PMP30916

-8V Inverting Buck-boost Reference Design

PMP30916

Design files

Overview

This inverting buck-boost reference design uses LM5146-Q1 to generate -8 V out of telecom input +9 V to +56 V. By topology, the controller is negative referenced so a level shifter has been added to provide ENABLE function. Switching frequency of 400 kHz is a trade-off between switching losses and a reasonable board size.

Features
  • Wide-input voltage range supports supports telecom, industrial and truck applications
  • If using 100-V transistors, the circuit can withstand high load dump
  • Output can be modified from -5 V to -15 V
Output voltage options PMP30916.1
Vin (Min) (V) 9
Vin (Max) (V) 56
Vout (Nom) (V) -8
Iout (Max) (A) 2
Output Power (W) 16
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- Inverting
Communications equipment
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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.

PDF | HTML
TIDT280.PDF (3460 K)

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

TIDMAH2.PDF (218 K)

Detailed schematic diagram for design layout and components

TIDMAH3.PDF (235 K)

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

TIDMAH4.PDF (192 K)

Detailed overview of design layout for component placement

TIDMAH6.ZIP (689 K)

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

TIDCG74.ZIP (126 K)

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

TIDMAH5.PDF (757 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM5146-Q1Automotive 100-V synchronous buck DC/DC controller with wide duty-cycle range

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report –8-V Inverting Buck-Boost Reference Design PDF | HTML May 13, 2022

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