Texas Instruments BUF11704AIPWPR

Overview

BUF11704AIPWPR from Texas Instruments is a 10-channel gamma correction buffer with integrated VCOM driver, designed for high-resolution LCD panel timing and voltage reference distribution. It operates from 4.5 V to 18 V, delivers >30 mA per gamma channel (0.5 V swing to rails), >100 mA on VCOM (2 V swing), and supports rail-to-rail output in TSSOP-28 PowerPAD package for LCD TV source driver interfaces.

For engineers reviewing the BUF11704AIPWPR datasheet, BUF11704AIPWPR pinout, BUF11704AIPWPR application, or BUF11704AIPWPR equivalent, key selection criteria include gamma channel count (10 + 1 VCOM), high-current VCOM drive capability (>100 mA), wide supply range (4.5–18 V), thermal performance in PowerPAD package, and input-stage partitioning (buffers 1–5 vs. 6–10) for optimal gamma curve alignment.

Technical Context

The BUF11704AIPWPR implements dual-input-stage architecture: buffers 1–5 use NMOS-only inputs (common-mode range: GND to VDD−1 V) optimized for high-side gamma voltages near VDD; buffers 6–10 use PMOS-only inputs (common-mode range: GND to VDD) for low-side voltages near GND. This partitioning minimizes silicon area while maintaining precise gamma voltage fidelity across full 10-point curves.

VCOM buffer employs a dedicated high-current output stage capable of sourcing/sinking ≥100 mA with ≤5 mV/mA load regulation, enabling direct driving of large-panel LCD backplane capacitance. All channels feature rail-to-rail output swing, 8 kV HBM ESD protection, and stable operation into ≥100 pF capacitive loads without external compensation.

Key Specifications

Pinout & Package

TSSOP-28 PowerPAD package with exposed thermal pad soldered to PCB ground plane for enhanced thermal dissipation (θ_JC = 0.72°C/W). Flow-through pinout simplifies PCB routing: inputs on one side, outputs on opposite side, with dedicated VDD/GND pairs for noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gamma correction buffer applications.

Compared with BUF07704AIPWPR and BUF05704AIPWPR, the BUF11704AIPWPR provides the highest gamma channel density (10+1) and thermal capability (3.58 W) in TSSOP-28 PowerPAD, making it the only option for large-screen LCD TVs requiring full 10-point gamma correction plus robust VCOM drive.

Availability

BUF11704AIPWPR is available at Aetrix Electronics and suitable for large-screen LCD TV panels, high-resolution monitor source drivers, multi-channel gamma expansion systems, and cost-optimized LCD panel reference distribution requiring stable component supply and long-term production continuity.

Supply support for BUF11704AIPWPR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and digital signal processing technologies for industrial, automotive, and consumer electronics markets.

The BUFxx704 product line was developed specifically to address the high-current, multi-channel gamma voltage buffering needs of modern TFT-LCD panels - enabling precise grayscale control, improved brightness, and simplified system-level timing architecture.

FAQ

What is the maximum supply voltage rating for the BUF11704AIPWPR?

The BUF11704AIPWPR has an absolute maximum supply voltage (VDD) rating of 19 V, with recommended operating range from 4.5 V to 18 V. Operation at 18 V enables faster response times and higher brightness in large-screen LCD panels, as confirmed in the SBOS277F datasheet Absolute Maximum Ratings and Recommended Operating Conditions tables.

How does the BUF11704AIPWPR handle gamma voltage partitioning across its 10 channels?

The BUF11704AIPWPR partitions its 10 gamma buffers into two input-stage groups: buffers 1–5 use NMOS-only inputs (common-mode range: GND to VDD−1 V) for high-side gamma voltages near VDD; buffers 6–10 use PMOS-only inputs (common-mode range: GND to VDD) for low-side voltages near GND. This architecture ensures accurate tracking across the full gamma curve without input stage saturation.

Can the BUF11704AIPWPR drive heavy capacitive loads commonly found in LCD source driver interfaces?

Yes, the BUF11704AIPWPR is explicitly designed to drive ≥100 pF capacitive loads without instability, as verified in Typical Characteristics Figure 24 and Application Information section. Its output stage maintains rail-to-rail swing and low distortion into such loads, supporting local decoupling at gamma output nodes for improved transient regulation.

What is the thermal performance advantage of the PowerPAD package used in the BUF11704AIPWPR?

The TSSOP-28 PowerPAD package delivers θ_JC = 0.72°C/W and 3.58 W power dissipation capability (at TA ≤ 25°C with 76 mm × 76 mm copper area), significantly exceeding standard TSSOP packages. This enables safe operation of all 10 gamma channels plus VCOM under full load in high-power LCD TV applications without external heatsinking.

Is the BUF11704AIPWPR pin-compatible with earlier BUFxx702 and BUFxx703 families?

Yes, the BUF11704AIPWPR is pin-compatible with the BUFxx702 and BUFxx703 families per the SBOS277F datasheet description, allowing drop-in replacement in existing designs. This compatibility extends to pin assignment, package outline (TSSOP-28 PowerPAD), and functional interface - simplifying upgrades to higher supply voltage (up to 18 V) and enhanced gamma channel count.