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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 212kB) Download   E-Mail

Description

The low-cost MAX1873R/S/T provides all functions needed to simply and efficiently charge 2-, 3-, or 4-series lithium-ion cells at up to 4A or more. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P-channel MOSFET operates in a step-down DC-DC configuration to efficiently charge batteries in low-cost designs. The MAX1873R/S/T regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analog voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current. The MAX1873 may also be used as an efficient current-limited source to charge NiCd or NiMH batteries in multichemistry charger designs. The MAX1873R/S/T is available in a space-saving 16-pin QSOP package. Use the evaluation kit (MAX1873EVKIT) to help reduce design time.

An evaluation kit is available:  MAX1873EVKIT  

Key Features		Applications/Uses
Low-Cost and Simple Circuit Charges 2-, 3-, or 4-Series Lithium-Ion Cells AC Adapter Input-Current-Limit Loop Also Charges Ni-Based Batteries Analog Output Monitors Charge Current ±0.75% Battery-Regulation Voltage 5µA Shutdown Battery Current Input Voltage Up to 28V 200mV Dropout Voltage/100% Duty Cycle Adjustable Charging Current 300kHz PWM Oscillator Reduces Noise Space-Saving 16-Pin QSOP MAX1873 Evaluation Kit Available to Speed Designs		2-, 3-, or 4-Cell Li+ Battery Pack Chargers 6-, 9-, or 10-Cell Li+ Battery Pack Chargers Desktop Cradle Chargers Handheld Instruments (PDAs, Palmtops) Notebook Computers Portable Desktop Assistants (PDAs) Portable Internet Tablets

Diagram

Typical Operating Circuit

Application Notes

Application Note 4169: Understanding Li+ Battery Operation Lessens Charging Safety Concerns - MAX1873

Evaluation Kits

MAX1873EVKIT

Reliability Reports

Show FIT data for: MAX1873 Request Reliability Report for: MAX1873

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: 1-12 of 12

MAX1873	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1873REEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1873REEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1873SEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1873SEEE-T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1873TEEE			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1873TEEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1873REEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1873REEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1873SEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1873SEEE+T			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1873TEEE+			Active	QSOP;16 pin;30.9 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1873TEEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet

More Information

New Product Press Release 2001-09-04  MAX1873Power Supply Cookbook

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