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UCC256402, UCC256403, UCC256404
S...
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Technical Documents
Tools & Software
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UCC256402, UCC256403, UCC256404
SLUSD90C – JUNE 2019 – REVISED MARCH 2020
UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power
1 Features
1 Optimized low power mode and burst mode algorithm – Burst mode with Soft-ON and Soft-OFF periods – Minimized audible noise at no load and standby – User option to disable burst mode – Opto-coupler low power operation – Efficiency performance exceeds DoE Level VI and EU CoC Tier-2 External Power Supply Standards
Hybrid hysteretic control (HHC) – Best-in-class transient response – Fast exit from burst mode
Robust adaptive dead-time control Integrated high-
voltage gate driver with 0.6 A
source and 1.2 A sink capability Robust capacitive region (ZCS) avoidance
scheme Over temperature, output over
voltage, input
under
voltage protection, three levels of over current protection Integrated high
voltage startup function Active X-capacitor discharge function
2 Applications
SMPS power supply for TV Lighting AC-DC adapter Power tools Medical power supply Multi-functional printer Enterprise and cinema projector PC power supply Gaming console power supply
3 Description
The UCC25640x is a fully featured LLC controller with integrated high-
voltage gate driver. It has been designed to pair with a PFC controller to provide a complete power system using a minimum of external components. The resulting power sy...