9.8~13.5-V input, 46-V 300-W output interleave boost reference design


Design files


This reference design is a 300-W power output interleaving combination of two boost converters using LM5155 controller. Each converter outputs continuous 150-W and 200-W peak. A LMC555 circuit generates 150k-Hz square wave signal and its anti-phase signal for synchronous clock for the two LM5155, making two converters working with 180° phase shift, which helps reduce the output voltage ripple. An amplifier samples input current of the two converters, outputs error signal VC to control slave phase to share current with master phase. There is only 4.6°C temperature difference between two phases in the thermal result, good current sharing is achieved. Efficiency of the design is higher than 91% at 400-W peak output. Peak to peak ripple is within 250-mV during 200-W to 400-W transient. The design shows a valid way to expand the output power by paralleling two boost converters.

  • Interleave solutions with two converters for low output ripple
  • Good current sharing performance between two phases
  • High to 91% efficiency at 400-W output
  • Only 250mV peak to peak ripple at 200-400-W transient
Output voltage options PM40679.1
Vin (Min) (V) 9.8
Vin (Max) (V) 13.5
Vout (Nom) (V) 46
Iout (Max) (A) 6.5
Output Power (W) 299
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Multiphase
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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.

TIDT187.PDF (2858 K)

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

TIDM610.PDF (411 K)

Detailed schematic diagram for design layout and components

TIDM611.PDF (139 K)

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

TIDM612.PDF (189 K)

Detailed overview of design layout for component placement

TIDM614.ZIP (1180 K)

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

TIDCFV3.ZIP (1602 K)

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

TIDM613.PDF (1032 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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

LM51552.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller

Data sheet: PDF | HTML
General-purpose op amps

TLV271Single, 16-V, 3-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

CSD18533KCS60-V, N channel NexFET™ power MOSFET, single TO-220, 6.3 mOhm

Data sheet: PDF | HTML
Real-time clocks (RTCs) & timers

LMC555World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 9.8~13.5-V Input, 46-V 300-W Output Interleave Boost Reference Design Jun. 01, 2020

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