TI UCC28056CDBVR High Performance Single-Phase Transition-Mode PFC Controller
Shenzhen Mingjiada Electronics, as a globally renowned distributor of electronic components, supplies the TI UCC28056CDBVR high-performance PFC controller, enabling design engineers to achieve power solutions with enhanced energy efficiency and reduced form factor.
【UCC28056CDBVR: High-Performance Power Factor Correction Controller】
The UCC28056CDBVR is a high-performance single-phase transition mode PFC controller employing an innovative hybrid mode approach to drive the PFC boost stage.
Operating in Transient Mode (TM) at full load, the UCC28056CDBVR seamlessly transitions to Discontinuous Conduction Mode (DCM) during load reduction, automatically lowering the switching frequency.
Employing burst mode operation, the UCC28056CDBVR further enhances light-load performance, enabling systems to meet stringent energy standards without requiring PFC shutdown.
This PFC controller drives PFC power stages up to 300W, ensuring low-distortion sinusoidal line input current with a power factor approaching unity.
【Technical Features and Performance Advantages of the UCC28056CDBVR】
The UCC28056CDBVR incorporates multiple outstanding technical features that enable exceptional performance in power supply designs:
Ultra-low no-load input power: Achieves <80mW standby power at 230V, delivering excellent performance in PFC+LLC systems
Multi-mode control: Utilises a hybrid TM and DCM control scheme to achieve outstanding light-load efficiency across a wide load range
Low system cost design: Eliminates the need for a secondary winding on the boost inductor through FET drain valley synchronous conduction
Wide operating voltage range: VCC operates from 8.5V to 34V, suitable for diverse application scenarios
Low start-up current: Consumes less than 46μA during start-up, reducing system power consumption
Comprehensive protection features: Provides cycle-by-cycle current limiting, independent output overvoltage protection, and overtemperature protection
【UCC28056CDBVR Technical Principle Deep Dive】
The UCC28056CDBVR employs an advanced hybrid-mode control strategy, driving the PFC boost stage to operate in transition mode at full load while automatically switching to discontinuous conduction mode during light load conditions.
This adaptive switching mechanism ensures sustained high efficiency across the entire load range.
The UCC28056CDBVR further integrates Burst Mode operation to optimise light-load performance.
In this mode, the device soft-enters and soft-exits burst cycles, achieving ultra-low audible noise output. This enables systems to meet stringent efficiency standards without disabling the PFC.
Its enhanced error amplifier design delivers rapid load step response without compromising input current distortion.
The user-adjustable valley delay function ensures true valley switching, optimising switching timing and reducing switching losses.
These technical features collectively enable the UCC28056CDBVR to drive PFC power stages up to 300W, ensuring low sinusoidal line input current distortion and a power factor approaching unity.
【UCC28056CDBVR Application Areas】
The UCC28056CDBVR is suitable for power supply designs in diverse electronic equipment, including:
Computers and Consumer Electronics: Desktop computers, digital televisions, gaming consoles, set-top boxes, and AC adapter front ends
Lighting Systems: LED drivers and luminaire power management
Industrial and Medical Equipment: Industrial power supplies, medical power supplies, electric bicycle chargers, power tool chargers
When paired with the LLC controller UCC256403/4 and dual synchronous rectifier controller UCC24624, the UCC28056CDBVR achieves system standby power consumption below 80mW, enabling a permanently active PFC architecture.
This design eliminates the need for auxiliary converters. Combined with FET drain-valley conduction and a simple boost inductor, it minimises component count and reduces system cost.
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