VAS5175——2.0A, 1 / 2Cells Li-ion Battery Switching Charger
DESCRIPTION
The VAS5175 is a 5V-24V input, highly integrated Li-ion/ Li-polymer battery switching charger IC with high accuracy charge current and voltage regulation. It closely monitors the battery pack temperature to allow charge progress only in a present temperature window. It also provides battery detection, pre-conditioning, charge termination, and charge status monitoring. The thermal regulation loop reduces charge current to maintain the junction temperature of 125°C during operation. If the junction temperature exceeds 155°C, it performs over-temperature shutdown and stops operating to ensure safety.
The VAS5175 is suitable for 1Cell / 2Cells battery charging. It integrates 24V rating, low Ron N-FET with a 1.0MHz synchronous buck for efficient battery charging and simply components and PCB design.
VAS5175 is available in SOP8-e package.
Applications
•Notebook
•Electrical tools
•Bluetooth speakers
•POS
•Walkie-talkie
Features
• 1MHz Synchronous Switching
•Built-in MOS
• Up to 2A Programmable Charge Current
• 1/2-cell battery
•Wide Input Voltage Range: 5.0V to 24V
• Up to 93% Efficiency
•Soft start
•Internal loop compensation
•Multiple protection
Output short circuit protection
NTC detection, Over temperature protection
Battery over-voltage protection (BOVP)
Safety Timer
Thermal feedback regulation @ Tj = 125
• Charge status indication
• Accuracy
± 1% Battery Voltage Regulation (CV)
± 10% Charge Current Regulation (CC)