MAX846A

PRODUCTION

Cost-Saving, Multichemistry, Battery Charger System

Universal Charger with Low-Cost µC or Stand-Alone Li+ Charger

Data Sheet (Rev. 0) Product Selection Table
Part Models
2
1ku List Price
Starting From $3.96
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Part Details

  • Multichemistry Charger System (Li-Ion, NiMH, NiCd)
  • Independent Voltage and Current Loops
  • ±0.5% Internal Reference for Li-Ion Cells
  • Lowers Cost:
    • Stands Alone or Uses Low-Cost µC
    • Built-In 1% Linear Regulator Powers µC
    • Linear Regulator Provides Reference to µC ADCs
    • Built-In µC Reset
    • Controls Low-Cost External PNP Transistor or P-Channel MOSFET
  • Space-Saving 16-Pin QSOP
  • Charging-Current-Monitor Output
  • < 1µA Battery Drain when Off
MAX846A
Cost-Saving, Multichemistry, Battery Charger System
MAX846A: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 3

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Hardware Ecosystem

Parts Product Life Cycle Description
Product 1
MAX1782
Advanced Smart Battery-Pack Controller
Switching Battery Chargers 3
MAX1640
PRODUCTION Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier
MAX1647
PRODUCTION Chemistry-Independent Battery Chargers
MAX745
PRODUCTION Switch-Mode Lithium-Ion Battery-Charger
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Evaluation Kits

MAX846AEVKIT

Evaluation Kit for the MAX846A

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Features and Benefits

  • 0.5% Internal Reference for Li-Ion Charging
  • Regulates Voltage and Current into Battery
  • Selectable 1 or 2-Cell Li-Ion Charge
  • 1%, 3.3V, On-Chip, Low-Dropout Linear Regulator
  • 1µA Max Battery Drain when Off
  • Power-Good Function
  • Surface-Mount Components
  • Fully Assembled and Tested

Product Details

The MAX846A evaluation kit (EV kit) is a stand-alone charger for lithium-ion (Li-Ion) batteries. The charging regulator consists of voltage and current loops driving an external, low-cost, PNP pass transistor. In voltage-regulation mode, a current-to-voltage converter supplies a voltage proportional to the current flowing through the Li-Ion battery. The float voltage and charging current can be programmed with just two external resistors. The MAX846A EV kit is shipped configured for charging two Li-Ion cells at 800mA from a 10V power source.

The MAX846A EV kit is a fully assembled and tested surface-mount printed circuit board.

Applications

  • Cell Phones
  • Desktop Cradle Chargers
  • Handheld Instruments (PDAs, Palmtops)
  • Li+ Battery Packs
  • Li+-Ion/NiMH/NiCd Multichemistry Battery Chargers
  • Notebook Computers
MAX846AEVKIT
Evaluation Kit for the MAX846A

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