UCC28950
Green phase-shifted full-bridge controller with Synchronous Rectification control
UCC28950
- 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.
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Drop-in replacement with upgraded functionality to the compared device
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
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.
UCC28950 and UCC28951 PSpice Transient Model (Rev. C)
UCC28950 and UCC28951 TINA-TI Startup Reference Design (Rev. A)
UCC28950 and UCC28951 TINA-TI Steady State Reference Design (Rev. A)
SLUC222 — UCC28950 Excel Design Tool
Supported products & hardware
Products
AC/DC & DC/DC controllers (external FET)
Hardware development
Evaluation board
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PMP8606 — 300W Full Bridge Phase Shifted (FBPS) DC/DC Power Supply Reference Design
PMP6712 — Dual-channel full-bridge converter reference design (54 V @ 30 A) for PoE power sourcing (PSE)
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
TSSOP (PW) | 24 | Ultra Librarian |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
- Fab location
- Assembly location
Support & training
TI E2E™ forums with technical support from TI engineers
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