SLUAAS7 December   2023 UCD3138 , UCD3138064 , UCD3138064A , UCD3138128 , UCD3138128A , UCD3138A , UCD3138A64

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Quick Start
  5. 2 Ecosystem
  6. 3 Introduction
  7. 4 TI Controller Options for Power Supplies
    1. 4.1 Power Controller Landscape
    2. 4.2 UCD3138x Product Selection
  8. 5 TI Hardware
    1. 5.1 Open Loop EVMs
    2. 5.2 Application EVMs
    3. 5.3 Control Cards
    4. 5.4 Reference Designs
  9. 6 Programmers and Debuggers
    1. 6.1 USB-to-GPIO2 Interface Adapter
    2. 6.2 JTAG Debuggers
  10. 7 Software
    1. 7.1 UCD3138x Training Labs
    2. 7.2 UCD3138 Application Development Firmware Kit
    3. 7.3 Custom Firmware
  11. 8 Development Tools
    1. 8.1 Code Composer Studio (CCS)
    2. 8.2 Fusion Digital Power Studio
    3. 8.3 UniFlash
  12. 9 Application
    1. 9.1 Multiple Series Power Stages
    2. 9.2 Multiple Parallel Power Stages
    3. 9.3 High Performance and External Communication
    4. 9.4 High Power Density
  13. 10Support Resources
    1. 10.1 Documentation
    2. 10.2 TI E2E Support Forum
  14. 11Summary
  15. 12References

9.1 Multiple Series Power Stages

Typical power applications require multiple power stages in series to achieve system requirements. For example, an offline AC/DC circuit typically consists of a single-phase boost PFC followed by a resonant LLC converter and synchronous buck converter. Each of these three topologies can require separate analog controllers. Performance can also be improved with the addition of Synchronous Rectification (SR). The figures below show a simplified application and do not include additional devices, such as gate drivers.

GUID-20231127-SS0I-FZ7H-R1DC-H06JNZLWPCCJ-low.svg Figure 9-2 Typical 3-Stage power converter system with SR requires four separate analog controllers

On the other hand, the UCD3138x devices can control multiple power stages in series. The UCD3138x devices can control up to three different control loops using the three EADCs. Each UCD3138x device can also output up to eight unique DPWMs. Each power stage can be configured independently or together to create an efficient and low component count system.

GUID-20231127-SS0I-X27C-9CQK-G2ZBSLFQXTBZ-low.svg Figure 9-3 The UCD3138x Devices can Control Multiple Stages in Series
A. The UCD3138xA Devices have enhanced parametrics, such as SR control.

Key Reference Designs:

  • PMP40586: 1-kW digital-controlled current mode LLC reference design