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SOT23, Single-Cell Li+ Battery Charger for Current-Limited Supply

SOT23, Single-Cell Li+ Battery Charger

Product Details

Key Features

Parametric specs for Battery Chargers
Charging VIN (V) (max) 22
Max. ICHG (A) 2
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 22
Charger (V) 4.1
4.2
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/6
Budgetary
Price (See Notes)
1.68
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Simplified Block Diagram

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Parameters

Parametric specs for Battery Chargers
Charging VIN (V) (max) 22
Max. ICHG (A) 2
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 22
Charger (V) 4.1
4.2
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/6
Budgetary
Price (See Notes)
1.68

Key Features

  • Small 6-Pin SOT23 Package
  • Stand-Alone or µP-Controlled Operation
  • 0.5% Voltage Set-Point Accuracy
  • Lowest Power Dissipation
  • Low 4.7V min Input Voltage
  • Top-Off Charging to Achieve Full Battery Capacity
  • No Inductor Required
  • Safely Precharges Near-Dead Cells
  • Automatic Power-Down when Input Power Removed

Applications/Uses

  • Cradle Chargers
  • Digital Still Cameras
  • PDAs and Other Handheld Devices
  • Self-Charging Battery Packs
  • Single-Cell Li+ Portable Applications
  • Small Handheld Equipment
  • Wireless Handsets

Description

The MAX1736 is a simple, low-cost, single-cell lithium-ion (Li+) battery charger for small hand-held applications. When accompanied by a current-limited voltage source (such as a wall cube), the MAX1736 provides simple, accurate charging and termination control for single-cell Li+ batteries. The MAX1736EUT42 is preset to a 4.2V battery regulation voltage, while the MAX1736EUT41 is preset to 4.1V.

The MAX1736 initiates charging in one of four ways: battery insertion, charger power-up, battery voltage threshold, and by external manipulation of the EN pin. The device features an internal precharge current source that safely charges near-dead cells, as well as input-supply detection that shuts down the MAX1736 when the supply is removed to minimize battery current drain.

The MAX1736 accepts input voltages up to 22V, making it compatible with a wide range of input supplies. It has a single control input yet offers stand-alone and microprocessor-controlled operation. The MAX1736 is packaged in a small SOT23-6 package. An evaluation kit (EV kit) is available to reduce design time.

Simplified Block Diagram

MAX1736: Typical Operating Circuit MAX1736: 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 .