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MAX1909 - Multichemistry Battery Charger

Download the MAX1909 datasheet PDF. This datasheet also covers the MAX8725 variant, as both devices belong to the same multichemistry battery charger family and are provided as variant models within a single manufacturer datasheet.

General Description

The MAX1909/MAX8725 highly integrated control ICs simplify construction of accurate and efficient multichemistry battery chargers.

The MAX1909/MAX8725 use analog inputs to control charge current and voltage, and can be programmed by a host microcontroller (µC) or hardwired.

Key Features

  • Precise Measurement Improves Safety and Performance.
  • ±0.5% Accurate Charge Voltage (0°C to +85°C).
  • ±3% Accurate Input Current Limiting.
  • ±5% Accurate Charge Current.
  • Analog Inputs Control Charge Current and Charge Voltage.
  • Charge Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
  • Up to 17.65V (max) Battery Voltage.
  • Maximum 28V Input Voltage.
  • Programmable Charge Current > 4A.
  • Intelligent AC Adapter Int.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MAX8725_MaximIntegratedProducts.pdf) that lists specifications for multiple related part numbers.

Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX1907A Quick-PWM Master Controllers
MAX1908 Low-Cost Multichemistry Battery Chargers
MAX19191 8-Bit ADC
MAX19192 Dual 8-Bit ADC
MAX1922 1A Current-Limited Switch
MAX1946 Single USB Switch
MAX1947 Low Input/Output Voltage Step-Up DC-DC Converter
MAX1951A PWM DC-DC Step-Down Regulator
MAX19527 1.8V ADC
MAX1958 (MAX1958 / MAX1959) W-CDMA/N-CDMA Cellular Phone HBT PA Management ICs

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
MAX1909/MAX8725 EVALUATION KIT AVAILABLE Multichemistry Battery Chargers with Automatic System Power Selector General Description The MAX1909/MAX8725 highly integrated control ICs simplify construction of accurate and efficient multichemistry battery chargers. The MAX1909/MAX8725 use analog inputs to control charge current and voltage, and can be programmed by a host microcontroller (µC) or hardwired. High efficiency is achieved through use of buck topology with synchronous rectification. The maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously.