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MAX1737EEI+ - 

Battery Charger for 4 Cells of Li-Ion, Li-Pol battery, 28V input, 4.2V / 4A charge, QSOP-28

MAX1737EEI+ - Battery Charger for 4 Cells of Li-Ion, Li-Pol battery, 28V input, 4.2V / 4A charge, QSOP-28

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Manufacturer Part No:
MAX1737EEI+
Order Code:
2518764
Technical Datasheet:
MAX1737EEI+   Datasheet
See all Technical Docs

Product Overview

The MAX1737EEI+ is a stand-alone switch-mode Lithium-ion Battery-charger Controller. The switch-mode Lithium-ion (Li+) battery charger that charges one to four cells. It provides a regulated charging current and a regulated voltage with only a ±0.8% total voltage error at the battery terminals. The external N-channel switch and synchronous rectifier provide high efficiency over a wide input voltage range. A built-in safety timer automatically terminates charging once the adjustable time limit has been reached. The MAX1737 regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. An additional control loop monitors the total current drawn from the input source to prevent overload of the input supply, allowing the use of a low-cost wall adapter. The per-cell battery voltage regulation limit is set between +4.0 and +4.4V and can be set from one to four by pin strapping.
  • Stand-alone charger for up to 4 Li+ cells
  • ±0.8% Accurate battery regulation voltage
  • 98% Duty cycle low dropout
  • Safely precharges near-dead cells
  • Continuous voltage and temperature monitoring
  • <1µA Shutdown battery current
  • Safety timer prevents overcharging
  • Input current limiting
  • 300kHz PWM oscillator reduces noise
  • 90% Conversion efficiency

Applications

Computers & Computer Peripherals, Power Management

Product Information

:
Li-Ion, Li-Pol
:
28V
:
4.2V
:
4A
:
QSOP
:
28Pins
:
4
:
-40°C
:
85°C
:
-
:
MSL 1 - Unlimited
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