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MAX1873

Features: Low-Cost and Simple CircuitCharges 2-, 3-, or 4-Series Lithium-Ion CellsAC Adapter Input-Current-Limit LoopAlso Charges Ni-Based BatteriesAnalog Output Monitors Charge Current±0.75% Battery-Regulation Voltage5µA Shutdown Battery CurrentInput Voltage Up to 28V200mV Dropout Voltage/1...

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SeekIC No. : 004409387 Detail

MAX1873: Features: Low-Cost and Simple CircuitCharges 2-, 3-, or 4-Series Lithium-Ion CellsAC Adapter Input-Current-Limit LoopAlso Charges Ni-Based BatteriesAnalog Output Monitors Charge Current±0.75% Batter...

MAX1873 Data Sheet

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Part Number:
MAX1873
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

 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


Application

Notebook Computers
Portable Internet Tablets
2-, 3-, or 4-cell Li+ Battery Pack Chargers
6-, 9-, or 10-cell Ni Battery Pack Chargers
Hand-Held Instruments
Portable Desktop Assistants (PDAs)
Desktop Cradle Chargers


Specifications

CSSP, CSSN, DCIN to GND.....................................-0.3V to +30V
VL, ICHG/EN to GND.................................................-0.3V to +6V
VH, EXT to DCIN.......................................................-6V to +0.3V
VH, EXT to GND ......................................(VDCIN + 0.3V) to -0.3V
EXT to VH .................................................................+6V to -0.3V
DCIN to VL..............................................................+30V to -0.3V
VADJ, REF, CCI, CCV, CCS,
    IOUT to GND.............................................-0.3V to (VL + 0.3V)
BATT, CSB to GND...................................................-0.3V to +20V
CSSP to CSSN........................................................-0.3V to +0.6V
CSB to BATT...........................................................-0.3V to +0.6V
VL Source Current ............................................................+50mA
VH Sink Current ................................................................+40mA
Continuous Power Dissipation (TA = +70°C)
    16-Pin QSOP (derate 8.3mW/°C above +70°C..........+667mW
Operating Temperature Range
    MAX1873_EEE.................................................-40°C to +85°C
Junction Temperature..................................................... +150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C


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 currentlimited 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.




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