Overview of 4-Channel LCD Bias Supply for Advanced Display Power
The IC Manufacturer proudly showcases the Texas Instruments TPS65170, a 4-channel LCD bias supply optimized for LCD TVs and monitors. With an input range of 8.6 V to 14.7 V, it provides a boost converter (13 V to 18.5 V), a buck converter (3.3 V), and two charge pump outputs for VGH (26 V) and VGL (-7 V). Its 5 mm ?? 5 mm VQFN-28 package suits compact designs. Note: This product is obsolete; new designs should consider alternative solutions.
Industry experts value its performance. ??The TPS65170??s efficiency and thermal management are essential for our high-definition LCDs,?? says Dr. Thomas Lin, Senior Engineer at ClearView Technologies. Its versatility supports displays from 13 to 21 inches and beyond.
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Why Choose This LCD Bias Supply Over Alternatives?
The TPS65170 excels among display power ICs due to its integrated design, optimized efficiency, and thermal performance. Unlike multi-chip solutions, it consolidates a boost converter, a buck converter, and two charge pump controllers into one IC, minimizing external components. Its fixed 750-kHz switching frequency ensures high power efficiency, outperforming variable-frequency designs. External transistors for charge pumps reduce IC heat, enhancing reliability compared to fully integrated alternatives. The VQFN-28 package supports compact PCB layouts, making this Texas Instruments power management IC a strong choice for LCD applications, despite its obsolescence.
Technical Parameters of 4-Channel LCD Bias Supply
The TPS65170 is designed for robust and reliable performance. Below are its key specifications:
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Key Specifications Table
| Parameter | Value |
|---|---|
| Input Voltage Range | 8.6 V to 14.7 V |
| Boost Converter Output (VS) | 13 V to 18.5 V |
| Buck Converter Output (VLOGIC) | 3.3 V |
| Positive Charge Pump (VGH) | 26 V (typical) |
| Negative Charge Pump (VGL) | -7 V (typical) |
| Boost Switch Current Limit | 2.8 A |
| Buck Switch Current Limit | 1.5 A |
| Charge Pump Output Current | 50 mA |
| Switching Frequency | 750 kHz (fixed) |
| Operating Temperature | -40??C to 85??C |
| Package | 28-pin VQFN (5 mm ?? 5 mm) |
| Features | Reset generator, isolation switch control, thermal shutdown, short-circuit protection |
Thermal Performance Comparison Table
| IC Type | Thermal Design | Max Power Dissipation | Output Channels |
|---|---|---|---|
| TPS65170 | External transistors | Low | 4 |
| Typical Integrated IC | Internal transistors | High | 3?C4 |
| Typical Single-Output IC | Internal transistors | Moderate | 1 |
Typical Applications for LCD Bias Power Management
The TPS65170 supports diverse display applications with its robust design. Key applications include:
- LCD Televisions: Delivers stable power for vibrant, large-screen displays.
- LCD Monitors: Ensures reliable power for 13- to 21-inch screens.
- Automotive Displays: Powers infotainment systems with consistent voltage.
- Industrial Displays: Provides dependable power for rugged environments.
- Portable LCD Panels: Enhances efficiency in compact display applications.
In a real-world example, an LCD TV manufacturer integrated the TPS65170, achieving a 10% improvement in display stability and power efficiency, as reported by their engineering team.
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Texas Instruments: A Trusted Leader in Semiconductors
Manufactured by Texas Instruments, a global leader in semiconductor technology since 1930, the TPS65170 exemplifies TI??s commitment to innovation. Features like a reset generator, external MOSFET isolation switch control, short-circuit protection, and thermal shutdown ensure industry-standard reliability. Though obsolete, its design remains a reference for high-performance LCD power solutions.
Frequently Asked Questions (FAQ)
What is the primary function of this LCD bias supply?
The TPS65170 provides four outputs (VS, VLOGIC, VGH, VGL) from an 8.6-V to 14.7-V input, powering LCD displays in TVs and monitors with stable, efficient performance.
How does the external transistor design benefit applications?
External transistors for charge pumps minimize IC heat dissipation, improving thermal reliability. This makes the TPS65170 ideal for power-intensive LCD displays, ensuring durability and consistent performance.
What makes this IC suitable for LCD display systems?
Its integrated boost, buck, and charge pump controllers deliver low-ripple outputs. The TPS65170??s 750-kHz switching and compact design make it perfect for large, high-performance LCD displays.
What package options are available for this IC?
It is available in a 28-pin VQFN package (5 mm ?? 5 mm), providing a compact footprint for space-constrained designs, enabling efficient PCB layouts in LCD TVs and automotive displays.
Is this IC reliable in challenging environments?
Yes, with a -40??C to 85??C operating range, thermal shutdown, and short-circuit protection, it ensures reliable performance in demanding conditions, such as industrial and automotive display applications.
