Calculation tool
UCC28950-Q1
Automotive 8V to 20V full-bridge, phase-shifted PWM controller with synchronous rectification
Data sheet
UCC28950-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.
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Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | UCC2895x-Q1 Automotive Phase-Shifted Full-Bridge Controller for Wide-Input Voltage Range Applications datasheet (Rev. C) | 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 | ||
| 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 | ||
| EVM User's guide | 600-W, Phase-Shifted, Full-Bridge Converter (Rev. A) | 19 May 2010 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
UCC28950EVM-442 — UCC28950 600-W, Phase-Shifted, Full-Bridge Converter Evaluation Module
The UCC28950EVM-442 is a 600-W phase-shifted full-bridge converter that converts a 370 V to 410-V DC input to a regulated 12-V output. This converter was designed to maintain ZVS down to 50% load. This 600-W EVM was designed to demonstrate how the UCC28950 control device could be used in (...)
User guide: PDF
Calculation tool
SLUC222 — UCC28950 Excel Design Tool
Supported products & hardware
Products
AC/DC & DC/DC controllers (external FET)
Hardware development
Evaluation board
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 24 | Ultra Librarian |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Support & training
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