QuickView

Technical Documents

Ordering Info

More Information

User Comments (0)

All

Status

Active: In Production.

Description

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

Didn't Find What You Need?

Next Day Product Selection Assistance from Applications Engineers Parametric Search Applications Help

QuickView

Technical Documents

Ordering Info

More Information

Description   Key Features   Applications/Uses   Key Specifications   Diagram

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

Price and Availability   Samples   Buy Online   Package Information   Lead-Free Information

Related Products   Notes and Comments   Evaluation Kits