ADP1071 Synchronous Flyback Controllers with iCoup

By Analog Devices Inc 83

ADP1071 Synchronous Flyback Controllers with iCoup

Power by Linear / Analog Devices’ ADP1071 are pulse-width modulation (PWM) current mode fixed frequency synchronous flyback controllers. These controllers use Analog Devices proprietary iCoupler technology to eliminate the bulky signal transformers and optocouplers that transmit signals over the isolation boundary. Integrating the iCouplers reduces system design complexity, cost, and component count and improves overall system reliability. With the integrated isolators and metal-oxide semiconductor field effect transistor (MOSFET) drivers on both the primary and the secondary side, the ADP1071 offers a compact system-level design and yields a higher efficiency than a diode-rectified flyback converter at heavy loads. Output regulation is achieved by sensing the output voltage on the secondary side, where the feedback and the PWM signals are transmitted between the primary and secondary sides through the iCouplers.

The ADP1071-2 is designed for isolated dc-to-dc applications typically with an input voltage less than 36 V. The ADP1071-1 targets high input voltage applications in which the dc input voltage can exceed 60 V. These controllers offer features such as input current protection, output overvoltage protection (OVP), undervoltage lockout (UVLO), precision enable with adjustable hysteresis, overtemperature protection (OTP), and power saving light load mode (LLM). The ADP1071 comes in a 16-lead SOIC_W package with an isolation voltage rating of 5 kVrms. The ADP1071 is designed for isolated dc-to-dc power supplies found in telecom, industrial, and PoE applications.

  • Integrated 5 kV isolation with Analog Devices, Inc., iCoupler technology
  • Current mode controller for flyback topology
  • Programmable LLM or CCM for high VIN applications
  • Programmable slope compensation
  • Integrated 1 A primary side MOSFET driver
  • Integrated 1 A secondary side MOSFET drivers for synchronous rectification
  • Integrated error amplifier and <1% accurate reference voltage
  • Programmable frequency range: 50 kHz to 600 kHz
  • Duty cycle clamp limit 85%
  • Programmable soft start and soft start from pre-charged load
  • Protection features such as short circuit, output overvoltage, and overtemperature protection
  • Wide voltage supply range
    • Secondary VDD2: up to 36 V
  • Power saving LLM using MODE pin
  • Cycle by cycle input overcurrent protection
  • Precision enable UVLO with hysteresis
  • Frequency synchronization
  • Safety and regulatory approvals (pending)
  • CSA Component Acceptance Notice 5 A
  • Available in 16-lead SOIC_W package
  • UL recognition
    • 5000 Vrms for 1 minute per UL 1577
  • VDE certificate of conformity
    • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
    • VIORM = 849 Vpeak
    • CQC certification per GB4943.1-2011
  • Telecom
  • Industrial
  • Isolated DC to DC
  • AC to DC power conversion
  • PoE powered device
  • Enterprise switches and routers