Texas Instruments TPS65680RSNT

Overview

TPS65680RSNT from Texas Instruments is a 18-channel programmable high-voltage level shifter for LCD panel gate driver (GIP/GOA) interfaces, featuring 12 high-voltage clock outputs (GCK1–GCK12), 6 high-voltage control outputs (GSP1/GSP2, GCP, GGP1/GGP2, VSS), and integrated overcurrent protection. It operates with VIN = 2.8–5.5 V, VGH = 9–40 V, and dual negative supplies VGL1/VGL2 = –4 to –18 V, and supports pattern-based timing generation via internal nonvolatile memory or real-time I²C configuration.

For engineers reviewing the TPS65680RSNT datasheet, TPS65680RSNT pinout, TPS65680RSNT application, or TPS65680RSNT equivalent, this device serves as a flexible, programmable replacement for fixed-pattern level shifters in small-volume or nonstandard LCD designs-enabling one PCB to support multiple display panels without TCON reprogramming or layout changes.

Technical Context

The TPS65680RSNT implements a user-programmable sequencer that generates output timing based on stored pattern tables, synchronized to LN_CLK (40 kHz–15 MHz) and LS_START frame triggers. Its digital core uses an internal oscillator (2 MHz) and PLL (3–15 MHz output range) to derive precise SEQ_CLK for channel sequencing.

It integrates independent overcurrent sensing per supply rail (VGH, VGL1, VGL2), with configurable thresholds (20–320 mA in 20-mA steps), alarm counters (ALARM1 for clocks, ALARM2 for controls), and fault recovery requiring full power cycle. Panel discharge is executed in two programmable phases triggered by LS_CNTRL falling edge.

Key Specifications

Pinout & Package

TPS65680RSNT is housed in a 4.0 mm × 4.0 mm, 32-pin WQFN package (Texas Instruments RSN) with exposed thermal pad connected to VGL2. Pin functions are validated per TI SLVSE46A datasheet Rev A (January 2018).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LCD gate driver level shifter applications.

Compared with TPS65680RSNT, TPS65682RSNT adds analog functionality at the expense of increased layout complexity, while MAX16972ATL+T sacrifices programmability for lower unit cost-making TPS65680RSNT the optimal balance of flexibility, integration, and scalability for mid-volume or multi-panel designs.

Availability

TPS65680RSNT is available at Aetrix Electronics and suitable for LCD panel biasing, GOA/GIP timing control, and industrial display power management requiring stable component supply across design-in, prototyping, and volume production phases.

Supply support for TPS65680RSNT 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, embedded processing, and power management ICs, with leadership in display interface and power solutions for consumer and industrial markets.

The TPS65680RSNT belongs to TI's LCD bias and timing controller PMIC family, designed specifically to replace fixed-function gate driver level shifters in GIP/GOA-based LCD panels-enabling programmable, scalable, and panel-agnostic display subsystems.

FAQ

What is the primary function of the TPS65680RSNT in an LCD system?

The TPS65680RSNT serves as a programmable high-voltage level shifter that converts low-voltage timing signals from the timing controller (TCON) into 12 high-voltage clock outputs and 6 high-voltage control signals for driving gate-integrated (GOA/GIP) LCD panels. It replaces fixed-pattern ASICs with field-configurable timing, enabling one PCB to support multiple display variants without hardware changes.

Does the TPS65680RSNT require external configuration memory?

No-the TPS65680RSNT includes on-chip nonvolatile memory capable of storing user-defined pattern sequences and configuration registers. After power-up, it automatically loads these defaults, eliminating the need for external EEPROM or SPI flash. Configuration can also be updated dynamically via I²C interface during operation.

How does the TPS65680RSNT handle panel discharge during power-down?

The TPS65680RSNT executes a two-phase panel discharge sequence triggered by a falling edge on LS_CNTRL. In DISCHARGE STEP1, outputs are driven to safe states (e.g., GCK high, others low); after a programmable delay (D1_TIME), DISCHARGE STEP2 activates VSS and toggles remaining channels to fully discharge the panel. Both phases are configurable via PNL_DCH1/PNL_DCH2 registers.

Can multiple TPS65680RSNT devices share the same I²C bus?

Yes-each TPS65680RSNT has an I2CSEL pin that selects between slave addresses 0x42 (I2CSEL = low) and 0x43 (I2CSEL = high). This allows up to two devices to operate on the same I²C bus without address conflict, supporting applications needing more than 12 clock outputs or redundant control paths.

What protection features are integrated into the TPS65680RSNT?

The TPS65680RSNT integrates overcurrent protection (OCP) on VGH, VGL1, and VGL2 rails with user-adjustable thresholds (20–320 mA), thermal shutdown (130–150°C), undervoltage lockout (UVLO) on all supplies, and Level Shifter Power-Good (LSPG) supervision. If any monitored rail fails, the device halts outputs and initiates panel discharge to prevent LCD damage.