SP4502

SP4502 is a single-chip solution specifically designed for power banks, integrating a synchronous switch charging module, a synchronous boost discharge management module, a battery gauge and LED indicator module, and a protection module. The chip incorporates built-in charging and discharging power MOSFETs, supporting a maximum charging current of 2.5A and a synchronous boost output current of 2.1A. It employs a patented adaptive charging current technology for compatibility with low-current adapters, and eliminates external power-setting resistors through a patented control scheme, thereby reducing power consumption and system cost. The chip integrates multiple protection features, including temperature compensation, over-temperature protection, overcharge and over-discharge protection, output overvoltage protection, output heavy-load protection, and output short-circuit protection, ensuring the safety of both the chip and the Li-ion battery. Its application circuit is straightforward, requiring only a minimal number of external components to achieve complete charge and discharge management.

Applications

• Power bank

Key features

• Eliminates costly power-setting resistors
• Patented adaptive charging current technology
• Discharge output: 5V/2.1A
• Charge current: 2.5A max
• Charging efficiency up to 93%
• Discharging efficiency up to 93%
• Battery discharge cutoff voltage: 2.9V
• Selectable charge voltage: 4.2V or 4.35V
• Intelligent temperature control with over-temperature protection
• Integrated output OVP, short-circuit protection, and heavy-load protection
• Integrated overcharge and over-discharge protection
• Trickle charging mode and zero-voltage charging support
• Flashlight function support, max output current 100mA
• Package: ESOP16