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Texas Instruments TPS65178ARSLT
- Part No.:
- TPS65178ARSLT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
TPS65178ARSLT.pdf
- Description:
- IC BIAS PWR SUP FOR LCD 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:124
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Product details
Overview
TPS65178ARSLT from Texas Instruments is a fully programmable LCD bias IC with integrated 6-channel gamma buffer, VCOM reference & dynamic gain control, and four synchronous buck converters (VCC, VCORE, HVDD, VEPI), one boost converter (VDD), and dual charge pumps (VGH/VGL). It delivers 3.3 V/2.0 A, 1.0 V/500 mA, 8 V/500 mA, and 1.8 V/100 mA rails for TFT-LCD panel power and timing control in large-screen TV applications.
For engineers reviewing the TPS65178ARSLT datasheet, TPS65178ARSLT pinout, TPS65178ARSLT application, or TPS65178ARSLT equivalent, this device supports I²C-programmable sequencing, temperature-compensated VGH, 9-bit gamma DACs, and embedded non-volatile configuration storage-enabling single-BOM flexibility across multiple panel types without hardware changes.
Technical Context
The TPS65178ARSLT integrates six independent power regulation paths: a 480–720 kHz boost converter generating VDD (12.8–19 V), four synchronous buck converters operating at 480–2600 kHz (VCC: 3.0–3.7 V; VCORE: 0.9–2.4 V; HVDD: VDD/2; VEPI: 0.9–2.4 V), and dual charge pumps with programmable low/high-temperature VGH (19–34 V / 17–32 V) and VGL (–1.8 to –8.1 V).
It features a 48-pin QFN package with dedicated analog/digital grounds (AGND, PGNDx), I²C interface (SCL/SDA), thermistor-based temperature compensation (TCOMP), dynamic VCOM gain selection (DYN), and programmable startup delays (3 × 3-bit, up to 35 ms per stage) for precise power sequencing in LCD TV timing controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 8.6 V to 14.7 V - supports wide-input industrial-grade LCD TV power supplies with ±0.3 V UVLO hysteresis. |
| VDD Boost Output | 12.8 V to 19 V (6-bit, 100 mV step) - powers source drivers and enables VDD-tracking HVDD generation. |
| VCC Buck Output | 3.0 V to 3.7 V (3-bit, 100 mV step) @ 2.0 A - supplies T-con logic with ±3% accuracy and 0.033%/A load regulation. |
| VCORE Buck Output | 0.9 V to 2.4 V (4-bit, 100 mV step) @ 500 mA - delivers core voltage for timing controller ICs with 1.1–2.3 MHz switching. |
| VGH Charge Pump | 19–34 V (low-temp) / 17–32 V (high-temp), 4-bit programmable - enables GIP-compatible gate driver bias with external thermistor feedback. |
| VGL Charge Pump | –1.8 V to –8.1 V (6-bit, 100 mV step) @ 100 mA - provides negative gate bias with ±3.5% output accuracy and 0.817%/A load regulation. |
| Gamma Buffer | 6-channel, 9-bit DAC (VGMA1–6), VDD-referenced - delivers precise grayscale voltage references with ±0.6 LSB INL for uniform panel luminance. |
| I²C Interface | Standard/Fast mode (100/400 kHz), 2-wire programmability - allows full rail, sequencing, and gain configuration during production or field update. |
Pinout & Package
TPS65178ARSLT uses a 48-pin 6 mm × 6 mm QFN package with exposed PowerPAD™ thermal pad (AGND). Pin functions are validated per TI SLVSAP8D Rev. July 2012 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVIN | Internal regulator input | Primary analog supply input (8.6–14.7 V); powers internal VL regulator and analog blocks. |
| VCC, VCORE, HVDD, VEPI | Buck converter outputs | Four regulated DC outputs with dedicated sense pins (OUT1–OUT4) and switch pins (SWB1–SWB4). |
| VDD, VGH, VGL, VCOM | Power rail sense inputs | Feedback nodes for boost, charge pumps, and VCOM reference; enable closed-loop regulation and monitoring. |
| SCL / SDA | I²C interface | Two-wire serial bus for programming all output voltages, sequencing delays, gamma values, and gain modes. |
| TCOMP | Temperature compensation input | Analog input for NTC thermistor network; adjusts VGH dynamically between cold/hot temperature profiles. |
| DYN | Dynamic VCOM gain select | Logic-level input (high = –2×, low = –4×) enabling real-time VCOM gain switching by T-con during video content changes. |
Key Features
| Feature | Design Value |
|---|---|
| 6-Channel Gamma Buffer | 9-bit resolution per channel with split-range architecture (VGMA1–3: VDD/2 to VDD; VGMA4–6: 0 to VDD/2) for full-panel grayscale fidelity. |
| Programmable VCOM Reference & Gain | 9-bit VPOS DAC + 2-bit fixed gain + 1-bit dynamic gain (DYN pin) - supports both static calibration and frame-rate VCOM adjustment. |
| Integrated Isolation FET | On-chip N-MOSFET (rDS(on) = 100–180 mΩ) between SWI and SWO - enables VDD overvoltage protection and safe power-up sequencing. |
| Four Independent Buck Converters | VCORE and VEPI operate at 1.1–2.6 MHz; HVDD tracks VDD/2; all support chip inductors for minimal solution size and high efficiency (>90% typical). |
| Non-Volatile Configuration Storage | Embedded memory retains I²C-programmed settings (voltages, delays, gamma tables) after power cycle - eliminates external EEPROM and boot-time reconfiguration. |
| Thermal Shutdown Protection | 138°C trip point with 8°C hysteresis - safeguards against sustained overload or poor PCB thermal design in enclosed TV chassis. |
Applications
| LCD TV Panel Power Management | TFT-LCD Timing Controller (T-Con) Support |
|---|---|
Use Scenario: Powering 32–75 inch LCD TV panels requiring multiple isolated, sequenced, and temperature-compensated bias rails. IC Role / Device Role / Timing Role: Central LCD bias IC generating VDD, VCC, VCORE, HVDD, VEPI, VGH, VGL, VCOM, and gamma references under I²C control. Use Value: Eliminates 12+ discrete regulators and DACs; reduces BOM count by >60% while enabling single-firmware support for multiple panel SKUs. | Use Scenario: Supplying regulated logic (VCC), core (VCORE), and interface (VEPI) rails to timing controller ICs in high-resolution displays. IC Role / Device Role / Timing Role: Primary power source for T-con ASICs, providing tightly regulated, low-noise, fast-transient-response supplies synchronized to display frame rate. Use Value: VCORE's 1.1–2.3 MHz switching and ±3% accuracy ensure stable T-con operation; programmable sequencing prevents latch-up during power-up. |
| Temperature-Compensated Gate Driver Bias | High-Fidelity Gamma Calibration |
Use Scenario: Compensating VGH voltage drift across –20°C to +70°C ambient in GIP-based LCD TVs using external NTC thermistor. IC Role / Device Role / Timing Role: Dual-mode positive charge pump with TCOMP input and separate low/high-temperature VGH programming registers. Use Value: Maintains consistent gate turn-on threshold across temperature; avoids image retention and flicker without external compensation circuitry. | Use Scenario: Generating precise, stable gamma reference voltages for 8–10 bit grayscale rendering in premium LCD TVs and monitors. IC Role / Device Role / Timing Role: On-die 6-channel 9-bit gamma DAC with VDD-referenced output range and ±0.6 LSB integral nonlinearity. Use Value: Enables factory calibration of gamma curves via I²C; eliminates external op-amp networks and improves panel-to-panel uniformity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD bias IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65177ARSLR | No VCOM dynamic gain (DYN pin absent); fixed 2-bit VCOM gain only; no TCOMP input; 40-pin QFN. | Lacks temperature compensation and real-time VCOM gain switching - suitable only for fixed-temperature indoor displays. | Select when cost reduction is critical and thermal variation is negligible; requires external VGH compensation circuitry. |
| RTQ2133GQW | Single 4-channel gamma buffer; no integrated VCOM reference or charge pumps; requires external VGH/VGL generators. | Targets mid-size monitors, not large-screen TVs; relies on external bias ICs for gate driver supplies. | Choose for simpler, lower-power monitor designs where full bias integration is unnecessary and board space permits discrete solutions. |
Compared with TPS65177ARSLR and RTQ2133GQW, the TPS65178ARSLT uniquely integrates full-panel bias generation-including temperature-compensated VGH, dynamic VCOM gain, and non-volatile configuration-making it the only single-chip solution qualified for high-end LCD TV platforms requiring zero-BOM variants.
Availability
TPS65178ARSLT is available at Aetrix Electronics and suitable for LCD TV panel power management, timing controller (T-Con) support, temperature-compensated gate driver bias, and high-fidelity gamma calibration requiring stable component supply and long-term lifecycle continuity.
Supply support for TPS65178ARSLT 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, embedded processing, and power management technologies with over 50 years of innovation in high-reliability electronics.
The TPS65178ARSLT belongs to TI's LCD bias IC product line, designed specifically to consolidate power, timing, and grayscale control functions into a single IC for large-format TFT-LCD televisions and monitors.
FAQ
What is the default VCORE output voltage for the TPS65178ARSLT?
The TPS65178ARSLT has a default VCORE output voltage of 1.0 V, as specified in the ordering information and electrical characteristics tables. This differs from the TPS65178A variant, which defaults to 1.8 V. The output is programmable via I²C from 0.9 V to 2.4 V in 100 mV steps, and the TPS65178ARSLT's VCORE accuracy is ±3% over temperature and load.
Does the TPS65178ARSLT support temperature compensation for VGH?
Yes, the TPS65178ARSLT supports temperature compensation for VGH through its dedicated TCOMP pin, which accepts an external NTC thermistor network. It stores two independent VGH programming sets-one for low temperature (19–34 V) and one for high temperature (17–32 V)-and automatically selects between them based on the TCOMP voltage, enabling GIP-compatible gate driver bias stability across operating conditions.
How many gamma reference outputs does the TPS65178ARSLT provide, and what is their resolution?
The TPS65178ARSLT provides six gamma reference outputs (VGMA1 through VGMA6), each with 9-bit resolution (512 steps). VGMA1–3 span VDD/2 to VDD, while VGMA4–6 span 0 V to VDD/2. All channels exhibit ±0.6 LSB integral nonlinearity and ±0.3 LSB differential nonlinearity, ensuring high-fidelity grayscale reproduction across the full panel.
What package type and thermal characteristics does the TPS65178ARSLT use?
The TPS65178ARSLT uses a 48-pin 6 mm × 6 mm QFN package with exposed PowerPAD™ (AGND) for enhanced thermal dissipation. Its junction-to-board thermal resistance (θJB) is 5.3°C/W, and junction-to-ambient (θJA) is 29.1°C/W. The device includes thermal shutdown at 138°C with 8°C hysteresis, making it suitable for compact, sealed TV chassis with limited airflow.
Can the TPS65178ARSLT store configuration settings permanently?
Yes, the TPS65178ARSLT includes embedded non-volatile memory that retains all I²C-programmed settings-including output voltages, sequencing delays, gamma DAC values, VCOM gain modes, and temperature compensation parameters-across power cycles. This eliminates the need for external EEPROM and enables true "single-BOM" deployment across multiple panel variants without firmware updates.
TPS65178ARSLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- LCD TV/Monitor
- Current - Supply:
- -
- Voltage - Supply:
- 8.6V ~ 14.7V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-VQFN (6x6)
TPS65178ARSLT FAQ
1.How can I place an order for TPS65178ARSLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65178ARSLT 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 TPS65178ARSLT reliable?
The price and inventory of TPS65178ARSLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65178ARSLT is usually 5 days.
3.What payment methods are accepted for TPS65178ARSLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65178ARSLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65178ARSLT?
TPS65178ARSLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65178ARSLT 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 TPS65178ARSLT?
For technical support, including TPS65178ARSLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65178ARSLT requirements.
6.How does Aetrix verify that TPS65178ARSLT is sourced from the original manufacturer or authorized distributors?
All TPS65178ARSLT 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 TPS65178ARSLT meets industry standards.
7.What is the process for return or replacement of TPS65178ARSLT?
All TPS65178ARSLT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65178ARSLT, 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 TPS65178ARSLT part is unused and in its original packaging.
Return procedure for TPS65178ARSLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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