The TM1628FS is a dedicated LED controller and driver IC commonly used in various display applications. Manufactured by TM, this chip integrates the functionalities of a keypad scanning interface and an LED drive control circuit. This combination makes it ideal for applications requiring user input and clear visual output.

Applications

• Home appliances (e.g., microwave ovens, washing machines)
• Set-top boxes
• Instrumentation panels
• Consumer electronics (e.g., audio players, DVD players)
• Point-of-sale (POS) systems

Features

• Keypad scanning: Integrated keypad scanning functionality simplifies user input implementation.
• LED drive control: Dedicated LED drive control circuitry ensures efficient and reliable display driving.
• Serial interface: Utilizes a serial interface for communication with a microcontroller, minimizing pin count.
• Adjustable LED brightness: Provides multiple levels of brightness control, enabling customization of the display.
• Power-saving mode: Incorporates a power-saving mode to reduce power consumption in inactive periods.
• 8-segment x 8-digit display capacity

Benefits

• Simplified design: Integrates keypad scanning and LED driving, reducing the need for external components.
• Reduced cost: Lower component count leads to a reduction in overall system cost.
• Improved reliability: Integrated design enhances system reliability.
• Easy to use: Simple serial interface simplifies communication with a microcontroller.
• Flexible brightness control: Adjustable brightness levels allow for customization of the display.
• Low power consumption: Power-saving mode minimizes energy usage.

Additional Details

The TM1628FS typically operates from a 5V supply. It communicates using a 2-wire serial interface, making it easy to connect to a microcontroller. The IC incorporates a built-in oscillator, further simplifying the design. The device supports various LED display configurations and has a maximum segment current of typically 25mA. The duty cycle is adjustable, allowing for fine-tuning of brightness levels. Proper PCB layout techniques are important to minimize noise and ensure optimal performance.