April 19, 2022, China — STMicroelectronics has developed a new highly integrated power management chip (PMIC) for AMOLED displays that combines low quiescent current with high flexibility, extending battery life in portable devices.
The STMP30 PMIC has an input voltage range of 2.9V to 4.8V and incorporates three DC-DC converters, providing all the necessary power rails for AMOLED displays in smartphones and other portable devices. Unlike competitors that fix the VOUT1 voltage at 4.6V, the 550mA VOUT1 boost converter's output voltage is adjustable. The voltage can be set between 4.6V and 5.0V, increasing by 100mV in increments, optimizing screen brightness based on lighting conditions for low power consumption and an excellent visual experience under any circumstances. At the highest voltage setting of 5.0V, the screen enters High Brightness Mode (HBM), providing excellent visual quality in bright outdoor light.
The other two outputs are a 550mA single-phase buck-boost inverter with a voltage regulation range of -0.8V to -6.6V and a 150mA boost converter with a voltage range of 5.5V to 7.9V, respectively. The output voltage values are set via an external pin using the S-Wire protocol. The PMIC can also receive messages via S-Wire to drive the AMOLED screen into Always On Display (AOD) mode, continuously displaying information on the screen with very low power consumption, improving user convenience.
The PMIC features a true shutdown mode for maximum energy savings. Safety features include overheat protection, input undervoltage lockout, and soft-start functionality to limit inrush current. Additionally, the high-voltage output has a fast discharge circuit and short-circuit protection.
STMicroelectronics' STMP30 AMOLED PMIC is now in mass production. For pricing and sample requests, please contact your local STMicroelectronics sales office.
