Evaluation Kit for the MAX1640, MAX1641

 

Part Number	Replacement	Explanation

Description

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The MAX1640 evaluation kit (EV kit) is an adjustable switch-mode current source that operates from a 5.5V to 26V input. It is intended for microprocessor-controlled battery chargers. The charging current, maximum voltage, and pulse-trickle charge are programmed with external resistors. The EV kit is shipped configured for a maximum charge voltage (6 cells). It is configured as a step-down pulse-width modulator (PWM) with synchronous rectification, allowing fast-charge currents up to 1.5A with greater than 90% efficiency. The MAX1640 uses high-side current sense; this allows the load to connect directly to ground, eliminating ground potential errors. The MAX1641 uses low-side current sense.

The MAX1640 EV kit is a fully assembled and tested surface-mount printed circuit board. It can also be used to evaluate the MAX1641.

Key Features

• 5.5V to 26V Input Voltage Range
• Tight Current-Regulation Accuracy:
  • 2% (MAX1641)
  • 5% (MAX1640)
• Up to 1.5A Fast-Charge Current
• Up to 500kHz PWM Operation
• Pulse-Trickle Charge Current
• 100% Maximum Duty Cycle (low dropout)
• Synchronous Rectifier
• Surface-Mount Components
• Fully Assembled and Tested

Applications/Uses

• Backup Battery Charger
• Battery-Powered Applications
• Cell Phones
• Cordless Phones
• Handy Terminals
• Laptop, Notebook, and Palmtop Computers
• PCS Phones
• Portable Consumer Products