MAX1538 Overview
The MAX1538 selector provides power-source control for dual-battery systems. The device selects between an AC adapter and dual batteries based on the presence of the three power sources and the state of charge of each battery. The MAX1538 includes analog parators to detect AC/airline-adapter presence and determine battery undervoltage.
MAX1538 Key Features
- Automatically Detects and Responds to Low-Battery Voltage Condition Battery Insertion and Removal AC-Adapter Presence Ai
- Step-Down and Step-Up Charger patibility
- Fast Break-Before-Make Selection Allows Hot Swapping of Power Sources No External Schottky Diodes Needed
- 50µA Maximum Battery Quiescent Current
- Implements Battery Capacity Relearning
- Allows Usage of Aircraft Supply
- Direct Drive of P-Channel MOSFETs
- Simplifies Power-Management µP Firmware
- 4.75V to 28V AC-Adapter Input Voltage Range
- Small 28-Pin Thin QFN Package (5mm x 5mm)