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Texas Instruments BUF01900AIPWR
- Part No.:
- BUF01900AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Video Amps and Modules
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BUF01900AIPWR.pdf
- Description:
- IC AMP TFT-LCD 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,611
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Product details
Overview
BUF01900AIPWR from Texas Instruments is a 10-bit programmable voltage source with integrated rail-to-rail output buffer, nonvolatile OTP memory, and two-wire interface - designed specifically for LCD panel VCOM calibration. It delivers up to 100mA output current, operates from 7V–18V analog supply and 2.0V–5.5V digital supply, and supports ±25mV offset accuracy over −40°C to +85°C.
For engineers reviewing the BUF01900AIPWR datasheet, BUF01900AIPWR pinout, BUF01900AIPWR application, or BUF01900AIPWR equivalent, this device serves as a high-current, memory-equipped VCOM calibrator requiring no external op-amp in single-channel LCD timing systems - with verified OTP programming, load regulation ≤1.5 mV/mA, and HBM ESD rating of 2 kV.
Technical Context
The BUF01900AIPWR integrates a 10-bit DAC, on-chip 250kΩ nominal VBIAS impedance network, and a p-channel rail-to-rail output buffer capable of sourcing/sinking ≥100mA while maintaining <4V headroom from VS and <2V from GND. Its OTP memory stores one calibrated VCOM value across four write cycles, and power-up defaults to mid-scale (VS/2) if unprogrammed.
It communicates exclusively as a slave via industry-standard two-wire interface (I²C-compatible), supporting Standard (100kHz), Fast (400kHz), and High-Speed (3.4MHz) modes - with address selection via A0 (TSSOP-8) or A0/A1 (DFN-10), and General Call Reset (00h + 06h) for full internal reset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit DAC (1024 discrete output levels) |
| VCOM Output Current | 100mA max sourcing/sinking - sufficient to drive large LCD panel capacitance without external buffering |
| Analog Supply Range | 7V to 18V - compatible with standard LCD panel AVDD rails |
| Digital Supply Range | 2.0V to 5.5V - interoperable with 3.3V and 5V microcontrollers |
| OTP Memory | 4-cycle one-time-programmable storage - retains calibrated VCOM value across power cycles |
| ESD Rating | 2kV HBM / 500V CDM - meets industrial handling requirements for panel manufacturing environments |
| Load Regulation | 0.5–1.5 mV/mA - ensures stable VCOM under dynamic panel load shifts |
| Offset Accuracy | ±25 mV max over temperature - enables sub-1% VCOM calibration precision in production |
Pinout & Package
BUF01900AIPWR is packaged in TSSOP-8 (PW) with exposed thermal pad. Pin functions are validated per TI SBOS337A datasheet: pins 1–8 correspond to VS, NC, BIAS, GND, SDA, SCL, A0, and VSD respectively. The NC (pin 2) must remain unconnected; A0 sets I²C address (76h/77h); VSD powers digital logic independently from analog VS.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Analog supply input | 7V–18V main power for buffer and DAC - must be applied after VSD |
| 2 (NC) | No connection | Internally unused - must be left floating or grounded per layout best practice |
| 3 (BIAS) | Voltage divider reference node | Connects to external R1/R2 network setting initial VCOM and adjustment range |
| 4 (GND) | Analog ground return | Common reference for VS, VCOM, and BIAS - separate from DGND in mixed-signal layout |
| 5 (SDA) | Two-wire data line | Open-drain I²C bus line - requires external pull-up to VSD |
| 6 (SCL) | Two-wire clock input | Master-generated clock - no internal pull-up; synchronous with SDA transitions |
| 7 (A0) | I²C address LSB | Defines slave address: LOW = 76h, HIGH = 77h (TSSOP-8 only) |
| 8 (VSD) | Digital supply input | 2.0V–5.5V logic power - must be applied before VS to prevent latch-up |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail buffered output | Delivers 100mA while maintaining output swing within 4V of VS and 2V of GND - eliminates need for external op-amp in most LCD VCOM applications |
| On-chip OTP memory | Stores one calibrated VCOM code across four write cycles - enables factory-set calibration without EEPROM charge pump overhead |
| Independent analog/digital supplies | VS (7–18V) and VSD (2–5.5V) decoupling allows coexistence with 3.3V controllers and high-voltage panel rails |
| Programmable VCOM adjustment range | Set via external R1/R2 divider at BIAS pin - supports fine-tuning of flicker-critical VCOM offsets during panel burn-in |
| High-speed I²C compatibility | Supports up to 3.4MHz operation - reduces calibration time in automated test equipment (ATE) setups |
| Robust industrial temp range | Specified from −40°C to +85°C ambient - validated for notebook and industrial display operating conditions |
Applications
| LCD Panel VCOM Calibration | Potentiometer Replacement |
|---|---|
Use Scenario: Final-stage flicker optimization during LCD module manufacturing using automated calibration fixtures. IC Role / Device Role / Timing Role: Programmable VCOM voltage source with nonvolatile storage - replaces manual potentiometer tuning with repeatable digital calibration. Use Value: Achieves ±25mV VCOM accuracy across temperature, reducing panel rejection rates by eliminating mechanical drift and operator variability. |
Use Scenario: Digitally adjustable DC bias in analog signal chains where mechanical potentiometers fail due to vibration or wear. IC Role / Device Role / Timing Role: 10-bit programmable voltage reference with rail-to-rail output - provides stable, software-controlled offset without wiper resistance or contact bounce. Use Value: Enables remote recalibration and firmware-based trimming in field-deployed instrumentation, extending product lifetime beyond mechanical component limits. |
| Motor Drive Offset Adjustment | Programmable Power Supply |
Use Scenario: Closed-loop motor control systems requiring precise, temperature-stable current sense amplifier offset nulling. IC Role / Device Role / Timing Role: Precision programmable offset generator - injects calibrated DC correction into feedback path of motor driver op-amps. Use Value: Compensates for amplifier input offset drift over −40°C to +85°C, improving torque consistency and reducing low-speed jitter in servo applications. |
Use Scenario: Lab-grade bench power supply with digitally set output voltage and persistent user presets. IC Role / Device Role / Timing Role: High-current programmable voltage source - sets reference for power stage error amplifiers with 100mA drive capability. Use Value: Eliminates external buffer stages while delivering stable, ripple-free reference voltage - simplifying design and reducing bill-of-materials cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable VCOM buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BUF01901AIPWR | Lacks integrated VCOM buffer; DAC output only - requires external op-amp for current drive | Better suited when gamma buffer (e.g., BUF11705) already provides VCOM drive | Select BUF01901AIPWR only if system-level VCOM buffering exists - avoids redundant buffer stage and reduces cost |
| BUF12800AIPWR | 12-channel, 10-bit programmable VCOM buffer - no OTP memory; serial interface only | Designed for multi-channel gamma correction, not single-VCOM calibration | Choose BUF12800AIPWR only for panels requiring independent VCOM tuning across multiple segments - not a drop-in replacement |
Compared with BUF01901AIPWR and BUF12800AIPWR, BUF01900AIPWR uniquely combines single-channel high-current VCOM drive, on-chip OTP storage, and minimal external component count - making it optimal for cost-sensitive, space-constrained LCD modules lacking integrated gamma buffers.
Availability
BUF01900AIPWR is available at Aetrix Electronics and suitable for LCD panel manufacturing, motor drive offset calibration, and programmable power supply design requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for BUF01900AIPWR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in display interface and power management ICs.
BUF01900AIPWR belongs to TI's VCOM calibration product line - engineered specifically for high-volume LCD panel manufacturing, emphasizing factory-programmable precision, robustness in production environments, and seamless integration with automated test systems.
FAQ
What is the primary function of the BUF01900AIPWR in LCD systems?
The BUF01900AIPWR serves as a programmable VCOM voltage source with integrated 100mA rail-to-rail buffer and nonvolatile OTP memory. In LCD systems, it replaces mechanical potentiometers to digitally calibrate VCOM voltage for flicker reduction - storing the final calibrated value for automatic restoration at each power-up. Its design directly targets production-line efficiency and long-term stability in notebook and industrial display modules.
Does the BUF01900AIPWR require an external op-amp for VCOM drive?
No, the BUF01900AIPWR does not require an external op-amp for VCOM drive. It integrates a dedicated rail-to-rail output buffer capable of sourcing and sinking up to 100mA - sufficient to drive typical LCD panel VCOM loads without additional amplification. This eliminates external components in single-channel VCOM architectures, unlike the BUF01901AIPWR which outputs only the DAC voltage and requires external buffering.
How many times can the OTP memory in BUF01900AIPWR be programmed?
The OTP memory in BUF01900AIPWR supports up to four total write cycles - meaning the stored VCOM value can be overwritten three times after initial programming. Each write requires analog supply voltage between 8.5V and 18V. The programming status (0–4 writes) is readable via bits D15–D12 during I²C register reads, enabling firmware verification of calibration persistence in production test systems.
What are the supply voltage requirements for BUF01900AIPWR operation?
BUF01900AIPWR requires two independent supplies: analog supply (VS) from 7V to 18V for the buffer and DAC, and digital supply (VSD) from 2.0V to 5.5V for the I²C interface and control logic. Critically, VSD must be applied before VS to prevent excessive current draw; during OTP programming, VS must be ≥8.5V. Both supplies must be properly decoupled per TI SBOS337A layout guidelines.
Can BUF01900AIPWR operate in high-speed I²C mode?
Yes, BUF01900AIPWR fully supports high-speed I²C mode up to 3.4MHz. Activation requires sending a special Hs master code (00001xxx) with SCL ≤400kHz after START - the device then switches internal filters to enable high-speed communication. Subsequent transfers occur at up to 3.4MHz until a STOP condition resets the mode. This capability accelerates automated calibration in high-throughput ATE environments.
BUF01900AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Applications:
- TFT-LCD Panels: VCOM Driver
- Output Type:
- Rail-to-Rail
- Number of Circuits:
- 1
- -3db Bandwidth:
- -
- Slew Rate:
- -
- Current - Supply:
- 900 µA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply, Single/Dual (±):
- 7V ~ 18V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TSSOP
BUF01900AIPWR FAQ
1.How can I place an order for BUF01900AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for BUF01900AIPWR 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 BUF01900AIPWR reliable?
The price and inventory of BUF01900AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUF01900AIPWR is usually 5 days.
3.What payment methods are accepted for BUF01900AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUF01900AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUF01900AIPWR?
BUF01900AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUF01900AIPWR 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 BUF01900AIPWR?
For technical support, including BUF01900AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUF01900AIPWR requirements.
6.How does Aetrix verify that BUF01900AIPWR is sourced from the original manufacturer or authorized distributors?
All BUF01900AIPWR 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 BUF01900AIPWR meets industry standards.
7.What is the process for return or replacement of BUF01900AIPWR?
All BUF01900AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with BUF01900AIPWR, 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 BUF01900AIPWR part is unused and in its original packaging.
Return procedure for BUF01900AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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