Maxim MAX7452ESA+T

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Overview

The MAX7452ESA provides all functions necessary for charging lithium-ion (Li+) battery packs. It provides a regulated charging current of up to 4A without getting hot, and a regulated voltage with only ±0.75% total error at the battery terminals. It uses low-cost, 1% resistors to set the output voltage, and a low-cost N-channel MOSFET as the power switch. The MAX7452ESA regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. The per-cell battery voltage regulation limit is set between 4V and 4.4V using standard 1% resistors, and then the number of cells is set from 1 to 4 by pin-strapping. Total output voltage error is less than ±0.75%. For a similar device with an SMBus microcontroller interface and the ability to charge NiCd and NiMH cells, refer to the MAX1647 and MAX1648. For a low-cost Li+ charger using a linear-regulator control scheme, refer to the MAX846A.

Features

Applications

• Consumer, Professional, Automotive
• Industrial Video
• Video Capture, Editing, and Processing
• Genlock Circuits
• Surveillance & Security Video Systems
• Set-Top Boxes (STB) & Digital Video Recorders (DVR)
• Plasma Displays and Video Projectors
• Machine Vision and Inspection Systems
• Video Trigger Oscilloscopes and Waveform Monitors
• HDMI