The UCN5801 is a BiMOS II latched source driver designed for applications requiring multiple high-current source outputs. Manufactured by Allegro MicroSystems, this device integrates CMOS logic, bipolar sourcing drivers, and DMOS output transistors to provide a robust and versatile solution for driving various loads.

Applications

• Driving LED displays (e.g., LED matrix displays, LED signage).
• Driving thermal printers (e.g., print heads for receipt printers).
• Driving relays and solenoids in industrial control systems.
• Driving stepper motors (e.g., in robotics, automation equipment).
• Driving incandescent lamps (e.g., in lighting systems).

Features

• High Output Current: Capable of sourcing up to 500 mA per output.
• High Voltage Outputs: Can withstand output voltages up to 80 V.
• CMOS Logic Compatibility: Interfaces directly with standard CMOS logic circuits.
• Internal Clamp Diodes: Provides protection against inductive kickback when driving inductive loads.
• Latched Inputs: Data is latched internally, simplifying control circuitry.
• Thermal Shutdown Protection: Protects the device from damage due to excessive heat.
• Low Input Current: Minimizes the load on the control circuitry.
• Serial Data Input: Simplifies interface with microcontrollers and other digital systems.

Benefits

• Simplified Design: Integrates multiple functions into a single chip, reducing component count and board space.
• Increased Reliability: Internal protection features prevent damage from overcurrent, overvoltage, and overtemperature conditions.
• Improved Performance: High output current and voltage capabilities enable driving a wide range of loads.
• Reduced Cost: Integration reduces overall system cost.
• Easy to Use: Serial data input and latched outputs simplify control.

Additional Details

The UCN5801 typically operates from a supply voltage of 5V for the logic section and a separate higher voltage supply for the output drivers. The device features a serial data input, a latch enable input, and an output enable input. The serial data is shifted into an internal shift register and then transferred to the output latches when the latch enable input is asserted. The outputs are enabled or disabled by the output enable input. The device is available in various packages, including DIP and SOIC. Detailed electrical characteristics, such as input logic levels, output saturation voltages, and switching speeds, can be found in the Allegro MicroSystems datasheet for the UCN5801.