Calculation tool
SLUC222 — UCC2895x Excel Design Tool
Excel based calculator to design a PSFB power supply
UCC28951
Green phase-shifted full-bridge controller with SR control for Wide input voltage Range
Data sheet
UCC28951
- Enhanced zero-voltage switching (ZVS) range
- Direct synchronous rectifier (SR) control
- Light-load efficiency management including:
- Burst mode operation
- Discontinuous conduction mode (DCM), dynamic SR on/off control
- Average- or peak-current mode control with programmable slope compensation and voltage-mode control
- Closed-loop soft-start and enable function
- Programmable switching frequency up to 1 MHz with bidirectional synchronization
- (±3%) cycle-by-cycle current limit protection with hiccup mode support
- 150µA start-up current
- VDD undervoltage lockout
- Wide temperature range: –40°C to +125°C
The UCC28951 controller is an enhanced version of the UCC28950. It is a fully compatible drop-in replacement for the UCC28950. The UCC2895x devices use advanced control of the full-bridge in addition to active control of the synchronous rectifier (SR) output stage.
ZVS operation ensured over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side synchronous rectifiers(SR). This functionality maximizes overall system efficiency.
Easily get started with the UCC2895x 600W phase shifted full bridge design review/application note,
The 24-pin, TSSOP package complies with RoHS requirements.
Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC2895x Phase-Shifted Full-Bridge Controller for Wide-Input Voltage Range Applications datasheet (Rev. B) | PDF | HTML | 17 Oct 2024 |
| Application note | UCC28950 600W Phase Shifted Full Bridge Design Review/Application Report (Rev. D) | PDF | HTML | 04 Mar 2022 | |
| Application note | Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 | 13 Nov 2017 | ||
| EVM User's guide | Using the UCC27714EVM-551 for Evaluating the UCC28951-Q1 | 06 Oct 2016 | ||
| More literature | Design review of a 2-kW parallelable power supply module | 17 Aug 2016 | ||
| More literature | Design review of a 2-kW parallelable power supply module (PPT) | 17 Aug 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
UCC27714EVM-551 — UCC27714 600W Phase Shifted Full Bridge Converter Evaluation Module
This 600W EVM was designed to demonstrate how the UCC28950 control IC, UCC27524A and UCC27714 gate drivers could be used in a phase shifted full bridge converter that achieves ZVS from 50 to 100% load.
User guide: PDF
Simulation model
UCC28950 and UCC28951 PSpice Transient Model (Rev. C)
SLUM169C.ZIP (168 KB) - PSpice Model
Simulation model
UCC28950 and UCC28951 TINA-TI Startup Reference Design (Rev. A)
SLUM276A.TSC (738 KB) - TINA-TI Reference Design
Simulation model
UCC28950 and UCC28951 TINA-TI Steady State Reference Design (Rev. A)
SLUM277A.TSC (739 KB) - TINA-TI Reference Design
Reference designs
PMP8740 — 2-kW industrial AC/DC battery charger reference design with 92% full-load efficiency
This reference design is a module that can be set as standard power supply or a battery charger. The output voltage ranges from 0 V to 32 V at a maximum current of 62.5 A. It consists of four boards, a boost PFC, a phase shift full bridge, a small daughter board (hosting the microcontroller), and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 24 | Ultra Librarian |
Ordering & quality
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- Lead finish/Ball material
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- MTBF/FIT estimates
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Information included:
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Support & training
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