MAX20047

NOT RECOMMENDED FOR NEW DESIGNS

Dual 3A USB DCP Charger

Industry's Smallest Dual 3A Port Automotive DCP Charger

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Operating VIN Range of 3.5V to 36V
  • 40V Load-Dump Protection
  • Synchronous DC-DC Converter with Integrated FETs
  • 93% Charge Efficiency at 3A Charging
  • 0.4MHz to 2.2MHz Programmable Switching Frequency by External Pin Settings
  • Spread-Spectrum Operation
  • Fixed 8ms Internal Soft-Start
  • 5.20V Output
  • 99% Duty-Cycle Operation with Low Dropout
  • ±2% Output-Voltage Accuracy
  • Input System Overvoltage and Short-Circuit Protection
  • Accurate SRC_DMOS Current Limiting with Minimal Voltage Drop
    • Low RON 15mΩ Dual USB Power Switches
    • Adjustable SRC_DMOS Current Limit by External Pin Settings
    • Integrated Current Sensing
  • Thermal Regulation and Thermal Shutdown
  • Dual Autonomous Battery-Charging Ports with Portable Device Detection
    • Integrated Apple® 2.4A, 2.1A, 1.0A Detection
    • Integrated Samsung® Detection
    • Integrated DCP Detection
  • Robust for the Automotive Environment
    • Short-to-Battery and Short-to-Ground Protection on Protected SRC_DMOS Output
    • Short-to-Battery and Short-to-PV Protection on Protected HVDP1, HVDM1, HVDP2, and HVDM2 Inputs
    • Tested to ISO 10605 and IEC 61000-4-2 ESD Standards
    • 20-Pin (5.0mm x 3.5mm) FC2-QFN Package
    • -40°C to +125°C Operating Temperature Range
    • AEC-Q100 Qualified

The MAX20047 is an automotive-grade, low-cost, small-footprint dual-port charger IC designed for automotive charging applications. It combines a fully synchronous 6A step-down buck converter with integrated high-side and low-side FETs capable of operating with input voltages from 3.5V to 36V and delivering 5.2V output voltage. The IC features integrated iPod®/iPhone®1.0A and iPad® 2.1A dedicated charging modes.

The IC delivers up to 3A of charging current with 93% efficiency per port through integrated switches with programmable current limit and thermal foldback control. The buck converter switching frequency is programmable from 0.4MHz to 2.2MHz. Short-to-ground protection and overcurrent protection are also provided on the protected HVBUS outputs to protect the internal BUS power rail from an overcurrent fault. The MAX20047 offers short-to-battery up to +18V and can also be ordered with spread-spectrum operation to reduce EMI.

iPod, iPhone, and iPad are registered trademarks of Apple Inc..

Design Solution: Beat the Heat: Build a Compact, Multi-Standard Dual USB Charger ›

Applications

  • Automotive Cigarette Lighter Adapters
  • Power Supply for Linear Chargers
  • USB Dedicated Charging Ports (DCP)
MAX20047
Dual 3A USB DCP Charger
MAX20047: Functional Diagram
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Documentation

Data Sheet 1

Design Note 1

Technical Articles 1

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Evaluation Kits

MAX20047EVKIT

Evaluation Kit for the MAX20047

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Features and Benefits

  • Configurable Charge-Detection Modes
    • USB-IF BC 1.2 Dedicated Charging Port (DCP)
    • Apple® 2.4A, 2.1A, 1.0A, and Samsung® Termination Resistors
  • Integrated, High-Efficiency, DC-DC Converter (440kHz to 2.2MHz)
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX20047 evaluation kit (EV kit) demonstrates the MAX20047 IC in an integrated and small package format.

The EV kit is configured for 400kHz operation, with a 3A (min) per-port current limit. There are two Type A receptacles that can be used to demonstrate the charger emulation capabilities.

Applications

  • Automotive Cigarette Lighter Adapters
  • Power Supply for Linear Chargers
  • USB Dedicated Charging Ports (DCP)
MAX20047EVKIT
Evaluation Kit for the MAX20047

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