12Vdc Input, 2.1A USB Charger for Smart Phones and Tablets Reference Design

(ACTIVE) PMP7371

Description & Features

Technical Documents

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Description

This reference design takes a 12Vdc input (20V max) and generates a 5V/2.1A output for charging smart phone and tablets. The TPS54240 provides a cost effective yet efficient solution for the DC/DC conversion. The TPS2561A provides a precision current limit to protect the device being charged during over load conditions. The CSD25302 provides a gated latch that protects against output over-voltage conditions.

Features
  • Complete USB charging solution
  • The TPS54240 provides a low cost yet high efficiency (~90%) DC/DC conversion.
  • The TPS2561A provides a precision current limit to protect the device from over load conditions.
  • The design implements a latching type output over-voltage protection.

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Test Data

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Design Files

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Bill of Materials (BOM)

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Parametrics
 PMP7371.1
(Output Voltage 1)
Vin (Min) (V)8
Vin (Max) (V)20
Vout (Nom) (V)5
Iout (Max) (A)2.1
Output Power (W)10.5
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Non Sync

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS2561A  Dual Channel Precision Adjustable Current-Limited Power Switches  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS54240  3.5V to 42V Input, 2.5A Step-Down Converter with Eco-Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS2561A Download
TPS54240 Download -
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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 3413 28 Mar 2012 11
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 249 17 Mar 2014 10
PDF 69 28 Mar 2012 15
PDF 36 28 Mar 2012 26
PDF 26 28 Mar 2012 8

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