SNVAA85 august   2023 LM25143 , LM25143-Q1 , LM25148 , LM25148-Q1 , LM25149 , LM25149-Q1 , LM5143 , LM5143-Q1 , LM5148 , LM5148-Q1 , LM5149 , LM5149-Q1 , LM61460 , LM61460-Q1 , LM61480 , LM61480-Q1 , LM61495 , LM61495-Q1 , LM62460 , LM62460-Q1 , LMQ61460 , LMQ61460-Q1 , TPSM63604 , TPSM63606 , TPSM63608 , TPSM63610

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2General Simple CC/CV Configuration Circuit
    1. 2.1 CC Circuit Design
    2. 2.2 CV Circuit Design
  6. 3Example Schematic
  7. 4Test Results and Performance Curves
    1. 4.1 Test Method
    2. 4.2 Power Module (TPSM63610)
    3. 4.3 Converter (LM61495)
    4. 4.4 Controller (LM5149)
  8. 5Summary
  9. 6References

1 Introduction

Currently, there is a growing demand for CC/CV regulators in many applications, such as super capacitor energy backup, eBike GSM module and multi-cell battery stacks, USB power delivery, server BBU for 48 V bus architecture, and so on. However, buck regulators are typically implemented with CV regulation, therefore external circuitry is necessary to realize CC/CV regulation.

This application note provides a simple CC/CV configuration that can be added to most buck regulator products with PCM control, including controllers, converters and modules. Design principles and design considerations are discussed and test results are provided to show design implementation feasibilty.