PMP30520

20-W, 2-switch buck boost reference design with variable output voltage

PMP30520

Design files

Overview

This reference design uses the LM25118-Q1. The input voltage is between 9 V and 16 V (withstanding pulse to 32 V). The output voltage is variable from 2 V to 18 V by means of a DAC control input. If the DAC control input is left open, the output voltage is about 13.26 V. With shorted DAC control input, the output voltage is around 18 V.

Features
  • Output voltage can vary between 2 V and 18 V to support wireless charging
  • 2-SW buck-boost topology saves two MOSFETs and drivers versus 4-SW buck boost.
  • Minimal efficiency difference versus 4-SW buck-boost because of <3-A load current
  • Suitable for automotive applications and can survive load dump to 32 V
Output voltage options PMP30520.1
Vin (Min) (V) 9
Vin (Max) (V) 16
Vout (Nom) (V) 13.3
Iout (Max) (A) 3
Output Power (W) 39.9
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- 2 Switch^Buck Boost- Non Sync
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT025.PDF (3909 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRXK5.PDF (106 K)

Detailed schematic diagram for design layout and components

TIDRXK6.PDF (136 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRXK7.PDF (94 K)

Detailed overview of design layout for component placement

TIDRXK9.ZIP (490 K)

Files used for 3D models or 2D drawings of IC components

TIDCEZ9.ZIP (26 K)

Design file that contains information on physical board layer of design PCB

TIDRXK8.PDF (475 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Buck-boost & inverting controllers (external switch)

LM25118-Q13-42-V wide VIN, current mode non-synchronous buck-boost controller, AEC-Q100 qualified

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 20-W, 2-Switch Buck Boost Reference Design With Variable Output Voltage Nov. 05, 2018

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