UCC28951-Q1

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Automotive green phase-shifted full-bridge controller with SR control for wide input voltage range

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Product details

Parameters

Topology Phase-Shifted Full-Bridge Control method Current, Peak Current Mode, Voltage VCC (Min) (V) 8 VCC (Max) (V) 17 Duty cycle (Max) (%) 97 UVLO thresholds on/off (V) 7.3/6.7 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.2 Features Adjustable Switching Frequency, Current Limiting, Enable/Shutdown, Error Amplifier, Green Mode, Light Load Efficiency, Programmable Slope Compensation, SR Logic, Soft Start, Soft Switching, Synchronization Pin, Thermal Shutdown Rating Automotive open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

TSSOP (PW) 24 34 mm² 7.7 x 4.4 open-in-new Find other PWM controllers & resonant controllers

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40ºC to +125ºC 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 With Programmable Threshold
    • Programmable Adaptive Delay
  • 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
  • 150-µA Start-Up Current
  • VDD Undervoltage Lockout
  • Wide Temperature Range: –40°C to +125°C

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Description

The UCC28951-Q1 device is a new enhanced version of the UCC28950-Q1; it is a fully compatible drop-in replacement for the UCC28950-Q1. Reference application note Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 (SLUA853) for choosing the controller to best fit your application. The UCC28951-Q1 implements advanced control of the full-bridge along with active control of the synchronous rectifier (SR) output stage.

Programmable delays ensure ZVS operation over a wide range of operating conditions, while the load current naturally tunes the switching delays of the secondary-side SRs, maximizing overall system efficiency.

The UCC28951-Q1 offers multiple light-load management features including burst mode and dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM) operation.

In addition, the UCC28951-Q1 includes support for current or voltage mode control. Programmable switching frequency up to 1 MHz and a wide set of protection features including cycle-by-cycle current limit, UVLO, and thermal shutdown.

The UCC28951-Q1 is available in 24-pin TSSOP package and is RoHS compliant.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet UCC28951-Q1 Phase-Shifted Full-Bridge Controller for Wide Input-Voltage Range Applications datasheet (Rev. A) Feb. 27, 2018
Application notes PFC Design Choice for On Board Charger Designs May 24, 2018
Application notes Reducing Switching Losses in On-Board Chargers for Electric Vehicles Mar. 27, 2018
Technical articles Hybrid electric vehicles and electric vehicles need different isolated DC/DCs to win Dec. 27, 2017
Application notes Making the Correct Choice: UCC28950-Q1 or UCC28951-Q1 Nov. 13, 2017
Technical articles Are you on-board? Demystifying EV charging systems Jul. 31, 2017
Application notes Gate Driver Design Considerations Oct. 10, 2016
User guides Using the UCC27714EVM-551 for Evaluating the UCC28951-Q1 Oct. 06, 2016
More literature Design review of a 2-kW parallelable power supply module Aug. 17, 2016
More literature Design review of a 2-kW parallelable power supply module (PPT) Aug. 17, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION MODELS Download
SLUM169B.ZIP (153 KB) - PSpice Model
SIMULATION MODELS Download
SLUM276A.TSC (738 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM277A.TSC (739 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLUM278A.ZIP (98 KB) - TINA-TI Spice Model

Reference designs

REFERENCE DESIGNS Download
Compact, Efficient Unidirectional 48V to 12V@400W Automotive Power Supply Reference Design
PMP20657 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive 400-W, 48-V Battery Input, 12-V Output Power Reference Design
TIDA-01407 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 24 View options

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