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AMOLED Display Power Supply Use Case: Smartwatch Screens

USE CASE

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This use case examines the application of the MP5611, a triple-output AMOLED display power supply, in smartwatch screens.

The MP5611’s triple outputs (AVDD, ELVDD, and ELVSS) can be used to achieve stable power delivery to smartwatch screens by increasing the available load power and load current, controlling for redundant power supplies, and distributing the thermal load.

In the rising trend of wearable technology, smartwatches are becoming an integral part of daily life as a smartphone extension and health tracker. A high-resolution display is important for smartwatch screens considering the smaller AMOLED screen and varying lighting conditions that can impact visibility. Designers are looking for a solution that can provide voltage regulation across the multiple power supplies of smartwatches to optimize AMOLED display performance while maintaining power efficiency.

The MP5611’s triple outputs (AVDD, ELVDD, and ELVSS) can be used to achieve stable power delivery to smartwatch screens by increasing the available load power and load current, controlling for redundant power supplies, and distributing the thermal load. In addition, the MP5611 provides synchronous rectification with low on resistance (RDS(ON)), decreasing power consumption as well as the external component count. It is available in a TQFN-16 (3mmx3mm) package.

Additional features include:


  • 2.9V to 5.2V Input Voltage (VIN) Range
  • High Accuracy for Output Voltage (VOUT)
  • Good Line and Load Regulation
  • 4.6V to 5.2V Configurable ELVDD Voltage (VELVDD), Default 4.6V
  • -1.4V to -6.4V Configurable EVLSS Voltage (VELVSS), Default -4V
  • 500mA Output Current (IOUT) for ELVDD and ELVSS
  • 5V to 7.7V Configurable AVDD Voltage (VAVDD), Default 5.8V
  • 100mA IOUT for AVDD
  • Respective Enable for AVDD and ELVDD
  • Soft Start (SS)
  • Active Fast Discharge Function
  • Cycle-by-Cycle Current Limit Protection
  • AVDD Output Over-Current Protection (OCP) (90mA to 270mA)
  • ELVDD Output OCP (80mA to 650mA)
  • Output Short to Ground Protection
  • Over-Temperature Protection (OTP)

For more information, delve into MPS’s wide selection of Display Power and Control solutions.

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