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Texas Instruments BUF11702PWP
- Part No.:
- BUF11702PWP
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BUF11702PWP.pdf
- Description:
- IC AMP TFT-LCD 28HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,031
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Product details
Overview
BUF11702PWP from Texas Instruments is a 10-channel gamma correction buffer plus integrated VCOM driver for high-resolution LCD panels. It delivers >30mA per gamma channel (0.5V swing to rails) and >150mA on the VCOM channel (5V swing to rails), supports rail-to-rail output, drives ≥100pF capacitive loads, and operates across 4.5V–16V supply range at 0°C to 85°C.
For engineers reviewing the BUF11702PWP datasheet, BUF11702PWP pinout, BUF11702PWP application, or BUF11702PWP equivalent, this device is selected for precision voltage reference buffering in LCD source driver gamma calibration, where matched channel performance, high current drive, and large capacitive load stability are critical.
Technical Context
The BUF11702PWP implements a segmented input-stage architecture: gamma buffers 1–5 use NMOS-only inputs (common-mode range up to VDD, down to ~1V), while buffers 6–10 use PMOS-only inputs (common-mode range includes GND). This matches the asymmetric gamma voltage distribution across LCD resistor ladders.
The VCOM buffer features enhanced output stage design with >150mA sourcing/sinking capability, optimized for driving high-capacitance LCD common electrodes while maintaining phase margin >50° at CL ≥ 100pF and RL = 2kΩ - verified in Figures 46 and 47 of SLOS359F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gamma channels | 10 independent buffers, each with matched input/output swing for specific gamma voltage positions (GMA1–GMA10) |
| VCOM channel | 1 dedicated high-current buffer (>150mA at 5V swing) for LCD panel common electrode drive |
| Supply range | 4.5V to 16V - enables direct integration with standard LCD panel power rails without LDO pre-regulation |
| Rail-to-rail output | VOH ≥ 9.7V / VOL ≤ 0.3V at 10V supply and ±10mA load - ensures full dynamic range utilization in gamma reference networks |
| Capacitive load drive | Stable operation with ≥100pF load and >50° phase margin - eliminates need for external isolation resistors in typical LCD source driver interface |
| ESD rating | 4kV HBM - meets industrial handling requirements for LCD module assembly lines |
| Operating temperature | 0°C to +85°C - qualified for commercial and industrial LCD display applications including monitors and signage |
Pinout & Package
The BUF11702PWP is housed in a thermally enhanced TSSOP-28 PowerPAD™ package (package designator PWP), featuring an exposed thermal pad on the underside for improved heat dissipation (θJA = 27.9°C/W with 2oz copper pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Single 4.5V–16V supply powers all 10 gamma buffers and VCOM buffer; no separate analog/digital rails required |
| GND | Ground reference | Common return for all input/output signals and internal biasing; tied directly to PowerPAD thermal pad |
| IN1–IN10 | Gamma buffer inputs | High-impedance (IIB < 200pA) inputs accepting gamma reference voltages; IN1–IN5 accept VDD-referenced inputs, IN6–IN10 accept GND-referenced inputs |
| OUT1–OUT10 | Gamma buffer outputs | Low-impedance outputs driving gamma reference nodes of LCD source driver; each rated for >30mA continuous current |
| VCOM_IN | VCOM buffer input | Input for LCD panel VCOM reference voltage; common-mode range spans 1V to VDD |
| VCOM_OUT | VCOM buffer output | High-current output capable of >150mA sourcing/sinking into LCD panel's common electrode capacitance |
| NC (pins 12,13,24,25) | No connect | Unbonded pins; must remain unconnected per datasheet Figure 6 and ordering table |
Key Features
| Feature | Design Value |
|---|---|
| Segmented input architecture | Buffers 1–5 use NMOS-input stage (VDD-tolerant); buffers 6–10 use PMOS-input stage (GND-inclusive) - precisely matches gamma voltage ladder distribution |
| Flow-through pinout | Input and output pins arranged linearly (e.g., IN1/OUT1 adjacent) - minimizes PCB trace length and crosstalk in dense LCD driver layouts |
| Integrated ESD protection | All I/O pins include internal HBM circuits rated to 4kV - eliminates need for external TVS diodes in production LCD modules |
| Thermal enhancement | PowerPAD package enables 3.5W power dissipation at TA ≤ 25°C - supports sustained high-current operation across all 11 channels |
| Matched channel performance | Typical input offset voltage ≤15mV across full temperature range - ensures consistent gamma voltage tracking between channels |
Applications
| High-Resolution Monitor Gamma Calibration | LCD TV Panel Reference Buffering |
|---|---|
Use Scenario: Driving 10-point gamma reference inputs of a 1920×1080 LCD source driver IC using a resistor ladder network. IC Role / Device Role / Timing Role: Precision voltage follower for each gamma node (GMA1–GMA10), plus VCOM electrode driver. Use Value: Eliminates gamma voltage droop under load; maintains <0.1% settling accuracy (tS ≤ 6µs) across all 10 channels simultaneously. | Use Scenario: Providing stable gamma reference voltages and VCOM bias to a 3840×2160 (4K) LCD TV panel with dual-domain source drivers. IC Role / Device Role / Timing Role: 10-channel gamma buffer + VCOM driver interfacing with TI's TFP401 or similar source driver. Use Value: Delivers >30mA per gamma channel and >150mA on VCOM while sustaining >50° phase margin at 100pF load - prevents image flicker and grayscale inversion. |
| Industrial LCD Display Module | Medical Imaging LCD Calibration |
Use Scenario: Embedded HMI display in factory automation equipment requiring reliable gamma performance over 0°C–85°C ambient. IC Role / Device Role / Timing Role: Gamma reference buffer operating from 12V system rail without intermediate regulation. Use Value: Wide 4.5V–16V supply range and 4kV HBM ESD rating enable direct integration into ruggedized display assemblies without additional protection circuitry. | Use Scenario: DICOM-compliant grayscale calibration in diagnostic medical monitors where gamma consistency directly impacts clinical interpretation. IC Role / Device Role / Timing Role: Precision gamma voltage buffer ensuring <±0.5% inter-channel gain matching across full temperature range. Use Value: Input offset voltage ≤15mV and channel-to-channel crosstalk >85dB preserve absolute grayscale fidelity required by FDA-cleared imaging systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gamma correction buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BUF07702PWP | 6 gamma channels + 1 VCOM channel; same TSSOP-20 PowerPAD package; identical VCOM drive spec (>150mA) | Targeted for lower-resolution panels (e.g., 1366×768) requiring fewer gamma points | Select when panel gamma curve requires only 6 reference points - reduces BOM cost and PCB area vs. BUF11702PWP |
| BUF07703PWPR | 6 gamma channels + 1 VCOM; pin-compatible upgrade to BUF07702; improved PSRR (62dB typ) and lower IDD (2.5mA typ) | Recommended for new designs replacing BUF07702; not functionally equivalent to BUF11702PWP due to channel count | Choose for new 6-channel designs requiring extended lifecycle support; not a drop-in replacement for BUF11702PWP |
Compared with BUF07702PWP and BUF07703PWPR, the BUF11702PWP uniquely provides 10 gamma channels in a single TSSOP-28 PowerPAD package - enabling higher-resolution panel support without stacking multiple 6-channel devices or compromising layout density.
Availability
BUF11702PWP is available at Aetrix Electronics and suitable for high-resolution monitor manufacturing, LCD TV panel integration, and industrial HMI display development requiring stable component supply and long-term availability.
Supply support for BUF11702PWP 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 and embedded processing solutions, with leadership in display interface, power management, and signal chain technologies.
The BUFxx702 product line was designed specifically for LCD panel gamma correction and VCOM drive applications - integrating matched multi-channel buffering, high-current output stages, and thermal-enhanced packaging to replace discrete op-amp solutions in display electronics.
FAQ
What is the maximum capacitive load the BUF11702PWP can drive while maintaining stability?
The BUF11702PWP is characterized to drive ≥100pF capacitive loads with >50° phase margin (Figure 47, SLOS359F), and remains stable up to 10nF in typical LCD source driver configurations when used with recommended layout practices including proper PowerPAD grounding. Its output stage is explicitly optimized for heavy capacitive loading common in gamma reference networks.
How does the BUF11702PWP handle different input voltage ranges across its 10 gamma channels?
The BUF11702PWP uses a segmented input architecture: gamma buffers 1–5 feature NMOS-only input stages supporting common-mode input up to VDD but down to ~1V above GND; buffers 6–10 use PMOS-only input stages covering GND to VDD−1V. This matches the asymmetric gamma voltage distribution shown in Figure 45 of SLOS359F, ensuring optimal performance at each reference point.
Can the BUF11702PWP be used in place of general-purpose op amps for gamma correction?
Yes - the BUF11702PWP is purpose-built for gamma correction and outperforms general-purpose op amps in key areas: it delivers >30mA per gamma channel (vs. typical 20–40mA for rail-to-rail op amps), integrates matched channel characteristics, includes built-in 4kV HBM ESD protection, and features flow-through pinout for simplified PCB routing. Its architecture eliminates need for external compensation in LCD applications.
What is the thermal performance advantage of the PowerPAD package in the BUF11702PWP?
The TSSOP-28 PowerPAD package provides θJA = 27.9°C/W (with 2oz copper pad), enabling 3.5W total power dissipation at TA ≤ 25°C. This allows the BUF11702PWP to sustain simultaneous high-current operation across all 11 channels - critical for driving gamma references and VCOM under full-panel white-field conditions without thermal derating.
Is the BUF11702PWP pin-compatible with other devices in the BUFxx702 family?
No - the BUF11702PWP (TSSOP-28) is not pin-compatible with BUF07702PWP (TSSOP-20) or BUF07703PWPR (TSSOP-20). Pin count, pin assignment, and PowerPAD pad layout differ between the 20-pin and 28-pin variants. Migration requires PCB redesign; however, both share identical functional architecture and VCOM specifications.
BUF11702PWP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 28-PowerTSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Applications:
- TFT-LCD Panels: Gamma Buffer, VCOM Driver
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 10
- -3db Bandwidth:
- 1 MHz
- Slew Rate:
- 1V/µs
- Current - Supply:
- 2.5 mA
- Current - Output / Channel:
- -
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 16V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-HTSSOP
BUF11702PWP FAQ
1.How can I place an order for BUF11702PWP through Aetrix?
Please submit a Request for Quotation (RFQ) for BUF11702PWP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BUF11702PWP reliable?
The price and inventory of BUF11702PWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUF11702PWP is usually 5 days.
3.What payment methods are accepted for BUF11702PWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUF11702PWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUF11702PWP?
BUF11702PWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUF11702PWP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BUF11702PWP?
For technical support, including BUF11702PWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUF11702PWP requirements.
6.How does Aetrix verify that BUF11702PWP is sourced from the original manufacturer or authorized distributors?
All BUF11702PWP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BUF11702PWP meets industry standards.
7.What is the process for return or replacement of BUF11702PWP?
All BUF11702PWP units undergo pre-shipment inspection (PSI). If there is an issue with BUF11702PWP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BUF11702PWP part is unused and in its original packaging.
Return procedure for BUF11702PWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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