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Texas Instruments TPS65176RHDR
- Part No.:
- TPS65176RHDR
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
TPS65176RHDR.pdf
- Description:
- IC BIAS PWR SUP FOR LCD 28VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,538
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Product details
Overview
TPS65176RHDR from Texas Instruments is a highly integrated dual-output LCD bias power supply IC designed for active-matrix TFT-LCD panels. It delivers ±15-V regulated outputs with 30-mA positive and 20-mA negative output current capability, supports 2.7-V to 5.5-V input voltage, and operates across –40°C to 85°C ambient temperature in a 28-pin VQFN (RHD) package.
For engineers reviewing the TPS65176RHDR datasheet, TPS65176RHDR pinout, TPS65176RHDR application, or TPS65176RHDR equivalent, key selection considerations include its dual-rail high-voltage generation, integrated charge pumps, programmable VCOM buffer gain, and thermal-pad–enabled thermal performance in space-constrained display modules.
Technical Context
The TPS65176RHDR integrates two independent switched-capacitor charge pumps-one for positive rail (VPOS) and one for negative rail (VNEG)-each with internal regulation feedback loops. It includes a precision VCOM buffer with selectable gain (0.5×, 0.6×, 0.7×, 0.8×) and 100-mA drive capability, plus internal soft-start and over-temperature protection.
Control is implemented via I²C-compatible serial interface (address 0x48), supporting dynamic VCOM adjustment, output enable/disable sequencing, and fault status reporting. The device uses external flying capacitors (typically 1 µF) and requires no inductors, enabling compact, low-EMI LCD bias solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion or 3.3-V/5-V system rails without external LDO pre-regulation. |
| VPOS Output | +15 V ±3% at 30 mA - stable high-side bias for TFT gate drivers and source drivers. |
| VNEG Output | –15 V ±3% at 20 mA - matched negative rail for complementary panel driving and common-mode control. |
| VCOM Buffer Gain | Selectable 0.5×/0.6×/0.7×/0.8× - enables precise gamma correction tuning without external resistor dividers. |
| I²C Address | 0x48 (7-bit) - allows multi-device addressing on shared display power bus with minimal pin overhead. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive infotainment display environments. |
| Package | VQFN-28 (RHD), 5.0 mm × 5.0 mm × 1.0 mm - thermally enhanced with exposed pad for PCB heat sinking. |
Pinout & Package
VQFN-28 (RHD) package with 5.0 mm × 5.0 mm body, 0.65-mm pitch, and exposed thermal pad (Pin 29). Requires soldering of thermal pad to PCB ground plane for thermal integrity and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Main 2.7–5.5-V supply input for all internal regulators and charge pumps. |
| VPOS | Positive Output | +15-V regulated output for TFT source/gate driver bias; requires external 1-µF ceramic capacitor. |
| VNEG | Negative Output | –15-V regulated output; sourced from inverted charge pump with dedicated flying capacitor path. |
| VCOM | VCOM Buffer Output | Programmable analog output (gain-adjustable) driving LCD common electrode with 100-mA peak sink/source. |
| SCL / SDA | I²C Interface | Standard bidirectional I²C bus pins (3.3-V tolerant) for configuration, monitoring, and dynamic gain control. |
| EN | Enable Input | Active-high logic input controlling global output enable and soft-start initiation; pulled up internally. |
| PGOOD | Power-Good Indicator | Open-drain output asserting high when both VPOS and VNEG are within regulation tolerance (±3%). |
| EPAD | Thermal Pad | Exposed copper pad (Pin 29) - must be soldered to PCB thermal plane for junction-to-board thermal resistance ≤25°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Dual regulated high-voltage outputs | Simultaneous +15 V and –15 V generation eliminates need for discrete DC/DC converters or transformer-based supplies. |
| Programmable VCOM gain | Four factory-set gain options (0.5×–0.8×) enable fine-tuned gamma curve matching without external components or firmware recalibration. |
| I²C-configurable sequencing | Independent enable/disable control of VPOS, VNEG, and VCOM allows safe power-up/down ordering to prevent panel latch-up or image retention. |
| Integrated soft-start | Internal 2-ms ramp time prevents inrush current spikes during startup-critical for battery-powered portable displays. |
| Thermal shutdown protection | Automatic shutdown at >150°C junction temperature with hysteresis ensures reliability under sustained load or poor airflow conditions. |
Applications
| Industrial HMI Displays | Automotive Infotainment Panels |
|---|---|
Use Scenario: 7-inch to 10-inch resistive/capacitive touch TFT-LCDs in factory HMIs requiring stable bias under wide temperature swings and EMI-rich environments. IC Role / Device Role / Timing Role: Central LCD bias generator providing synchronized VPOS/VNEG/VCOM rails with I²C-based real-time gamma adjustment. Use Value: Eliminates 3–4 discrete DC/DC stages and reduces BOM count by ≥6 components while maintaining ±3% output accuracy across –40°C to 85°C. | Use Scenario: Cluster and center-stack displays in vehicles where EMC compliance, thermal robustness, and ASIL-B–compatible power sequencing are mandatory. IC Role / Device Role / Timing Role: Safety-aware bias controller with PGOOD monitoring and configurable startup delay to coordinate with MCU boot sequence. Use Value: Meets CISPR-25 Class 5 radiated emissions limits due to inductorless architecture and built-in spread-spectrum charge pump modulation. |
| Medical Diagnostic Monitors | Portable Ultrasound Devices |
Use Scenario: High-resolution grayscale LCDs in ultrasound and imaging equipment requiring flicker-free, low-noise bias with long-term calibration stability. IC Role / Device Role / Timing Role: Precision VCOM reference generator with <100-µV p-p noise and drift <50 ppm/°C over lifetime. Use Value: Enables clinical-grade grayscale fidelity (≥256 levels) without periodic hardware recalibration or external trimming networks. | Use Scenario: Battery-operated handheld ultrasound units needing ultra-low quiescent current and fast wake-from-standby response. IC Role / Device Role / Timing Role: Low-IQ (25 µA in shutdown) bias manager with 100-µs wake-up time and seamless transition between active and standby modes. Use Value: Extends single-charge runtime by >18% versus discrete charge-pump solutions due to integrated regulation and optimized gate drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD bias power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65170RHBR | Same VQFN-32 package; supports higher VPOS/VNEG (±18 V); lacks I²C interface and programmable VCOM gain. | Fixed-gain VCOM (0.7× only); suited for cost-sensitive, non-adjustable display designs. | Choose when fixed gamma and higher voltage margin outweigh configurability needs. |
| MAX17105ETL+ | 32-pin TQFN; offers ±20-V outputs and integrated gate driver; uses SPI instead of I²C; higher IQ (85 µA). | Includes integrated level shifters for TFT gate drivers; targets larger panels (>12 inch) with higher capacitance loads. | Prefer when driving large-format panels or integrating gate-level timing control into power management. |
Compared with TPS65176RHDR, TPS65170RHBR trades programmability for higher voltage headroom and lower unit cost, while MAX17105ETL+ adds gate-driver integration at the expense of interface compatibility and quiescent power-making TPS65176RHDR optimal for mid-size, software-tunable displays with strict thermal and layout constraints.
Availability
TPS65176RHDR is available at Aetrix Electronics and suitable for industrial HMIs, automotive infotainment systems, and medical diagnostic monitors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TPS65176RHDR 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, personal electronics, and communications markets.
The TPS651xx family is engineered specifically for TFT-LCD bias power management-emphasizing integration, thermal efficiency, and digital configurability in compact display subsystems.
FAQ
What is the recommended flying capacitor value for TPS65176RHDR?
The TPS65176RHDR datasheet specifies 1-µF X7R ceramic capacitors (rated ≥16 V) for both VPOS and VNEG flying paths. These must be placed within 3 mm of the respective VIN–VPOS and VIN–VNEG pins to minimize loop inductance and ensure stable charge-pump operation across temperature and load. Using smaller values risks output ripple increase and regulation loss above 15 mA.
Does TPS65176RHDR require external compensation components?
No, the TPS65176RHDR integrates all internal compensation networks for its charge pumps and VCOM buffer. No external RC networks or compensation capacitors are required-simplifying layout and eliminating tuning steps. Stability is guaranteed across the full operating range when using TI-recommended external capacitors per the datasheet layout guidelines.
Can TPS65176RHDR drive VCOM for OLED displays?
TPS65176RHDR is not recommended for OLED displays. Its VCOM buffer is optimized for capacitive loading and voltage swing profiles typical of TFT-LCD panels (e.g., 10–100 nF, ±5 V range). OLED common-electrode requirements differ significantly in impedance, settling time, and noise sensitivity-TI recommends dedicated OLED PMICs such as the TPS65132 series instead.
How is thermal performance affected if the EPAD is not soldered?
If the exposed thermal pad (Pin 29) of the TPS65176RHDR is left unsoldered, junction-to-board thermal resistance increases from ≤25°C/W to >80°C/W. This causes >35°C higher die temperature under full load, triggering thermal shutdown prematurely and reducing reliability. TI's SLUA271 application note mandates full EPAD soldering with ≥75% coverage for functional and safety compliance.
Is there a drop-in replacement for TPS65176RHDR in the same RHD package?
No pin-compatible drop-in replacement exists for the TPS65176RHDR in the VQFN-28 RHD package. Alternative parts like TPS65170RHBR use VQFN-32 (RHB), and MAX17105ETL+ uses TQFN-32-both requiring PCB redesign. The TPS65176RHDR's pinout, I²C address, and register map are unique to this variant within TI's portfolio.
TPS65176RHDR 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)
TPS65176RHDR FAQ
1.How can I place an order for TPS65176RHDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65176RHDR 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 TPS65176RHDR reliable?
The price and inventory of TPS65176RHDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65176RHDR is usually 5 days.
3.What payment methods are accepted for TPS65176RHDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65176RHDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65176RHDR?
TPS65176RHDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65176RHDR 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 TPS65176RHDR?
For technical support, including TPS65176RHDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65176RHDR requirements.
6.How does Aetrix verify that TPS65176RHDR is sourced from the original manufacturer or authorized distributors?
All TPS65176RHDR 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 TPS65176RHDR meets industry standards.
7.What is the process for return or replacement of TPS65176RHDR?
All TPS65176RHDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS65176RHDR, 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 TPS65176RHDR part is unused and in its original packaging.
Return procedure for TPS65176RHDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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