Overview: Versatile Dual Output LCD Bias Power Supply
The TPS65123 by Texas Instruments is a high-efficiency bias power supply solution that caters to TFT LCD modules by offering dual positive and negative output voltages. Designed to simplify power architecture in space-constrained devices, the TPS65123 uses a charge pump topology to eliminate the need for inductors, reducing overall design complexity.
Housed in a compact WQFN package and optimized for input voltages between 2.7V and 5.5V, it meets the demanding requirements of modern portable medical, industrial, and consumer electronics. Integrated protection mechanisms further improve the safety and stability of system designs.
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Key Technical Specifications of TPS65123
| Parameter | Specification |
|---|---|
| Input Voltage | 2.7V to 5.5V |
| Output Type | Dual (adjustable positive and negative) |
| Topology | Charge Pump |
| Package | WQFN |
| Quiescent Current | Low |
| Protection Features | Thermal Shutdown, Overcurrent |
Advantages Over Competing LCD Bias ICs
Compared to traditional solutions that rely on multiple converters or external inductors, the TPS65123 offers an elegant and compact alternative. The use of a charge pump minimizes external component count and board space, while delivering the high reliability and performance required in demanding environments.
Choosing this device ensures smoother development cycles and cost-effective BOM planning. With the backing of IC Manufacturer, engineers can access a consistent supply chain and technical documentation support for hassle-free implementation.
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Expanded Technical Parameters
| Feature | Description |
|---|---|
| Input Voltage Range | 2.7V to 5.5V |
| Output Configuration | Dual Output (Positive and Negative) |
| Technology | Charge Pump |
| Current Consumption | Low Quiescent Current |
| Integrated Protection | Thermal and Overcurrent |
| Target Applications | Medical, Consumer, Industrial LCD Panels |
Typical Applications of TPS65123
- Handheld medical imaging and monitoring devices
- Industrial user interfaces and diagnostics panels
- Portable consumer electronics with embedded TFT LCDs
Frequently Asked Questions (FAQ)
What does the TPS65123 power?
It is designed specifically to generate positive and negative voltages required by TFT LCD panels, especially in portable applications.
Can this IC operate in battery-powered environments?
Yes, it is designed for low power operation with minimal quiescent current, which suits battery-powered portable systems.
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What protection features are available?
Built-in thermal shutdown and overcurrent protection guard against typical system faults, improving overall safety.
Does it need inductors?
No. Its inductor-less charge pump topology simplifies layout and reduces component cost significantly.
Why choose this over discrete solutions?
The integration of dual voltage outputs, protections, and compact packaging makes it a cost-effective and reliable choice over multiple discrete parts.
