MAX712

PRODUCTION

NiCd/NiMH Battery Fast-Charge Controllers

Charges 1-16 Series Cells at Rates Up to 4C

Data Sheet (Rev. 7) Product Selection Table

Part Models: 6
1ku List Price: Starting From $3.95

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Overview

Fast-Charge NiMH or NiCd Batteries
Voltage Slope, Temperature, and Timer Fast-Charge Cutoff
Charge 1 to 16 Series Cells
Supply Battery's Load While Charging (Linear Mode)
Fast Charge from C/4 to 4C Rate
C/16 Trickle-Charge Rate
Automatically Switch from Fast to Trickle Charge
Linear Mode Power Control
5µA (max) Drain on Battery when Not Charging
5V Shunt Regulator Powers External Logic

The MAX712/MAX713 fast-charge Nickel Metal Hydride (NiMH) and Nickel Cadmium (NiCd) batteries from a DC source at least 1.5V higher than the maximum battery voltage. 1 to 16 series cells can be charged at rates up to 4C. A voltage-slope detecting analog-to-digital converter, timer, and temperature window comparator determine charge completion. The MAX712/MAX713 are powered by the DC source via an on-board +5V shunt regulator. They draw a maximum of 5µA from the battery when not charging. A low-side current-sense resistor allows the battery charge current to be regulated while still supplying power to the battery's load.

The MAX712 terminates fast charge by detecting zero voltage slope, while the MAX713 uses a negative voltage-slope detection scheme. Both parts come in 16-pin DIP and SO packages. An external power PNP transistor, blocking diode, three resistors, and three capacitors are the only required external components.

The evaluation kit is available: Order the MAX712EVKIT-DIP for quick evaluations of the linear charger.

Applications

Cellular Phones
Cordless Phones
Handy-Terminals
Laptop, Notebook, and Palmtop Computers
Portable Stereos

Part Models: 6
1ku List Price: Starting From $3.95

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX712CPE+	Plastic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX712CSE+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX712CSE+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX712EPE+	Plastic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX712ESE+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX712ESE+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 18, 2021 - 1702RN ASSEMBLY
		pcn_1702rn
MAX712CSE+	PRODUCTION
MAX712CSE+T	PRODUCTION
MAX712ESE+	PRODUCTION
MAX712ESE+T	PRODUCTION
May 22, 2018 - 1702N ASSEMBLY
		pcn_1702n
MAX712CSE+	PRODUCTION
MAX712CSE+T	PRODUCTION
MAX712ESE+	PRODUCTION
MAX712ESE+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 3
MAX846A	PRODUCTION	Cost-Saving, Multichemistry, Battery Charger System
MAX1640	PRODUCTION	Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1647	PRODUCTION	Chemistry-Independent Battery Chargers
Microcontrollers 1
MAX1782		Advanced Smart Battery-Pack Controller

Protection Switches & Controllers 1
MAX1612		Bridge Battery Backup Controllers for Notebooks

Evaluation Kits

Evaluation Kit for the MAX713 (Switching Applications)

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Features and Benefits

Up to 1A Charge Current
45V Peak Input Voltage Range
Switch-Mode Operation Reduces Heat Dissipation
Surface-Mount Components
Charges 1 to 16 Series Cells

Product Details

The MAX713SWEVKIT-SO is a fully assembled and tested surface-mount board. The MAX713 high-current, switch-mode battery charger controls a P-channel power MOSFET, allowing charge currents up to 1A. Switch-mode operation typically provides 75%-efficient conversion, reducing heat compared to linear-regulator solutions.

The MAX713SWEVKIT can also be used to evaluate the MAX712 just by replacing the MAX713CSE with a MAX712CSE.

Applications

Battery-Powered Applications
Cell Phones
Cordless Phones
Handy Terminals
Laptop, Notebook, and Palmtop Computers
Portable Consumer Products
Portable Stereos

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Overview

Documentation

Data Sheet 1

Reliability Data 1

Design Note 2

Technical Articles 1