AS1434

GreenEdge™ 9-72VDC / 24VAC Quad-output, 2kV-Isolated, Power SoC with two integrated 1.25A regulators and I2C Management

The AS1434 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 AS1434 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 1.25Arms each), the AS1434 is ideal for high-efficiency, low-cost and lower-power designs in <20W range. The AS1434 is available in a 64-pin 9x9 QFN, Reduction of Hazardous Substance (RoHS)-compliant package.

 

Applications

The AS1434 is geared towards use in lower cost, low power sytems that will greatly benefit from the GreenEdge Technology performane, integration, and feature enablement including I2C advanced software programmability for power management and system diagnostics.

  • Surveillance Cameras
  • Access Control and Building Management Systems
  • Automotive Power and Infotainment Systems
  • Industrial Ethernet and Wireless Systems
  • RFID readers
  • Point-of-Sale Terminals
  • Multi-rail Isolated Flyback Power Supplies

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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/1.25A 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
  • Individual output Power-Good management
  • Voltage margining for each output
  • Primary GPIO controlled via Secondary I2C
  • Isolated ADC for primary-side sensor measurements
  • 5V µC-compatible with interrupt on alarm services
  • Programmable watchdog timer

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
     

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Block Diagram

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Documentation

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