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reference designLM5140 | Demoboard PMP10655

Texas Instruments LM5140 | Demoboard PMP10655

61W Automotive Dual Output Synchronous Buck Converter Reference Design

Overview

TopologyBuck Converter
Input voltage6-18 V
Switching frequency440-2200 kHz
Output 13.8 V / 8 A
Output 23.8 V / 8 A
IC revisionE1

Description

PMP10655 is a dual-output synchronous buck converter reference design using the LM5140 controller IC. The reference design accepts an input voltage between 6Vin and 18Vin and is capable of supplying a maximum of 8A of continuous current (14A Peak) to the load, per output. Vout1 and Vout2 maintain regulation during cold-crank (Vin dip to 4.3Vin) and load-dump (Vin peak to 42Vin) conditions. Switching of the two converters are 180 degrees out of phase between each other. The design also features the LM5050-1 OR-ing controller configured for efficient reverse polarity protection of the input. PMP10655 is built on a 4-layer FR-4 PCB, with 2 oz. Copper on the Top and Bottom layers, and 1 oz. Copper on the two internal layers.

Features

  • 2.2MHz switching to bypass AM band
  • Front-end high-efficiency reverse polarity protection
  • Smooth switching frequency foldback when in dropout
  • High-side and low-side gate drives with indepdendent rising and falling slew-rate control

Typical applications

  • Automotive Electronics
  • Infotainment Systems
  • Instrument Clusters / Advanced Driver Assistance (ADAS)

More information

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Data­sheet
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Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
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7443556190
SPECWE-HCI SMT Flat Wire High Current Inductor, 1.9 µH, 42.1 A
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Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
Inductance1.9 µH
Performance Rated Current42.1 A
Saturation Current @ 10%23 A
Saturation Current @ 30%52 A
DC Resistance1.2 mΩ
Self Resonant Frequency51 MHz
MaterialWE-PERM 2 
Packaging Unit150 
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