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USB供电的Li+充电器

产品详情

主要特征

应用/用途

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 0.5
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 6.5
Charger (V) 4.1
4.2
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.91
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参量

Parametric specs for Battery Chargers
Charging VIN (V) (max) 6.5
Max. ICHG (A) 0.5
Cell Chemistry Li-Ion
Li-Polymer
# Lithium Ion Cells 1
Protected VIN (V) (max) 6.5
Charger (V) 4.1
4.2
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.91

主要特征

  • Charges Single-Cell Li+ Batteries Directly from USB Port
  • 0.5% Overall Charging Accuracy
  • Minimal External Components
  • Input Diode Not Required
  • Automatic IC Thermal Regulation
  • Preconditions Near-Depleted Cells
  • Convenient Power SO-8 Package (1.4W)

应用/用途

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  • 数码相机
  • 手持式计算机
  • MP3播放器
  • PDA与掌上电脑
  • 双向寻呼

描述

The MAX1811 is a single-cell lithium-ion (Li+) battery charger that can be powered directly from a USB port or from an external supply up to 6.5V. It has a 0.5% overall battery regulation voltage accuracy to allow maximum utilization of the battery capacity.

The charger uses an internal FET to deliver up to 500mA charging current to the battery. The device can be configured for either a 4.1V or 4.2V battery, using the SELV input. The SELI input sets the charge current to either 100mA or 500mA. An open-drain output (active-low CHG) indicates charge status.

The MAX1811 has preconditioning that soft-starts a near-dead battery cell before charging. Other safety features include continuous monitoring of voltage and current and initial checking for fault conditions before charging.

The MAX1811 is available in a small 1.4W thermally enhanced 8-pin SO package.

简化框图

MAX1811:典型工作电路 MAX1811:典型工作电路 Zoom icon

支持和培训

在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心