Texas Instruments TPS65640RHRR

Overview

TPS65640RHRR from Texas Instruments is an integrated LCD bias power management IC for notebook and tablet PCs, featuring dual boost converters (AVDD up to 11 V, VGH up to 37 V), a buck/LDO regulator (V25: 1.5–3.0 V), a linear negative regulator (VGL: –8 to –3.8 V), programmable 7-bit VCOM calibrator with buffer, two operational amplifiers, gate voltage shaping, and I²C-programmable EEPROM. It delivers precise panel biasing in compact 28-pin QFN.

For engineers reviewing the TPS65640RHRR datasheet, TPS65640RHRR pinout, TPS65640RHRR application, or TPS65640RHRR equivalent, this device supports GIP/non-GIP displays, provides thermal shutdown, programmable VGH/VCOM temperature compensation, reset generation with configurable delay, and full I²C configuration of all output voltages and sequencing parameters.

Technical Context

The TPS65640RHRR integrates five regulated outputs-AVDD (boost, 3.6–11 V), VGH (boost, 15–37 V), VGL (linear negative, –8 to –3.8 V), V25 (buck or LDO, 1.5–3.0 V), and VCOM (programmable 0.8–5.1 V or –4.1–0.2 V)-all configured via I²C and stored in on-chip EEPROM. Its gate voltage shaping block uses FLK/RE/VGHM pins to control LCD gate driver timing with programmable ready delay (0–60 ms).

It includes two rail-to-rail op-amps (AVDD/NAVDD-supplied, ±35 mA continuous output, 12 MHz BW, 12 V/µs slew rate) and a TCON reset generator with eight selectable undervoltage thresholds (1.08–2.86 V) and 0–30 ms delay. All regulators feature soft-start, overvoltage/undervoltage protection, and thermal shutdown at 150°C.

Key Specifications

Pinout & Package

TPS65640RHRR is housed in a 5.5-mm × 3.5-mm, 28-pin QFN package (RHR) with 0.5-mm pitch and exposed thermal pad (PGND3). Pin assignment follows TI's standard top-view layout with dedicated power grounds (PGND1/PGND2/PGND3), switch nodes (LX, VGH_LX, V25_LX), and dual op-amp I/Os.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65640RHRR, TPS65641RHRR offers higher VGH drive and integrated VCOM reference buffering, while RTQ2132B-QT reduces feature set to lower cost but removes key analog functions and timing control essential for flicker-critical displays.

Availability

TPS65640RHRR is available at Aetrix Electronics and suitable for notebook PCs, tablet PCs, and industrial LCD displays requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS65640RHRR 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 precision analog ICs.

The TPS65640RHRR belongs to TI's LCD bias PMIC product line, designed specifically for high-integration, low-noise, and thermally efficient power delivery to advanced LCD panels in portable computing devices.

FAQ

What is the maximum output current capability of the VGH boost converter in TPS65640RHRR?

The VGH boost converter in TPS65640RHRR delivers up to 40 mA output current at 15–37 V. This is specified under recommended operating conditions (IGH = 15–40 mA) and verified across temperature (–40°C to 85°C). The switch current limit is programmable between 0.9 A and 1.5 A, ensuring reliable operation into capacitive LCD gate loads. TPS65640RHRR maintains ±3% output accuracy and <1%/A load regulation within this range.

Does TPS65640RHRR support both GIP and non-GIP LCD displays?

Yes, TPS65640RHRR explicitly supports both GIP and non-GIP displays. Its gate voltage shaping function (via FLK, RE, and VGHM pins) enables controlled VGH ramp-down for GIP panels to suppress crosstalk, while its standard VGH/VGL/AVDD outputs meet requirements for TAB-mounted gate drivers in non-GIP configurations. The datasheet confirms compatibility with both architectures in the Applications section.

How is VCOM voltage programmed and calibrated in TPS65640RHRR?

TPS65640RHRR implements 7-bit programmable VCOM calibration via I²C registers, supporting two ranges: 0.8–5.1 V (for full AVDD systems) or –4.1–0.2 V (for ±AVDD systems). Calibration accuracy is ±2 LSB across temperature and load, with 12 V/µs slew rate and ±20 mA drive capability at VCOM_OUT. The integrated buffer eliminates external op-amp requirements for direct panel connection.

What thermal protection features does TPS65640RHRR include?

TPS65640RHRR incorporates junction-level thermal shutdown at 150°C (TSD), with automatic recovery after cooling. Its RHR package delivers θJA = 37.4°C/W and θJCbot = 1.2°C/W, enabling effective heat dissipation through the exposed PGND3 pad. Thermal metrics are validated per JEDEC JESD51 standards, and the device operates reliably from –40°C to 85°C ambient.

Can TPS65640RHRR operate with a 3.3-V input supply?

Yes, TPS65640RHRR operates with a 3.3-V input supply, which falls within its specified 2.5-V to 5.5-V VIN range. At VIN = 3.3 V, it delivers AVDD = 8.5 V at 400 mA, VGH = 23 V at 40 mA, V25 = 2.5 V at 600 mA (buck mode), and VGL = –6 V - all with verified efficiency (>85% for AVDD), line regulation (±0.15%/V), and load regulation (≤1%/A) per the SLVSCE2 datasheet.