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Overvoltage-Protection Controller with Internal Disconnect Switch

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Overvoltage Protection Up to 28V
  • Preset 5.6V Overvoltage Trip Level
  • Internal 525mA Current-Limited Switch
  • ±1.2% Accurate Battery Disconnect (4.2V)
  • Drives Low-Cost n-Channel MOSFET
  • Internal 50ms Startup Delay
  • Overvoltage/Undervoltage-Fault Active-Low FLAGV Indicator
  • Battery-Voltage-Trip Active-Low BAT_OK Indicator
  • Undervoltage Lockout
  • Thermal Shutdown Protection
  • Tiny 10-Pin TDFN Package

Applications/Uses

  • Cell Phones
  • Digital Still Cameras
  • MP3 Players
  • PDAs and Palmtop Devices

Description

The MAX4880 is an overvoltage-protection controller with an internal current-limited switch that can be configured as a low-cost battery charger. When the input voltage exceeds the overvoltage trip level (5.7V), or drops below the undervoltage-lockout level (4.2V), the MAX4880 turns off the external n-channel MOSFET and asserts an undervoltage/overvoltage flag indicator (active-low FLAGV) low to notify the processor.

The MAX4880 internal current-limited switch limits the charge current flowing to the battery to 525mA. The switch opens when the battery voltage reaches its full-charged state (4.2V), and a flag (active-low BAT_OK) asserts to notify the processor. The MAX4880 includes a switch-control input (CB) to turn off the internal current-limited switch, regardless of the battery voltage.

The MAX4880 also features a built-in startup delay that allows the adapter voltage to settle down before turning on the MOSFET. Other features include 15kV ESD protection for the input and a shutdown function (active-low EN) to turn off the external n-channel MOSFET.

The MAX4880 is available in a space-saving 10-pin TDFN package and is specified for operation over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX4880: Typical Operating Circuit MAX4880: Typical Operating Circuit Zoom icon

Technical Docs

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.