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UCC28056 6-Pin High-Performance CRM/DCM PFC Controller
Texas Instruments' single-phase, transition-mode (TM) PFC controllers are ideal for applications such as desktop computing
Texas Instruments' UCC28056 CRM/DCM PFC controllers drive PFC boost stages based on an innovative mixed-mode method that operates in TM at full-load and transitions seamlessly into discontinuous conduction-mode (DCM) at reduced-load, automatically reducing switching frequency. These devices incorporate burst-mode operation to improve light-load performance. This enables systems to meet challenging energy standards while eliminating the need to switch off the PFC. The UCC28056 can drive a PFC power stage up to 300 W, ensuring sinusoidal line input current with low distortion, close to unity power factor while keeping the PFC ‘always on’. When used with the UCC256301 LLC controller, these 6-pin devices eliminate the need for an auxiliary flyback converter, (typically needed in systems for good standby performance) while achieving less than 80 mW at 230 VAC. The UCC28056 enables instant turn-on while keeping the external component count to a minimum.
- Ultra-low, no-load input power enables < 80 mW standby power at 230 VAC in PFC+LLC system
- Excellent light-load efficiency and high efficiency over a wide range of load due to multi-mode TM and DCM control
- Enables low system cost through FET drain valley synchronized turn-on which eliminates the need for second winding on the boost inductor
- Enables compliance to green power standards without disabling PFC:
- EUP Lot 6 Tier 2, CoC Ver. 5 Tier 2, Energy Star Ver. 6.1, DoE Level VI
- Burst-mode with soft-entry and soft-exit periods enables ultra-low audible noise output
- Enhanced error amp responds rapidly to load steps without degrading input current distortion
- User adjustable valley delay ensures valley switching
- Low start-up current consumption: < 46 µA
- Wide VCC range: 8.5 V to 34 V
- Cycle-by-cycle current limit
- Second independent output overvoltage protection
- Integrated overtemperature protection
- Desktop computing and digital TVs
- Gaming, set-top-boxes, and AC adapter front-end
- LED drivers and luminaries
- Medical power supplies, E-bike chargers, and power tool chargers
UCC28056 CRM/DCM PFC Controllers
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
 |  | UCC28056DBVR | IC PFC CTRLR TRANSITION SOT23-6 | 2312 - Immediate | $1.20 | View Details |
| | UCC28056DBVT | IC PFC CTRLR TRANSITION SOT23-6 | 475 - Immediate | $1.71 | View Details |
|  | UCC28056BDBVT | ISOLATED DRIVER | 960 - Immediate | $1.01 | View Details |
| | UCC28056ADBVT | ISOLATED DRIVER | 846 - Immediate | $1.01 | View Details |
| | UCC28056CDBVT | ISOLATED DRIVER | 0 - Immediate | $1.08 | View Details |
Evaluation Board
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
|  | UCC28056EVM-296 | EVAL BOARD FOR UCC28056 | 1 - Immediate | $178.80 | View Details |
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