Texas Instruments TPS65155RKPR

Overview

TPS65155RKPR from Texas Instruments is a highly integrated LCD bias power management IC for active-matrix LCD monitors and notebook panels. It integrates a 3–6 V input boost converter (up to 18 V/300 mA), temperature-compensated positive charge pump (VGH = +9 V/20 mA), negative charge pump (VGL = –6 V/20 mA), and a 4-phase XAO level shifter with reset output (RESETOUT). It delivers complete gate/source driver biasing in a single 40-pin QFN package.

For engineers reviewing the TPS65155RKPR datasheet, TPS65155RKPR pinout, TPS65155RKPR application, or TPS65155RKPR equivalent, key selection criteria include its 4+2 channel level shifter architecture, thermal shutdown protection, programmable soft-start, selectable 640 kHz/1.2 MHz switching frequency, and -40°C to +85°C industrial operating range.

Technical Context

The TPS65155RKPR implements a synchronous boost converter with 4-A switch current limit and overvoltage protection, feeding AVDD for source drivers. Its temperature-compensated positive charge pump dynamically reduces VGH at elevated temperatures to prevent gate oxide stress, while the dedicated negative charge pump generates stable VGL. The 4-phase level shifter supports XAO timing with precise edge control for TFT gate line activation.

Supply sequencing is managed via external EN signal, and the active-low RESETOUT provides system-level XAO reset coordination. All functions operate within a single 5×5 mm VQFN-40 package with NIPDAU lead finish and MSL Level-2 rating.

Key Specifications

Pinout & Package

TPS65155RKPR is housed in a 40-pin VQFN (RKP) package measuring 5.00 mm × 5.00 mm with 0.4 mm pitch and 1 mm max height. The exposed thermal pad enhances power dissipation for sustained bias delivery.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD bias generator applications.

Compared with TPS65150RGER and RTQ2132B-QA, the TPS65155RKPR uniquely combines temperature-compensated VGH, integrated 4-phase XAO level shifting, and industrial temperature range in a single 5×5 mm footprint-making it optimal for high-reliability commercial LCD monitors where gate oxide stress mitigation and timing integration are critical.

Availability

TPS65155RKPR is available at Aetrix Electronics and suitable for LCD monitor power management, notebook panel biasing, and industrial display control requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for TPS65155RKPR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and interface solutions.

The TPS65155RKPR belongs to TI's LCD bias power management product line, designed specifically to consolidate gate/source driver power generation and timing interface functions for flat-panel displays.

FAQ

What is the maximum allowable input voltage for the TPS65155RKPR?

The TPS65155RKPR supports an input voltage range of 3 V to 6 V only. Exceeding 6 V on the IN pin may trigger overvoltage protection or cause permanent damage. This range is optimized for compatibility with standard 3.3 V or 5 V system rails and eliminates need for upstream pre-regulation in most LCD monitor designs. Always verify input rail stability and transient behavior per Section 7.3 of the TPS65155RKPR datasheet.

Does the TPS65155RKPR provide built-in thermal protection?

Yes, the TPS65155RKPR includes internal thermal shutdown circuitry that disables all outputs when the junction temperature exceeds approximately 150°C. Recovery occurs automatically once the die cools below the hysteresis threshold (~140°C). This feature protects both the TPS65155RKPR and connected gate driver ICs during sustained high-load or poor heatsinking conditions. Thermal performance is validated under JEDEC JESD51-2 standards.

How does temperature compensation work on the VGH output of the TPS65155RKPR?

The TPS65155RKPR implements analog temperature compensation on its positive charge pump to reduce VGH output linearly above 25°C-typically ~12 mV/°C-preventing excessive gate oxide stress at elevated ambient temperatures. This function is fully internal and requires no external components or configuration. It directly improves long-term reliability of TFT panels in enclosed or high-power-density displays.

Can the TPS65155RKPR be used without connecting the EN pin?

No-the EN pin must be pulled high to VDD (via resistor or direct logic high) for normal operation. Leaving EN floating or unconnected results in undetermined state and prevents internal regulators from powering up. TI recommends using a 100 kΩ pull-up to AVDD or a controlled GPIO signal to ensure proper power sequencing. This requirement is documented in Section 8.3.3 of the TPS65155RKPR datasheet.

What is the purpose of the RESETOUT pin on the TPS65155RKPR?

The RESETOUT pin on the TPS65155RKPR provides an active-low, open-drain reset signal synchronized to internal power-good status and sequencing events. It asserts low during startup until AVDD, VGH, and VGL reach valid regulation thresholds, then releases to high-impedance. This signal coordinates XAO initialization in gate driver ICs and ensures display firmware starts only after stable bias is established.