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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 224kB) Download   E-Mail

Description

The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification. Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter. The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.

An evaluation kit is available:  MAX1772EVKIT  

Key Features		Applications/Uses
Input Current Limiting ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C) Programmable Battery Charge Current >4A Analog Inputs Control Charge Current and Charge Voltage Monitor Outputs for: Current Drawn from AC Input Source Charging Current AC Adapter Present Up to 18.2V (max) Battery Voltage 8V to 28V Input Voltage >95% Efficiency 99.99% (max) Duty Cycle for Low-Dropout Operation Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.		Handheld Terminals Notebook and Subnotebook Computers PDAs and Other Handheld Devices

Diagram

Pin Configuration

Application Notes

Application Note 344: Input Current Limiting in Battery Chargers for Mobile Computing Applications - MAX1772 Application Note 981: Choices for Battery-Charging System Architecture - MAX1772

Evaluation Kits

MAX1772EVKIT

Reliability Reports

Show FIT data for: MAX1772 Request Reliability Report for: MAX1772

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

MAX1772	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1772EEI			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1772EEI-T			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1772EEI+			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1772EEI+T			Active	QSOP;28 pin;62 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0173 (PDF) Use pkgcode/variation: E28+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2000-08-21

Related Products

MAX1645, MAX1645A Advanced-Chemistry-Independent, Level-2 Battery Chargers with Input Current Limiting More Like This: View Product Families for Similar Products See All Battery Chargers (64 Products)

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

Data Sheet   Application Notes   Design Guides   Engineering Journals   Reliability Reports   Software/Models   Evaluation Kits

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