Catalog
6-pin high performance CRM/DCM PFC controller
Key Features
• Ultra-low no-load input power enables < 80-mW standby power at 230 VACin PFC+LLC systemExcellent light load efficiency and high efficiency over wide range of load due to multi-mode TM and DCM controlEnables low system cost through FET drain valley synchronized turn-on which eliminates need for second winding on the boost inductorEnables compliance to green power standards without disabling PFCEuP Lot 6 Tier 2, CoC Ver. 5 Tier 2, Energy Star Ver. 6.1, DoE Level VIBurst mode with soft-entry and soft-exit periods enables ultra-low audible noise outputEnhanced error amplifier, responds rapidly to load steps without degrading input current distortionUser adjustable valley delay ensures valley switchingLow start-up current consumption (<46 µA)Wide VCC range 8.5 V to 34 VCycle-by-cycle current limitSecond independent output over-voltage protectionIntegrated over-temperature protectionCreate a custom design using the UCC28056 device with theWEBENCH®Power DesignerUltra-low no-load input power enables < 80-mW standby power at 230 VACin PFC+LLC systemExcellent light load efficiency and high efficiency over wide range of load due to multi-mode TM and DCM controlEnables low system cost through FET drain valley synchronized turn-on which eliminates need for second winding on the boost inductorEnables compliance to green power standards without disabling PFCEuP Lot 6 Tier 2, CoC Ver. 5 Tier 2, Energy Star Ver. 6.1, DoE Level VIBurst mode with soft-entry and soft-exit periods enables ultra-low audible noise outputEnhanced error amplifier, responds rapidly to load steps without degrading input current distortionUser adjustable valley delay ensures valley switchingLow start-up current consumption (<46 µA)Wide VCC range 8.5 V to 34 VCycle-by-cycle current limitSecond independent output over-voltage protectionIntegrated over-temperature protectionCreate a custom design using the UCC28056 device with theWEBENCH®Power Designer
Description
AI
The UCC28056 device drives PFC boost stages based on an innovative mixed mode method that operates in transition mode (TM) at full load and transitions seamlessly into discontinuous conduction mode (DCM) at reduced load, automatically reducing switching frequency. This device incorporates burst mode operation to further improve light load performance, enabling systems to meet challenging energy standards while eliminating the need to switch off the PFC. UCC28056 can drive a PFC power stage up to 300 W, ensuring sinusoidal line input current with low distortion, close to unity power factor. When used with the LLC controllerUCC256403/4, and dual synchronous rectifier controllerUCC24624less than 80 mW system standby power can be achieved, enabling PFC always on architecture and eliminating the need for an auxiliary converter. This with FET Drain valley turn-on with simple boost inductor allows fewest component count and reduced system cost.
The UCC28056 device drives PFC boost stages based on an innovative mixed mode method that operates in transition mode (TM) at full load and transitions seamlessly into discontinuous conduction mode (DCM) at reduced load, automatically reducing switching frequency. This device incorporates burst mode operation to further improve light load performance, enabling systems to meet challenging energy standards while eliminating the need to switch off the PFC. UCC28056 can drive a PFC power stage up to 300 W, ensuring sinusoidal line input current with low distortion, close to unity power factor. When used with the LLC controllerUCC256403/4, and dual synchronous rectifier controllerUCC24624less than 80 mW system standby power can be achieved, enabling PFC always on architecture and eliminating the need for an auxiliary converter. This with FET Drain valley turn-on with simple boost inductor allows fewest component count and reduced system cost.