The UCN5801LW-T is a BiMOS II serial-input, latched source driver designed for driving multiplexed LED displays. Manufactured by Allegro MicroSystems, this integrated circuit combines CMOS logic and bipolar power outputs to provide a robust and efficient solution for display applications. It is commonly used in applications requiring precise control of LED segments or other similar loads.

Applications

• LED matrix displays: Used in various display systems for controlling individual LEDs.
• Panel meters: Driving LED segments in digital panel meters.
• Industrial controls: Incorporated into control panels for displaying status information.
• Appliance displays: Driving displays in household appliances.
• Automotive displays: Used in car dashboards for displaying information to the driver.

Features

• High Output Voltage: Designed to handle high voltage outputs required for driving LEDs.
• Serial Data Input: Utilizes a serial data input for efficient data transfer and reduced pin count.
• Latched Outputs: Features latched outputs to maintain the display state without continuous data input.
• CMOS Logic Compatibility: Compatible with standard CMOS logic levels for easy integration with microcontrollers.
• Thermal Shutdown Protection: Includes thermal shutdown protection to prevent damage from overheating.
• High-Voltage Outputs: Specifically designed to handle the voltage requirements of LED displays.

Benefits

• Simplified Design: Reduces the complexity of display driver circuits.
• Reduced Component Count: Integrates multiple functions into a single chip, lowering component count.
• Improved Reliability: Thermal shutdown protection enhances reliability.
• Efficient Data Transfer: Serial data input minimizes the number of I/O lines required.
• Stable Display: Latched outputs ensure a stable and flicker-free display.

Additional Details

The UCN5801LW-T operates with a serial data input, clock, and latch enable. The serial data is shifted into an 8-bit shift register and then latched to the outputs. The device is typically packaged in a DIP or SOIC package, allowing for easy mounting on PCBs. It is designed to operate over a wide temperature range, making it suitable for industrial and automotive environments. The output drivers are capable of sourcing current suitable for driving multiple LEDs, and the device includes protection against over-temperature conditions.

Proper heat sinking may be required depending on the application and load requirements. Refer to the manufacturer's datasheet for detailed specifications, application notes, and thermal considerations.