IP5528 is a multi-functional power management SOC that integrates a boost converter, lithium battery charge management, and battery power indication. It provides a complete solution for TWS charging cases. Thanks to the high integration and rich functions of IP5528, only a few external components are required during application, effectively reducing the size of the overall solution and lowering the BOM cost. IP5528 only needs one inductor to achieve boost and buck functions, supporting low-cost inductors and capacitors. The synchronous boost system of IP5528 provides a rated output current of 400mA, with a conversion efficiency as high as 93%. When lightly loaded, it automatically enters sleep mode, and the quiescent current drops to 15µA. IP5528 adopts switch charging technology, providing a rated charging current of 1A, with a charging efficiency as high as 90%. It has built-in chip temperature protection and intelligent input voltage regulation charging current. IP5528 has a built-in 12bit ADC, which can accurately measure battery voltage and current. It supports 1/2/3/4 LED power displays and digital power displays.

Features

1. MCU

 Integrated 32-bit CPU  16K Bytes MTP ROM, supports USB upgrade  2K Bytes RAM  Supports independent Reset pin  Integrated dual-channel UART headphone communication  Discharge  400mA synchronous boost converter  Boost efficiency up to 93%

2. Discharge

 400mA synchronous boost converter  Boost efficiency up to 93%  Charging  1A synchronous switch charging  Charging efficiency up to 90%  Automatically adjusts charging current to match adapter output capacity  Supports 4.20V, 4.30V, 4.35V, and 4.40V batteries

3. Battery Level Display

 Built-in 12-bit ADC  Supports 1/2/3/4 LED battery level display  Supports various 188 digital display battery level display  Supports battery gauge

4. Rich Features

 Supports NTC function  Supports external pin selection for standby voltage  Supports external pin selection for Hall function  Supports external pin selection for charging current  Supports external pin selection for battery capacity  Supports independent insertion/removal detection for dual earphones  Supports independent current limiting for dual earphones  VPHL/VPHR supports adjustable output voltage 3.2V~5.2V@Step=50mV, supports fast charging for earphones

5. Low Power Consumption

 Intelligently identifies load removal and automatically enters standby mode  Standby power consumption 15 µA  Shipping mode as low as 3 µA

6. Minimal BOM

 Built-in power MOS, 1µH single inductor achieves charging and discharging  Multiple protections, high reliability  Independent dual-earphone current limiting protection  Input undervoltage, overvoltage, overcharge protection  Input and output overtemperature protection  VIN transient voltage withstand up to 15V