SP4533

The SP4533 is a synchronous boost single-chip solution designed for power banks, integrating a linear charge management module, synchronous discharge management module, battery gauge and LED indicator module, and protection module. The chip features built-in charge and discharge power MOSFETs, with a fixed charging current of 1A and synchronous boost supporting 1A output current. It incorporates multiple protection functions including temperature compensation, over-temperature protection, overcharge and over-discharge protection, output overvoltage protection, output overload protection, and output short-circuit protection, ensuring the safety of both the chip and the Li-ion battery. The solution features a simple application circuit, requiring only a minimal number of external components to implement charge and discharge management.

Applications

• Power bank

Key features

• Discharge output: 5V/1A
• Charge current: 1A
• Up to 92% discharge efficiency at 1A output
• Battery discharge cutoff voltage: 2.85V
• Charge voltage selectable via external pin: 4.2V or 4.35V
• Intelligent thermal control with over-temperature protection
• Integrated output OVP, short-circuit protection, and heavy-load protection
• Integrated overcharge and over-discharge protection
• Trickle charging and zero-voltage charging support
• Flashlight output support
• Package: ESOP8