Texas Instruments TPS65140PWP

Overview

TPS65140PWP from Texas Instruments is a triple-output LCD power supply IC integrating a 1.6-MHz boost converter (VO1 up to 15 V / 400 mA), regulated negative charge pump (VO2 down to –12 V / 20 mA), regulated positive charge pump (VO3 up to 30 V / 20 mA), and a 3.3-V linear regulator controller - all in a single 24-pin HTSSOP package for TFT LCD source/gate driver biasing.

For engineers reviewing the TPS65140PWP datasheet, TPS65140PWP pinout, TPS65140PWP application, or TPS65140PWP equivalent, key selection considerations include its fault-detection shutdown behavior (vs. TPS65141), 2.7–5.8 V input range, integrated soft-start and power-on sequencing, and compatibility with small 220-nF flying capacitors due to 1.6-MHz charge pump operation.

Technical Context

The TPS65140PWP implements a fixed-frequency voltage-mode PWM boost converter with virtual synchronous operation using an external Schottky diode and internal P-MOSFET (Q2) to maintain continuous conduction mode across load conditions. Its feedback architecture uses a 1.213-V internal reference and supports adjustable VO1 via FB1 with <1% typical output accuracy.

All three regulated outputs - VO1 (boost), VO2 (negative charge pump), and VO3 (positive charge pump) - feed independent error amplifiers and are monitored by a shared open-drain PG signal that asserts low if any output deviates >10% from nominal. The device includes thermal shutdown (160°C), UVLO (2.4 V), and per-rail undervoltage lockout thresholds for fault protection.

Key Specifications

Pinout & Package

TPS65140PWP is housed in a 24-pin HTSSOP (PWP) package measuring 7.80 mm × 4.40 mm with exposed PowerPAD™ thermal pad connected to PGND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65141PWP and TPS65145PWP, the TPS65140PWP uniquely combines full fault detection shutdown, highest switch current rating (2.3 A), and guaranteed ±10% PG monitoring - making it the preferred choice for safety-critical, high-reliability TFT LCD applications.

Availability

TPS65140PWP is available at Aetrix Electronics and suitable for TFT LCD notebook displays, automotive infotainment systems, and industrial HMI panels requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS65140PWP 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, designing analog and embedded processing chips for industrial, automotive, and consumer applications.

The TPS6514x product line was developed specifically to consolidate multiple power rails required by TFT LCD panels into a single IC - reducing solution size, improving reliability, and simplifying design for display manufacturers.

FAQ

What is the maximum output current capability of the TPS65140PWP's main boost converter (VO1)?

The TPS65140PWP's main boost converter delivers up to 400 mA at VO1. This is supported by its 2.3-A typical switch current limit and internal N-MOSFET with 290-mΩ rDS(on) at 10 V output. Performance depends on input voltage, inductor value (recommended 4.7 µH), and thermal management - derating applies above 85°C ambient.

Does the TPS65140PWP support both voltage doubler and tripler configurations for the positive charge pump (VO3)?

Yes, the TPS65140PWP supports both configurations via the C2–/MODE pin. When grounded, it operates as a voltage doubler; when connected to a flying capacitor, it functions as a voltage tripler. This flexibility allows VO3 to scale from ~2×VO1 to ~3×VO1 - essential for matching diverse TFT panel gate voltage requirements.

How does the TPS65140PWP differ from the TPS65141PWP in fault handling?

The TPS65140PWP enters full shutdown if any output (VO1, VO2, or VO3) falls outside ±10% of its nominal value, while the TPS65141PWP continues operating without shutdown. This makes the TPS65140PWP appropriate for safety-critical displays where rail integrity must be enforced, whereas TPS65141PWP suits applications needing uninterrupted VO4 during transient faults.

Can the TPS65140PWP's 3.3-V linear regulator controller (VO4) operate independently of the other outputs?

Yes, the TPS65140PWP's VO4 linear regulator controller operates independently via the ENR pin. It remains active even when the main boost converter or charge pumps are disabled or in fault-induced shutdown - enabling continuous digital logic power for microcontrollers or timing circuits during panel power faults.

What thermal management features does the TPS65140PWP include?

The TPS65140PWP incorporates junction thermal shutdown at 160°C, a PowerPAD™ thermal pad tied to PGND for enhanced heat dissipation, and thermal metrics including RθJA = 37.2°C/W (HTSSOP). Proper PCB copper pour under the PowerPAD and connection to multiple PGND vias are required to sustain full 400-mA VO1 output at 85°C ambient.