The LT1947EMS from Linear Technology is a versatile and compact dual display power supply integrated circuit, designed to meet the demanding requirements of portable and compact display applications. This high-performance chip is housed in a small MSOP-10 package, making it an excellent choice for space-constrained designs.

Key Features:

• Wide Input Voltage Range: The LT1947EMS operates with an input voltage range from 2.7V to 16V, accommodating a variety of power sources including single-cell lithium-ion batteries.
• Dual Outputs: It provides two outputs: a positive output that can deliver up to 40V, and a negative output that can go down to -40V, which are ideal for driving OLEDs and LCDs.
• High Efficiency: The device achieves high efficiency through its internal 1.2A switches and its ability to operate with a switching frequency up to 2.2MHz, which allows the use of small, low-profile inductors and capacitors.
• Adjustable Switching Frequency: Designers can set the switching frequency anywhere from 250kHz to 2.2MHz with an external resistor, providing flexibility in balancing efficiency and external component size.
• Integrated Soft-Start: The LT1947EMS features an integrated soft-start function that limits inrush current during startup, providing a smooth power-up sequence for sensitive display components.

Applications:

The LT1947EMS is ideal for a range of applications, including:

• Active Matrix OLED Displays (AMOLED)
• Thin Film Transistor LCDs (TFT-LCD)
• Portable Instruments
• Battery-Powered Devices

Conclusion:

With its dual outputs, wide input voltage range, and high switching frequency capabilities, the LT1947EMS from Linear Technology is a robust and flexible solution for powering dual-display systems in portable devices. Its compact MSOP-10 package and integrated features like soft-start make it a highly efficient choice for designers looking to optimize power management in compact electronic devices.