CS5280
CS5280 2A switch-mode Li-ion charger with 92% efficiency, I2C interface, and comprehensive protection.
Product Overview
Description
The CS5280 is a high-efficiency switch-mode battery charger for single-cell lithium-ion batteries. It provides up to 2A charge current with 90%+ efficiency, making it ideal for larger batteries and faster charging requirements.
The device implements a complete CC-CV charging profile with automatic termination. Integrated power switches and synchronous rectification minimize external component count while maximizing efficiency.
Comprehensive protection features include input over-voltage protection, battery over-voltage protection, thermal regulation, and safety timers. The I2C interface allows flexible configuration and status monitoring.
Product Series
CS
Primary Application
Tablet computers
Key Features
- High-efficiency switch-mode charging
- Up to 2A charge current
- Synchronous rectification
- I2C programmable interface
- Comprehensive protection features
- Small solution size
Specifications
| Input Voltage | 4.5V to 12V |
|---|---|
| Charge Current | Programmable up to 2A |
| Efficiency | Up to 92% |
| Charge Voltage | 4.2V +/-0.5% |
| Switching Frequency | 1.5MHz |
| Interface | I2C |
| Package | QFN-16 |
Applications
Tablet computers
Electronic system design
Power banks
Electronic system design
Portable medical devices
Medical electronics
Industrial handheld devices
Industrial automation and control
High-capacity battery systems
Battery and charging management
FAE Expert Insights
"The CS5280 is my recommendation when you need faster charging or have larger batteries. The switch-mode architecture provides 90%+ efficiency compared to 70-80% for linear chargers, meaning less heat generation and faster charging. The 2A capability is perfect for tablet and power bank applications. The I2C interface is a nice feature for smart charging systems. While more complex than the CS5180 linear charger, the efficiency benefits are significant for high-current applications. I recommend this part for any application requiring >500mA charge current."
High-efficiency switch-mode charger for fast charging applications
— Jennifer Liu, BeiLuo
Frequently Asked Questions
When should I use CS5280 instead of CS5180?
Use CS5280 when you need charge currents above 500mA, have larger batteries (>1000mAh), or require faster charging times. The switch-mode architecture provides 90%+ efficiency compared to 70-80% for linear chargers, resulting in less heat generation. This is especially important for high-current charging where thermal management would be challenging with a linear charger. The trade-off is slightly higher complexity (requires inductor) and cost.
Use CS5280 for >500mA charging or large batteries; CS5180 for simple, low-cost small battery charging.
What efficiency can I expect from CS5280?
The CS5280 achieves efficiencies of 90-92% depending on input voltage, battery voltage, and charge current. Peak efficiency typically occurs at moderate charge currents (1-1.5A) with small input-output voltage differences. Even at 2A maximum current, efficiency remains above 88%. This high efficiency means less power dissipation as heat, allowing reliable operation without extensive thermal management. The synchronous rectification contributes significantly to the high efficiency compared to non-synchronous switch-mode chargers.
Expect 90-92% efficiency; much better than linear chargers especially at high currents.
What are the key features of CS5280?
The CS5280 offers excellent performance characteristics including High-efficiency switch-mode charging, Up to 2A charge current, Synchronous rectification. It is designed for Tablet computers and Power banks. The device operates over a wide temperature range and provides reliable performance in demanding environments.
Contact our FAE team for detailed application support and sample requests for CS5280.
What are the key features of CS5280?
The CS5280 offers excellent performance characteristics including High-efficiency switch-mode charging, Up to 2A charge current, Synchronous rectification. It is designed for Tablet computers and Power banks. The device operates over a wide temperature range and provides reliable performance in demanding environments.
Contact our FAE team for detailed application support and sample requests for CS5280.
What are the key features of CS5280?
The CS5280 offers excellent performance characteristics including High-efficiency switch-mode charging, Up to 2A charge current, Synchronous rectification. It is designed for Tablet computers and Power banks. The device operates over a wide temperature range and provides reliable performance in demanding environments.
Contact our FAE team for detailed application support and sample requests for CS5280.