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高级、与化学类型无关的Level 2电池充电器,带有输入限流

SMBus™总线控制,具有输入限流及安全定时器,为各种化学类型的电池提供智能充电

产品详情

主要特征

应用/用途

Parametric specs for Battery Chargers
Charging VIN (V) (max) 28
Max. ICHG (A) 3
Cell Chemistry Lead Acid
Li-Ion
Li-Polymer
NiCd
NiMH
Universal
# NiMH/ NiCd Cells 1
2
3
4
5
6
7
8
# Lithium Ion Cells 2
3
4
Protected VIN (V) (max) 28
Charger (V) 1 to 18.4
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet
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简化框图

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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参量

Parametric specs for Battery Chargers
Charging VIN (V) (max) 28
Max. ICHG (A) 3
Cell Chemistry Lead Acid
Li-Ion
Li-Polymer
NiCd
NiMH
Universal
# NiMH/ NiCd Cells 1
2
3
4
5
6
7
8
# Lithium Ion Cells 2
3
4
Protected VIN (V) (max) 28
Charger (V) 1 to 18.4
Oper. Temp. (°C) -40 to +85
Package/Pins See Data Sheet

主要特征

  • Input Current Limiting
  • 175sec Charge Safety Timeout
  • 128mA Wake-Up Charge
  • Charges Any Chemistry Battery: Li+, NiCd, NiMH, Lead Acid, etc.
  • Intel SMBus 2-Wire Serial Interface
  • Compliant with Level 2 Smart Battery Charger Spec. Rev. 1.0
  • +8V to +28V Input Voltage Range
  • Up to 18.4V Battery Voltage
  • 11-Bit Battery Voltage Setting
  • ±0.8% Output Voltage Accuracy with Internal Reference
  • 3A max Battery Charge Current
  • 6-Bit Charge Current Setting
  • 99.99% max Duty Cycle for Low-Dropout Operation
  • Load/Source Switchover Drivers
  • >97% Efficiency

应用/用途

  • 笔记本电脑
  • PDA及其它手持设备
  • 销售终端机(POS)

描述

The MAX1645 is a high-efficiency battery charger capable of charging batteries of any chemistry type. It uses the Intel® System Management Bus (SMBus™) to control voltage and current charge outputs.

When charging lithium-ion (Li+) batteries, the MAX1645 automatically transitions from regulating current to regulating voltage. The MAX1645 can also limit line input current so as not to exceed a predetermined current drawn from the DC source. A 175sec charge safety timer prevents "runaway charging" should the MAX1645 stop receiving charging voltage/current commands.

The MAX1645 employs a next-generation synchronous buck control circuitry that lowers the minimum input-to-output voltage drop by allowing the duty cycle to exceed 99%. The MAX1645 can easily charge one to four series Li+ cells.

简化框图

MAX1645、MAX1645A:典型工作电路 MAX1645、MAX1645A: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

过滤搜索

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