MAX713EPE+

Series:	--
Packaging:	Tube
Part Status:	Active
Battery Chemistry:	Multi-Chemistry
Number of Cells:	1 ~ 16
Current - Charging:	Constant
Programmable Features:	--
Fault Protection:	--
Charge Current - Max:	--
Battery Pack Voltage:	--
Voltage - Supply (Max):	5.5V
Interface:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Package / Case:	16-DIP (0.300", 7.62mm)
Supplier Device Package:	16-PDIP
Base Part Number:	MAX713

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Introduction

Power Management Integrated Chips (PMIC) are semiconductor devices that enhance and facilitate power management, providing greater control and efficiency over power distribution and consumption. Battery chargers are just one of the many types of applications for PMIC. MAX713EPE+ is one such PMIC, specially designed for battery charges. The following will provide an overview of the features, the application field, and the working principle of the MAX713EPE+ battery charger.

Features

The MAX713EPE+ is a low-cost highly integrated battery charger IC designed to regulated charge current and voltage of rechargeable batteries, including Li-ion, Li-polymer, Ni-MH/Ni-Cd, and Lead Acid. It features a minimum number of components using a fast persistent latch switching technology, minimizing complexity, time-to-market, and cost.The maximum measured load current is 3A, and its PWM switching frequency is 250kHz, providing for fast charge times. The maximum allowable input voltage is 40V, and the output voltage is adjustable from 2.1V up to 20V. Charge termination can be set between 2.42V and 4.2V, and can be adjusted by external resistors. The maximum junction temperature for the IC is 125°C. The MAX713EPE+ also has built-in safety protections, including over-temperature protection and over-/under-voltage protection. It has a low quiescent current of 480uA, enabling a very slim profile and efficient operation.

Application Field

The MAX713EPE+ is a versatile battery charger solution and is applicable to many fields requiring fast and reliable a battery charging system. Its features, such as low cost and simple integration make it ideal for consumer electronics and portable applications where saving space and cost are primary considerations.Due to its adjustable output voltage and over-/under-voltage protection, the MAX713EPE+ also makes an ideal choice for use in vehicles and industrial applications, where safety and reliability are must. The fast charge ability and high output current makes it suitable for even the most demanding applications, such as large scale operations and manufacturing, where downtime needs to be minimized.

Working Principle

The MAX713EPE+ uses a flyback converter system, with a low-side P-type power MOSFET switch, to regulate and control the input current and output voltage of the charger.The MAX713EPE+ works by monitoring the battery based on the external resistors and capacitors. When the current stops, or battery voltage reaches the peak voltage, the IC begins to lower the charge current, in order to maintain the battery’s temperature. During the battery charging stage, the MAX713EPE+ switches on and off the MOSFET depending on the current sensed on the primary side. When the current is high, the IC will turn on the MOSFET; when the current is low, it will turn it off. This constant on/off process helps maintain a steady, regulated charging current. When the battery has been charged, the IC turns off the MOSFET, and the current will stop, thus ending the charging cycle.

Conclusion

MAX713EPE+ is a versatile battery charger IC that exhibits the excellent performance, efficiency, and safety that is expected from a PMIC. Its adjustable output voltage, low quiescent current, and fast charging capabilities make it an ideal choice for those looking for a reliable, fast charging battery charger.

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