Calculation tool
SLUC222 — UCC2895x Excel Design Tool
Excel based calculator to design a PSFB power supply
UCC28951-Q1
Automotive green phase-shifted full-bridge controller with SR control for wide input voltage range
Data sheet
UCC28951-Q1
- Qualified for automotive applications
- AEC-Q100 qualified with the following results:
- Device temperature grade 1: –40°C to +125°C ambient operating temperature range
- Device HBM ESD classification level H2
- Device CDM ESD classification level C3B
- 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-Q1 controller is an enhanced version of the UCC28950-Q1. It is a fully compatible drop-in replacement for the UCC28950-Q1. Refer to application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 to determine which controller to use.The UCC2895x-Q1 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-Q1 600W phase shifted full bridge design review/application note,
The 24-pin, TSSOP package complies with RoHS requirements.
Technical documentation
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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
TIDA-01407 — Automotive 400-W, 48-V Battery Input, 12-V Output Power Reference Design
This reference design is an automotive, 400-W, phase-shifted full-bridge converter which generates the 12-V output from a 48-V car battery. The enhanced phaseshifted full-bridge controller implements programmable delays which ensure zero voltage switching (ZVS) over a wide range of operating (...)
Reference designs
PMP20657 — Compact, Efficient Unidirectional 48V to 12V@400W Automotive Power Supply Reference Design
The PMP20657 reference design is a compact, efficient unidirectional 48V to 12V @ 400W power converter. The design is pseudo-isolated to protect 12V loads. The phase-shifted full-bridge topology achieves over 95% peak efficiency. Light-load mode enables <100mW standby power with full (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 24 | Ultra Librarian |
Ordering & quality
Information included:
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- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
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Information included:
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