The AS1454 integrates GreenEdge isolation technology on silicon to deliver a 92% efficient, space-saving, and cost-effective device for isolated dc-dc power applications, eliminating the need for low-speed, bulky opto-couplers and integrating the function of up to eight separate ICs used in current implementations. The SoC’s built-in cross-isolation dc-dc timing management and digital power control delivers 92% dc-dc efficiency with excellent light-load efficiency management for energy efficient, “green power” applications.
The AS1454 integrates a wide input range (9 to 72 V) isolated primary converter, 2 kV isolation barrier, high-current-capable buck or boost PWM controller, and two 2-A buck regulators into a single device. Its wide-input voltage range allows it to be used in 12 Vdc/24 Vdc/24 Vac distributed power applications in industrial, building management, analog surveillance camera, and automotive systems, as well as 48 V distributed power applications in telecom, datacom, industrial, and medical equipment requiring a 36 to 72 V input voltage range. It offers selectable spread-spectrum clocking on all pulse-width modulators to reduce power-supply spectral noise by more than 15 dB to lower the EMI signature of the switch-mode power supplies and ease system design for EMC compliance.
The AS14x4 product family consists of the AS1454, AS1444, AS1434, and AS1424 devices that cover the gamut of system power and feature requirements.
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