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UCC25661EVM-128

UCC25661 evaluation module

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UCC25661EVM-128

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Overview

The UCC25661 evaluation module (EVM) assists designers to evaluate the operation and performance of the UCC25661x LLC Resonant controller (16-pin SOIC package with removed pins for high voltage clearance). This evaluation module demonstrates how UCC25661x controls the LLC resonant half bridge DC-DC converter to achieve high efficiency through out the load and input voltage range.

Features
  • IPPC controlled (Input power proportional control) LLC resonant half-bridge DC-DC power conversion
  • DC line input from 365VDC to 410VDC
  • AC input voltage from 85VDC to 265VAC
  • Regulated 12VDC typical output
  • Full-load power of 180W, or full-load current of 15A
  • High efficiency
  • Enhanced light load management:
    • High frequency pulse skip for improved light load efficiency
    • Low frequency burst for reduced standby power
    • Audible frequency range skip for reduced audible noise
    • User option to disable
    • Integrated PFC on/off control signal
    • LF burst soft on/soft off for reduced audible noise
  • Combined resonant current and resonant capacitor voltage sensing through one pin
  • Adaptive dead-time
  • X-capacitor discharge
  • Automatic capacitive region avoidance
  • Adaptive soft start with minimized inrush current
  • Complete sets of protections:
    • Cycle-by-cycle current limit, OCP1 protection
    • Configurable over power protection
    • OVP, internal and external OTP
    • Vin and VCC UVLO
    • Inbuilt 19.5V VCC clamp
  • Test points to facilitate device and topology evaluation
AC/DC & DC/DC controllers (external FET)
UCC25661 — Wide VIN and VOUT 750KHz LLC controller with high-voltage startup
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Evaluation board

UCC25661EVM-128 — UCC25661 evaluation module

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Technical documentation

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Type Title Date
EVM User's guide UCC25661x Half Bridge LLC Evaluation Module PDF | HTML 08 May 2025
Certificate UCC25661EVM-128 EU Declaration of Conformity (DoC) 25 Apr 2025

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