C2000Ware Digital Power SDK  5.03.00.00
PMP41081 - 1kW 12V Hybrid-hysteretic control (HHC) LLC

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Target Applications

  • Server PSU with 12-V output
  • Merchant telecom rectifiers
  • Digital controlled industrial AC-DC

Features & Specification

  • Rated Power: 1kW
  • Input: 350-450V DC, Output: 12V DC
  • Better load transient response than the Common Redundant Power Supply (CRPS) standard
  • CLB-based SR control for LLC
  • Monotonic soft-start with any load conditions
  • Small output voltage ripple
PMP41081 Design Specification
Vin (Min) (V) 340
Vin (Max) (V) 420
Vout (Nom) (V) 12
Iout (Max) (A) 84
Output Power (W) 1008
Isolated/Non-Isolated Isolated
Input Type DC
Topology Half Bridge - LLC

Description

This reference design is a 1kW, 400V to 12V half-bridge resonant DC-DC platform, used to evaluate the load transient performance of hybrid-hysteretic control (HHC). HHC is a method which combines direct frequency control (DFC) and charge control, and is charge control with an added frequency compensation ramp. With an additional inner loop, HHC can highly improve the load transient response performance of the inductor-inductor-capacitor (LLC) stage.

Additionally, PMP41081 EVM includes an interface for the LMG3422 half-bridge EVM on the primary side, so the power board can be configured to evaluate GaN performance in the LLC stage by some modifications of cutting off the MOSFET bridge. This design illustrates HHC LLC topology using a C2000™ TMS320F280039C real-time MCU.

PMP41081 EVM Board
C2000 MCU interface with PMP41081 Power Stage Diagram

Relevant Links

Useful links regarding the reference design are provided below:

Note
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Steps to Run the Example

  • It's strongly recommended to first read through the User Guide/Software Guide for any specific setup instructions and hazard warnings before proceeding.
  • To import CCS projects, either import via the button above or mannually select the file directory where this solutions resides.
  • Build the project within the CCS project menu, then launch a CCS debug session and run the executable.

Release Notes

Shown below lists all the software revision history for this reference design:

Software Version SDK Release Changelog
v1.00.00 5.01.00.00 First release, on F28003x devices in C2000Ware Digital Power SDK
v1.01.00 5.02.00.00 Bug Fixes:
  • Resolved SFRA build issue

Hardware design files

For EVM design files such as schematics, BOM, PCB layouts & assembly files, please visit TI design webpage from the link above.

Help and Support

For additional help and support, please visit TI E2E™ design support forums