TM1723 – LCD Driver and Control Circuit with Keypad Scanning and Color Backlight

TM1723 – LCD Driver and Control Circuit with Keypad Scanning and Color Backlight

TM1723 is a specialized LCD driver and control circuit with a keypad scanning interface. It integrates an MCU digital port, data latch, LCD driver, keypad scanning, and color backlight driver, offering excellent performance and reliable quality. The TM1723 is fully compatible with the command sets of existing LED driver ICs, without needing to modify the base command of the decoder. It allows direct connection to the front panel of an external LCD display, without requiring an external microcontroller (MCU) or HT6221 for keypad scanning. The chip also supports PWM-controlled backlight and SW common input expansion. The TM1723 is widely used in display driving for VCR, VCD, DVD, home theater, and similar products.

Key Features:

• Low Power CMOS Process: Designed for power efficiency, the TM1723 uses a low-power CMOS process, ideal for energy-sensitive applications.
• Up to 20×4 Point LCD Drive: Capable of driving large LCD displays, up to 20×4 points, with excellent clarity and resolution.
• Up to 4×3 Key Input: Supports keypad scanning for user input, with up to 4×3 key matrix configuration.
• 4-Channel LED Driver with 64-Level PWM: Provides color backlight control for LCDs, enabling vibrant, dynamic lighting with 64-level PWM dimming.
• 4 Universal Input Ports: These can be connected to dial-type electronic encoding switches for enhanced functionality.
• 1/2 or 1/3 LCD Drive Bias Voltage: Selectable LCD drive bias options for flexible display configuration.
• Adjustable LCD Operating Voltage: Ensures compatibility with different LCD modules by allowing adjustable voltage.
• Serial Interface (CLK, STB, DIO): Simplifies communication between the chip and external devices.
• Built-In RC Oscillator: A built-in oscillator, with a typical frequency of 128kHz, reduces the need for external components.
• Packaging: Available in SOP32 package, offering compact and efficient integration into your designs.

Applications:

The TM1723 is primarily used to drive the LCD displays of the following products:

• VCRs (Video Cassette Recorders)
• VCDs (Video Compact Disc Players)
• DVD players and Home Theater Systems
• Any consumer electronics requiring LCD display and keypad scanning functionality.

Why Choose TM1723?

• Multi-Function Integration: The TM1723 integrates LCD driving, keypad scanning, and color backlight control, simplifying your design and enhancing system performance.
• Power Efficient: Its low power consumption ensures energy-efficient operation, perfect for long-lasting applications.
• Seamless Compatibility: The chip is compatible with the existing LED driver ICs, eliminating the need for modification to the base decoder commands, simplifying integration.
• Flexible and Customizable: The adjustable LCD voltage and selectable drive bias offer flexibility for various LCD modules and applications.
• Reliable Performance: The TM1723 is designed to meet high standards of quality and reliability, ensuring consistent performance in demanding environments.