Texas Instruments BUF11704AIPWP

Overview

BUF11704AIPWP from Texas Instruments is a 10-channel gamma correction buffer with integrated VCOM driver, designed for high-resolution LCD panel source driver reference voltage buffering. 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 features rail-to-rail output in TSSOP-28 PowerPAD package - deployed in LCD TV timing chains requiring precise multi-voltage gamma reference distribution.

For engineers reviewing the BUF11704AIPWP datasheet, BUF11704AIPWP pinout, BUF11704AIPWP application, or BUF11704AIPWP equivalent, this page provides verified electrical specifications, flow-through pinout mapping, gamma/VCOM channel partitioning, thermal design guidance for PowerPAD, and direct alternatives for LCD panel reference buffer selection.

Technical Context

The BUF11704AIPWP implements dual-input-stage architecture: gamma buffers 1–5 use NMOS-only input stages (common-mode range: GND to VDD−1 V) optimized for high-side gamma voltages near VDD; buffers 6–10 use PMOS-only input stages (common-mode range: GND to VDD) for low-side gamma voltages near GND. This enables matched input/output swing behavior without rail-to-rail input op-amp complexity.

VCOM buffer employs a separate high-current output stage capable of sourcing/sinking ≥100 mA with <5 mV/mA load regulation, supporting heavy capacitive loads typical of LCD panel common electrode drive. All channels maintain >85 dB crosstalk rejection at 1 kHz and 60–80 dB PSRR across 10 Hz–1 MHz.

Key Specifications

Pinout & Package

TSSOP-28 PowerPAD (PWP) package with exposed thermal pad on underside; requires mandatory soldering to PCB copper area for thermal and mechanical integrity. Pin 1 marked by dot; pins 14 and 28 are GND; pins 1 and 15 are VDD; pins 2 and 16 are NC (no internal connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BUF07704AIPW, BUF11704AIPWP adds four gamma channels and higher thermal capacity for larger panels, while BUF11704QPWP extends temperature range and adds automotive qualification - neither is pin-compatible with non-PowerPAD alternatives like BUF11703.

Availability

BUF11704AIPWP is available at Aetrix Electronics and suitable for large-screen LCD TV panels, high-resolution monitor source drivers, and industrial display test equipment requiring stable component supply, full production traceability, and long-term lifecycle support.

Supply support for BUF11704AIPWP 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.

BUF11704AIPWP belongs to TI's LCD panel interface product line, engineered specifically to replace discrete op-amp arrays in gamma correction and VCOM drive functions - reducing cost, size, and thermal complexity in modern flat-panel display systems.

FAQ

What is the maximum supply voltage for BUF11704AIPWP?

The absolute maximum supply voltage for BUF11704AIPWP is 19 V, with recommended operating range from 4.5 V to 18 V. Operation at 18 V enables optimal gamma channel slew rate (1.6 V/µs) and output current drive (>30 mA per gamma channel), critical for fast-response LCD TV panels. Exceeding 19 V risks permanent damage per absolute maximum ratings.

How are the 10 gamma channels electrically differentiated in BUF11704AIPWP?

BUF11704AIPWP partitions its 10 gamma channels into two groups: buffers 1–5 use NMOS-only input stages (common-mode range: GND to VDD−1 V), optimized for high-side gamma voltages near VDD; buffers 6–10 use PMOS-only input stages (common-mode range: GND to VDD), optimized for low-side gamma voltages near GND. This architecture ensures precise swing matching without rail-to-rail input circuitry.

Can BUF11704AIPWP drive the VCOM node of a large LCD panel directly?

Yes, BUF11704AIPWP integrates a dedicated VCOM buffer rated for >100 mA sink/source capability with ≤5 mV/mA load regulation and stable operation into >100 pF capacitive loads - sufficient for direct drive of common electrode nodes in 55-inch LCD TV panels. Its output maintains <2.15 V low-level and >15.85 V high-level voltage at 100 mA, per electrical characteristics table.

What PCB layout requirements apply to the PowerPAD thermal pad of BUF11704AIPWP?

The PowerPAD thermal pad of BUF11704AIPWP must be soldered to a minimum 76 mm × 76 mm PCB copper area connected to GND, with a 2×5 array of 13-mil-diameter thermal vias beneath the pad. This configuration achieves θ_JA = 27.9°C/W and supports 3.58 W continuous dissipation - mandatory for reliable operation under full 10-channel + VCOM load.

Is BUF11704AIPWP pin-compatible with earlier BUFxx702 or BUFxx703 families?

Yes, BUF11704AIPWP is explicitly stated as pin-compatible with the BUFxx702 and BUFxx703 families in the datasheet description. This allows drop-in replacement in existing designs, provided the higher 18 V supply capability and enhanced thermal performance of the PowerPAD package are accommodated in layout and thermal management.