Synchronous Flyback Controller with Integrated Feedback & Digital Isolator

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The KTB1095 is a highly integrated isolated synchronous flyback controller with internal feedback and an integrated digital isolator. The internal digital isolator eliminates the need to use an external optocoupler and enables small total solution size. The device operates over a wide input voltage range from 5V to 80V to support a variety of applications.

The KTB1095 employs current-mode PWM control with constant on-time (COT) for fast transient response as well as superior output voltage regulation. The device features an adjustable soft-start function to limit inrush current during start-up. The device has built-in protection features including input voltage UVLO, output over-voltage-protection (OVP), cycle-by-cycle current limit, short-circuit protection and thermal shutdown. The KTB1095 is available in RoHS and Green compliant SOP-16 package.


  • Wide VIN Range: 5V to 80V
  • Integrated Feedback and Digital Isolator
  • Internal Startup Regulator
  • Integrated Driver for Synchronous Rectifier MOSFET
  • ±1.5% Feedback Voltage Reference
  • 8V Primary Driver with 1A / 2A Source / Sink Current Capability
  • 9V Secondary Driver with 2A / 3A Source / Sink Current Capability
  • 3000V-rms Isolation
  • Frequency Adjustable From 100kHz to 700kHz
  • Adjustable Soft-Start Time
  • Optional Primary Side Bias for Optimized Efficiency
  • Built-in Cycle-by-Cycle Current Limit, Input UVLO, Over Current Protection, Short-Circuit Protection, and Thermal Shutdown Protection
  • SOP-16 Wide Body (10.3mm x 7.5mm)
  • -40°C to 125°C Operating Junction Temperature Range
  • Safety Certifications: UL1577


  • Telecom and Communications Power Systems
  • Industrial PLCs, Smart Meters
  • Power-Over-Ethernet (PoE)
  • Bias supply for isolated DC-DC converters
  • Low power isolated power modules
  • Battery Management System (BMS) in EVs

Packaging Information

Package Dimensions Bumps Package Code
SOP-16 (10.30mm x 7.50mm x 2.65mm) 16 SOP-16

Technical Documentation

Description Documents Type


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