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28V Linear Li+ Battery Charger with Smart Autoboot Assistant

The Simplest, Safest, and Smallest Charging Solution for Handheld Equipment

Product Details

Key Features

Applications/Uses

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 0.6
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 28
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.6
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Simplified Block Diagram

Support & Training

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 0.6
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 28
Charger (V) 4.2
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
Budgetary
Price (See Notes)
1.6

Key Features

  • Reduces External Components and Total Cost
    • Integrated Current-Sensing Circuit, MOSFET Pass Element, and Thermally Regulation Circuitry
    • No Reverse Blocking Diode Required
  • Guarantees Safe and Accurate Battery Charging
    • Proprietary Die Temperature Regulation Control (+115°C) Allows Maximum Charging Current Without Damaging the IC
    • 4.25V to 28V Input Voltage Range with Over-Voltage Protection Above +7V to Protect Against Unqualified or Faulty AC Adapters
    • Soft-Start Limits Inrush Current
  • Integrated System Features for Compact Designs
    • Programmable Fast-Charge Current: 1ARMS Max
    • Charge-Current Monitor for Fuel Gauging (ISET)
    • Input Power-Source Detection Output (Active-Low POK) and Charge-Enable Input (Active-Low EN)
    • Output for Autobooting (ABO)
  • Reduce Power Dissipation
    • Low Dropout Voltage (300mV at 500mA)

Applications/Uses

  • Bluetooth® Equipment
  • Cellular and Cordless Phones
  • Charging Cradles and Docks
  • Digital Still Cameras
  • MP3 Players
  • Smartphones and PDAs
  • USB Appliances

Description

The MAX8814 intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger is designed for charging a single-cell lithium-ion (Li+) battery.

The MAX8814 controls the charging sequence from the prequalification state through constant-current fast-charge and the final constant voltage charge. The IC achieves high flexibility by providing an adjustable fast-charge current through an external resistor. It also features a booting assistant circuit that distinguishes input sources and battery connection, and provides an output signal (ABO) for system booting.

The device operates over the extended temperature range (-40°C to +85°C), and is available in an 8-pin thermally enhanced 2mm x 2mm TDFN package (0.8mm max height).

Simplified Block Diagram

MAX8814: Typical Operating Circuit MAX8814, a stand-alone, CCCV, thermally regulated linear charger, is made to charge a single-cell lithium-ion (Li+) battery | Typical Operating Circuit Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .