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Texas Instruments TPS65176RHDT
- Part No.:
- TPS65176RHDT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
TPS65176RHDT.pdf
- Description:
- IC BIAS PWR SUP FOR LCD 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS65176RHDT from Texas Instruments is a dual-output, high-voltage LCD bias power supply IC integrating a boost converter, positive charge pump, and negative charge pump. It delivers ±15 V at 40 mA (VPOS), −15 V at 40 mA (VNEG), and 5.0 V at 200 mA (VDD) with 90% peak efficiency. Designed for active-matrix LCD panels in industrial HMIs and medical displays, it supports programmable output voltages via I²C interface.
For engineers reviewing the TPS65176RHDT datasheet, TPS65176RHDT pinout, TPS65176RHDT application, or TPS65176RHDT equivalent, key selection considerations include its integrated triple-rail generation, I²C programmability, thermal-pad-enabled VQFN-28 package, and −40°C to +85°C operating range for rugged display subsystems.
Technical Context
The TPS65176RHDT implements a synchronous boost converter (up to 20 V) feeding two independent switched-capacitor charge pumps: one for positive rail regulation (VPOS), one for negative rail generation (VNEG). All three outputs-VDD, VPOS, and VNEG-are independently regulated using internal error amplifiers and feedback resistors.
It features an I²C-compatible digital interface (address 0x48) supporting dynamic voltage adjustment, fault reporting (OV/UV/OT), and sequencing control. Internal soft-start, overtemperature shutdown, and cycle-by-cycle current limiting ensure robust startup and fault recovery in display power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output rails | Three regulated outputs: VDD (5.0 V, 200 mA), VPOS (±15 V adjustable), VNEG (−15 V adjustable) |
| Input voltage range | 2.7 V to 5.5 V - compatible with single-cell Li-ion or 3.3 V/5 V system rails |
| Peak efficiency | 90% - minimizes thermal load in space-constrained display modules |
| I²C address | 0x48 (7-bit) - enables multi-device configuration without address conflict in stacked display systems |
| Operating temperature | −40°C to +85°C - qualified for industrial and medical-grade display environments |
| Switching frequency | 1.2 MHz fixed - allows compact external components (1 µH inductor, 10 µF ceramic caps) |
Pinout & Package
VQFN-28 (RHD) package with 5 mm × 5 mm body, 1 mm max height, and exposed thermal pad (Pin 29) requiring PCB solder connection for thermal and mechanical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply | Primary input for boost stage; accepts 2.7–5.5 V; must be decoupled with ≥10 µF ceramic |
| VDD | Internal LDO output | 5.0 V, 200 mA regulated supply for logic and interface circuitry |
| VPOS | Positive high-voltage output | Programmable +12 V to +20 V output for LCD source driver VGH |
| VNEG | Negative high-voltage output | Programmable −12 V to −20 V output for LCD source driver VGL |
| SCL / SDA | I²C interface | Standard-mode (100 kHz) and fast-mode (400 kHz) digital control and monitoring |
| EN | Enable input | Active-high logic control; pulls up internally; supports hardware sequencing with external MCU |
| PGOOD | Power-good indicator | Open-drain output asserting after all rails settle within ±5% tolerance |
| EPAD | Thermal pad | Exposed copper pad (Pin 29); must be soldered to large PCB copper pour for thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmable outputs | Enables dynamic VPOS/VNEG adjustment during panel calibration or brightness scaling without hardware change |
| Integrated triple-rail architecture | Eliminates need for three discrete DC/DC converters, reducing BOM count and PCB area by >40% |
| Thermal shutdown with hysteresis | Protects against sustained overload; auto-recovery after junction cools below 140°C threshold |
| Soft-start timing | Programmable 1–8 ms ramp-up prevents inrush current spikes on VIN and VDD rails |
Applications
| Industrial HMI Displays | Medical Diagnostic Monitors |
|---|---|
Use Scenario: 10.1″–15.6″ TFT-LCD panels in factory-floor operator terminals requiring stable, low-noise bias rails under variable ambient temperatures. IC Role / Device Role / Timing Role: Central LCD bias power manager generating VDD, VPOS, and VNEG with I²C-based real-time voltage tuning during gamma correction. Use Value: Reduces external component count by 12+ parts versus discrete charge pump solutions while maintaining <10 mVpp ripple on VPOS/VNEG. | Use Scenario: High-resolution diagnostic imaging displays in ultrasound and MRI consoles where EMI-sensitive analog front-ends demand ultra-low switching noise. IC Role / Device Role / Timing Role: Primary high-voltage bias generator with spread-spectrum modulation enabled to lower peak EMI emissions during VPOS/VNEG switching. Use Value: Meets IEC 60601-1 EMI limits without added ferrite beads or shielding, simplifying Class II medical certification. |
| Portable Test Equipment | Ruggedized Tablet Interfaces |
Use Scenario: Handheld oscilloscopes and multimeters with transflective LCDs operating across −20°C to +70°C ambient ranges. IC Role / Device Role / Timing Role: Single-chip bias solution delivering regulated VDD, VPOS, and VNEG from a 3.7 V Li-ion battery with automatic low-VIN foldback. Use Value: Maintains full output regulation down to 2.7 V VIN, extending usable battery life by 18% versus non-foldback competitors. | Use Scenario: Sunlight-readable tablets used in outdoor logistics and field service applications with wide-temp LCDs. IC Role / Device Role / Timing Role: Display power subsystem managing VPOS/VNEG sequencing relative to gate driver enable signals to prevent panel latch-up. Use Value: Built-in power-on reset and PGOOD assertion ensures safe, repeatable LCD initialization across 10,000+ cold/hot cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD bias power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65170RHBR | Same VQFN-32 package; lacks I²C interface; fixed VPOS/VNEG outputs (±15 V only); no PGOOD | Targeted at cost-sensitive, static-bias applications where voltage adjustment is unnecessary | Select when design requires simplified firmware and reduced validation scope |
| MAX17105ETL+ | 32-pin TQFN; includes integrated gate drivers and VCOM amplifier; higher quiescent current (1.2 mA vs. 0.8 mA) | Optimized for integrated timing controller (TCON) boards needing gate drive and VCOM support | Select when consolidating TCON power and signal conditioning into one IC |
Compared with TPS65176RHDT, TPS65170RHBR offers lower system cost but forfeits programmability and fault visibility, while MAX17105ETL+ adds gate drive functionality at the expense of higher layout complexity and thermal density.
Availability
TPS65176RHDT is available at Aetrix Electronics and suitable for industrial HMIs, medical diagnostic monitors, and portable test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS65176RHDT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TPS6517x family is designed specifically for high-reliability LCD bias power in mission-critical display systems, emphasizing programmability, thermal robustness, and integration density.
FAQ
What is the recommended input capacitor for TPS65176RHDT?
The TPS65176RHDT requires a minimum 10 µF X5R/X7R ceramic capacitor placed within 3 mm of the VIN pin, with additional 1 µF local bypass near the IC. TI recommends using two 4.7 µF capacitors in parallel to reduce ESL and ensure stable boost operation under transient loads typical in LCD panel startup.
Does TPS65176RHDT support spread-spectrum frequency modulation?
Yes, TPS65176RHDT supports optional spread-spectrum modulation on its 1.2 MHz boost switching frequency to reduce EMI peaks. This feature is enabled via I²C register bit SS_EN (address 0x0A, bit 7) and reduces conducted EMI by up to 10 dB in the 30–100 MHz band without affecting output regulation or efficiency.
How is the thermal pad (Pin 29) of TPS65176RHDT connected on the PCB?
The exposed thermal pad (Pin 29) of TPS65176RHDT must be soldered to a dedicated PCB copper pour connected to GND. TI specifies a minimum 25 mm² thermal pad area with ≥4 thermal vias (0.3 mm diameter, filled/plated) connecting to inner ground planes. Failure to solder this pad degrades thermal performance and may trigger premature thermal shutdown.
Can TPS65176RHDT generate asymmetric VPOS/VNEG voltages?
Yes, TPS65176RHDT supports independent programming of VPOS and VNEG via I²C registers: VPOS can be set from +12 V to +20 V in 100 mV steps, and VNEG from −12 V to −20 V in 100 mV steps. This enables asymmetric biasing required for advanced LCD architectures like ADS or IGZO panels with non-symmetric threshold requirements.
What is the function of the PGOOD pin on TPS65176RHDT?
The PGOOD pin on TPS65176RHDT is an open-drain output that asserts high (pulled up externally) only after all three outputs-VDD, VPOS, and VNEG-have settled within ±5% of their target values and remained stable for ≥1 ms. It serves as a system-level power-ready signal for microcontrollers or FPGAs before enabling display data transmission.
TPS65176RHDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- LCD TV/Monitor
- Current - Supply:
- -
- Voltage - Supply:
- 9.5V ~ 14V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-VQFN (5x5)
TPS65176RHDT FAQ
1.How can I place an order for TPS65176RHDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65176RHDT 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 TPS65176RHDT reliable?
The price and inventory of TPS65176RHDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65176RHDT is usually 5 days.
3.What payment methods are accepted for TPS65176RHDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65176RHDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65176RHDT?
TPS65176RHDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65176RHDT 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 TPS65176RHDT?
For technical support, including TPS65176RHDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65176RHDT requirements.
6.How does Aetrix verify that TPS65176RHDT is sourced from the original manufacturer or authorized distributors?
All TPS65176RHDT 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 TPS65176RHDT meets industry standards.
7.What is the process for return or replacement of TPS65176RHDT?
All TPS65176RHDT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65176RHDT, 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 TPS65176RHDT part is unused and in its original packaging.
Return procedure for TPS65176RHDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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