BUF11702PWPR

Video Amps And Modules Overview

The BUF11702PWPR is a multi-channel LCD gamma correction buffer manufactured by Texas Instruments. It integrates ten dedicated gamma channels and one VCOM buffer within a single TSSOP-28 PowerPAD package. The device operates on a supply voltage ranging from 4.5V to 16V, with an operating temperature range of 0°C to 85°C. Gamma channels provide over 30mA output current drive at 0.5V swing to rails, while the VCOM buffer delivers over 150mA at 5V swing. It features rail-to-rail outputs and handles large capacitive loads effectively.

Video Amps And Modules Feature Summary

• Integrates ten gamma correction channels and one high-drive VCOM buffer in a single package
• Features rail-to-rail output stages optimized for specific voltage ranges across different channels
• Capable of driving large capacitive loads while maintaining stability and phase margin
• Includes internal ESD protection circuits rated up to 4kV (HBM) for functional reliability

Video Amps And Modules Applications

• Buffering reference voltages generated by resistor ladders for LCD source drivers
• Driving the VCOM node on LCD panels requiring high current capacity
• Providing gamma correction signals for TFT-LCD displays
• Scaling gamma channel count by connecting multiple devices in parallel
• Interface buffering between display controllers and panel input stages

Video Amps And Modules Procurement Notes

Verify the complete part number including the PWPR suffix to ensure the correct reel quantity and tape-and-reel packaging configuration. Confirm that the specified temperature range and package thermal characteristics align with the target application's power dissipation requirements. Cross-reference the datasheet revision date to ensure compatibility with design specifications.

Video Amps And Modules Selection Notes

Select this component when designing LCD driver circuits requiring ten distinct gamma reference points plus a common mode voltage buffer. The specialized input stage architecture requires matching specific gamma voltages to corresponding buffers based on their proximity to the supply or ground rails. Consider the PowerPAD package for enhanced thermal performance in dense PCB layouts.

Video Amps And Modules Part Context

The BUF11702 belongs to the BUFxx702 series of multi-channel gamma buffers from Texas Instruments. It serves as a specialized solution for LCD applications, offering a pin-compatible alternative to the older BUF07702 model which provides fewer channels. The series addresses the varying gamma channel requirements of different display panels through integrated channel combinations.

Video Amps And Modules Replacement Considerations

The BUF07702 is a pin-compatible predecessor but offers only six gamma channels. For new designs requiring more channels, the BUF11702 is recommended over the BUF07702. No other direct replacements are explicitly confirmed in the provided documentation.

Video Amps And Modules FAQ

How should the gamma channels be connected to the resistor ladder?

Connect Buffer 1 to the gamma voltage closest to VDD, Buffers 2 through 5 to intermediate voltages, and Buffer 10 to the voltage closest to GND. This matches the specific input stage capabilities of each channel.

What is the maximum output current capability of the VCOM buffer?

The VCOM buffer can deliver over 150mA at a 5V swing to rails, providing significantly higher drive capability than the individual gamma channels to meet heavy capacitive load demands.