PMP21867

12-V / 100-A negative-to-positive synchronous buck-boost reference design for power amplifiers

PMP21867

Design files

Overview

This reference design is a negative-to-positive synchronous buck-boost converter for power amplifier applications. The circuit is powered from the nominal -48-V system source to provide an output voltage of +12 V at 100 A. The design uses two dual synchronous boost controllers for 4-phase operation at a switching frequency of 100 kHz. Output voltage adjustment to +14.5 V is jumper selectable. 1- through 4-phase operation is also jumper selectable.

Features
  • Non-isolated inverting solution for higher power
  • Excellent phase current sharing for balanced thermal performance
  • Jumper selectable phase control
  • Mounting option for bottom-side heat sink
  • Jumper selectable output voltage control
Output voltage options PMP21867.1
Vin (Min) (V) -60
Vin (Max) (V) -36
Vout (Nom) (V) 12
Iout (Max) (A) 100
Output Power (W) 1200
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- Synchronous
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.

TIDT132.PDF (2946 K)

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

TIDM161.PDF (690 K)

Detailed schematic diagram for design layout and components

TIDM162.PDF (107 K)

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

TIDM163.PDF (312 K)

Detailed overview of design layout for component placement

TIDM165.ZIP (2513 K)

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

TIDCFL9.ZIP (897 K)

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

TIDM164.PDF (3459 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)

LM5170-Q1Multiphase bidirectional current controller, AEC-Q100 qualified

Data sheet: PDF | HTML
AC/DC & DC/DC converters (integrated FET)

LM50187.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet: PDF | HTML
General-purpose op amps

LM8261Single 30-V 21-MHz operational amplifier

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS709150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

Data sheet: PDF | HTML
Shunt voltage references

LM4040-N100-ppm/°C precision micropower shunt voltage reference

Data sheet: PDF
Temperature switches

LM26LV±3°C 1.6V-5.5V Capable, factory preset trip point temperature switch with analog outpu

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 12-V / 100-A Negative-to-Positive Synchronous Buck-Boost Reference Design Sep. 10, 2019

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