chips come in 40-pin uQFN packages, the MCP3913 adds a 28-pin SSOP package option. Microchip www.microchip.com 2.5A and 4A gate drive optocouplers boost power efficiency Avago Technologies’ latest gate drive optocoupler devices, the ACPL-336J and ACPL-337J, offer a 2.5A and a 4A rail-to-rail output, respectively, capable of driving high power MOSFET or IGBT directly. The devices feature rail-torail output with high current, integrated LED driver, active Miller clamp, high DESAT blanking current source, and Under Voltage Lock-Out (ULVO) feedback control circuit, providing a complete cost-effective gate drive solution for motor control and power inverter applications. The chips come with a wide creepage and clearance of 8.3 mm meeting stringent system level safety regulation. They have 50kV/μs typical high CMR preventing erroneous drive in noisy environment. Avago Technologies www.avagotech.com SUNON Active Cooling Solution for 400W High Power LED Lighting 90% Reduce! Original Cooling Solution (without fan) Sunon Cooling Solution (with fan) Reduce size, weight up to 90% !! Product can meet IP68 & GR487 Rated www.sunon.com info@sunoneurope.com Sunonwealth Electric Machine Industry Co., Ltd. www.electronics-eetimes.com Electronic Engineering Times Europe March 2014 31


EETE MAR 2014
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