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MAXREFDES1214: Portable 1.5A USB Charger with Micro-USB Input and USB Standard-A Output

MAXREFDES1214

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Reference Guide

MAXREFDES1214
(PDF 881 KB)
23 Mar 2020

Description

The MAXREFDES1214 is a portable USB charger that uses a lithium-ion (Li+) battery to charge a USB device from a USB Standard-A connector. The battery can be charged through Micro-USB. The MAXREFDES1214 is compliant with USB Battery Charger (BC) revision 1.2 on both USB ports. It has dynamic charger detection to automatically set the maximum charge current allowed to the battery based on the source’s capability. It also features a USB adapter emulator that supports Apple® 1A charging in addition to devices that are compliant with USB BC 1.2. For added flexibility, an I2C bus provides fault monitoring and shutdown capability for the buckboost regulator.

Key Features

  • Battery Charger Input Current up to 1A
  • USB Standard-A Output Current up to 1.5A
  • 4400mAh Li+ Battery
  • Thermal and Overcurrent Protection on the USB Standard-A Output
  • I2C Headers for Flexible Logic Levels from 1.8V to 5.0V
  • Orange LED to Indicate if the Battery Is Charging
  • No External Reverse Blocking Diode Required Between Battery and Charger

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Parametrics

Input Type Vin(Min) Vin(Max) Iout(Max) Single/Multiple Output Vout(V) Pout(W) Isolated/Non-Isolated Topology
DC 3 4.2 1.5 - 5 7.5 Non-Isolated Buck-Boost

Parametrics

Input Type DC
Vin(Min) 3
Vin(Max) 4.2
Iout(Max) 1.5
Single/Multiple Output -
Vout(V) 5
Pout(W) 7.5
Isolated/Non-Isolated Non-Isolated
Topology Buck-Boost

Maxim Devices (6)

Part Number Name Product Family Order Design kits and evaluation modules
MAX8808X 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN Battery Management Buy Now Design Kits
MAX14636 USB Charger Detectors Battery Management Buy Now Not Available
MAX14632 USB Charger Adapter Emulators Universal Serial Bus (USB) Buy Now Design Kits
MAX14595 High-Speed, Open-Drain Capable Logic-Level Translator Level Translators Buy Now Design Kits
MAX8891 High PSRR, Low-Dropout, 150mA Linear Regulators Linear Regulators (LDOs) Buy Now Design Kits
MAX77816 High-Efficiency Buck-Boost Regulator with 5A Switches Switching Regulator - Switching Regulators Buy Now Design Kits

Maxim Devices (6)

Part Number Product Family
Battery Management
1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
Battery Management
USB Charger Detectors
Not Available
Universal Serial Bus (USB)
USB Charger Adapter Emulators
Level Translators
High-Speed, Open-Drain Capable Logic-Level Translator
Linear Regulators (LDOs)
High PSRR, Low-Dropout, 150mA Linear Regulators
Switching Regulator - Switching Regulators
High-Efficiency Buck-Boost Regulator with 5A Switches

Design Files (4)

Title Type Size Date
maxrefdes1214-pcb PDF 2MB 2019-07-09
maxrefdes1214-schematic PDF 78KB 2019-07-09
maxrefdes1214-bom PDF 3MB 2019-07-09
TTS MAXREFDES Test Results Template_Rev 0_0318 PDF 946KB 2019-07-09
Date Type
2019-07-09

maxrefdes1214-pcb

(PDF, 2MB)

2019-07-09

maxrefdes1214-schematic

(PDF, 78KB)

2019-07-09

maxrefdes1214-bom

(PDF, 3MB)

2019-07-09

TTS MAXREFDES Test Results Template_Rev 0_0318

(PDF, 946KB)

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