AS1444

GreenEdge™ 9-72VDC / 24VAC Quad-output, 2kV-Isolated, Power SoC with two integrated 2A regulators

The AS1444 is a Quad-Output Digital Power SoCs for 9.5-72VDC & 24VAC isolated power applications. Built around Akros’ integrated GreenEdge 2kV digital isolation technology, the AS1444 is a flexible power platform solution that eliminates all opto-couplers and minimizes component count and design footprint.

Synchronous converters with digital loop and timing control are integrated with digital isolation as part of an advance power system architecture for high-efficiency and cost-effective designs. Spread-spectrum clocking on all PWMs reduces the power supply spectral noise for superior EMC performance. Bi-directional Isolated GPIO eases implmentation of many system-level features in industrial, survieallance, automotive and medical applications.

With two externally-programmable high-current capable outputs (Vout1 and Vout4), and two internal Buck Regulators (Vout2 and Vout3, with 2Arms each), the AS1444 is ideal for high-efficiency, low-cost and higher-power designs in <50W range. The AS1444 is available in a 64-pin 9x9 QFN, Reduction of Hazardous Substance (RoHS)-compliant package.

 

Applications

The AS1444 is geared towards use in lower cost, higher power sytems that will greatly benefit from the GreenEdge Technology performane, integration, and feature enablement, without the need for advanced software programmability.

  • Surveillance Cameras, outdoor and PTZ
  • Access Control and Building Management Systems
  • Automotive Power and Infotainment Systems
  • Industrial Ethernet and Wireless Systems, RFID readers
  • Telecom and Datacom backplane, distributed power systems
  • Multi-rail Isolated Flyback and Forward Power Supplies

^Top

Features

Digitally Isolated Programmable Power

   Primary-Side DC-DC Controller

  • High-efficiency DC-DC Controller with Digital Optimization
  • Integrated Primary-Secondary High-Voltage 2kV Digital Isolation
  • Programmable Primary Clock Frequency

  Secondary-Side Power Outputs

  • Output #1: Sync Controller with programmable power-FET timing for high efficiency at both light and full loads
  • Outputs #2 and #3: Fully integrated Buck Regulators w/2A FETs
  • Output #4: DC-DC Controller for Buck, Boost, or LED Driver
  • High current capability on Outputs #1 and #4
  • Programmable PWM Frequencies

Power Management

  • Hardware-programmable start-up power sequencing
  • Primary GPIO controlled via Secondary GPIO

EMC Compliance and Protection

  • Synchronous spread-spectrum clocking on all PWMs
  • Slew-rate-controlled power drivers
  • Multi-phased PWM clocking, with External Sync clock option
  • Over-current, Under/Over-voltage and Short-circuit Protection
  • Meets UL60950 and UL1577 requirements for basic isolation to 2kVDC/1.5kVRMS
     

^Top

 

Block Diagram

^Top

Documentation

Register or Log-in to MyAkros for more detailed information.