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reference designLM5155 | Demoboard LM5155EVM-SEPIC

Texas Instruments LM5155 | Demoboard LM5155EVM-SEPIC

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller

Overview

TopologySEPIC Buck-Boost Topology
Input voltage5-42 V
Output 112 V / 2 A

Description

The LM5155EVM-SEPIC Evaluation Module (EVM) is designed to showcase the LM5155 wide input voltage Boost/SEPIC/Boost controller, implementing a SEPIC converter with a coupled inductor. The EVM operates at 2.2 MHz, and it produces a regulated output of 12 V 24 W from an input of 5 V to 42 V. When the input voltage is between 3 V to 5 V, the output power is derated down to 10 W. The factory-installed controller is the LM5155-Q1. However, by replacing the IC, the EVM can also be used to demonstrate the performance of the LM51551-Q1, LM5155 and LM51551. The difference between the LM5155-Q1 and LM51551-Q1, or between the LM5155 and LM51551, is that the latter features the hiccup mode for overload protection.

Features

  • Wide input voltage range from 3 V to 42 V, to cover typical automotive battery voltage ranges including cold cranking and load dump transients
  • Optimized for input voltage range from 6 V to 18 V
  • Tightly regulated output voltage of 12 V with a 1% accurate reference voltage
  • Supports 2 A full load when VIN is greater than 5 V
  • Supports 0.8 A load current when VIN drops to 3 V
  • 2.2 MHz switching frequency
  • Peak efficiency > 88%
  • Can evaluate LM51551-Q1, LM5155, and LM51551 ICs, by replacing the factory installed IC with the corresponding IC
  • Hiccup mode for output over current protection (applicable only with LM51551 and LM51551-Q1)

More information

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L1(µH)
L2(µH)
IR(A)
IR 2(A)
ISAT(A)
RDC1 typ(Ω)
RDC2 typ(Ω)
RDC1 max(Ω)
RDC2 max(Ω)
fres(MHz)
Type
Samples
7448700015
WE-DD SMT Shielded Coupled Inductor, 1.5 µH, 1.5 µH
Simu­lation
Downloads9 files

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CAD files ZIP

Electric models ZIP

Download all 9 files as zip archive
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-DD SMT Shielded Coupled Inductor
Inductance 11.5 µH
Inductance 21.5 µH
Rated Current8.6 A
Rated Current 28.6 A
Saturation Current17.5 A
DC Resistance 10.012 Ω
DC Resistance 20.012 Ω
DC Resistance 10.016 Ω
DC Resistance 20.016 Ω
Self Resonant Frequency60 MHz
TypeCrossed