Texas Instruments TPS65145IPWPRQ1

Overview

TPS65145IPWPRQ1 from Texas Instruments is an automotive-grade triple-output LCD power supply IC integrating a 1.6-MHz boost converter (VO1 up to 15 V/350 mA), a negative charge pump (VO2 down to –12 V/20 mA), a positive charge pump (VO3 up to 30 V/20 mA), and a 3.3-V linear regulator controller - all in a single TSSOP-24 PowerPAD™ package. It delivers precise, sequenced rail generation for TFT-LCD biasing in automotive instrument clusters.

For engineers reviewing the TPS65145IPWPRQ1 datasheet, TPS65145IPWPRQ1 pinout, TPS65145IPWPRQ1 application, or TPS65145IPWPRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 2.7–5.8 V input range, integrated soft-start and power-good signaling, and distinct 1.37-A main switch current limit distinguishing it from the TPS65140-Q1 variant.

Technical Context

The TPS65145IPWPRQ1 implements a fixed-frequency voltage-mode PWM boost controller with input feedforward for <0.2% load regulation and uses external loop compensation. Its virtual synchronous topology combines an internal N-MOSFET (Q1) and P-MOSFET (Q2) with an external Schottky diode to sustain continuous conduction mode across full load range - eliminating switching-node ringing and simplifying EMI filtering.

It features independent enable control (EN for main rails, ENR for LDO controller), three regulated feedback loops (FB1 for VO1, FB2 for VO2, FB3 for VO3), and a dedicated open-drain PG output that asserts high only when all three outputs are within ±10% of nominal. The C2−/MODE pin selects voltage-doubler (C2− grounded) or tripler (C2− connected to flying cap) operation for VO3.

Key Specifications

Pinout & Package

TSSOP-24 PowerPAD™ package (4.40 mm × 7.80 mm) with exposed thermal die connected to PGND pins (7, 8) for enhanced thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS65140IPWPRQ1, the TPS65145IPWPRQ1 offers lower switch current (1.37 A vs. 2.3 A) for optimized efficiency at typical automotive LCD loads, while the TPS65136QPWPRQ1 reduces integration to meet minimal biasing needs - enabling trade-offs between channel count, thermal budget, and board area.

Availability

TPS65145IPWPRQ1 is available at Aetrix Electronics and suitable for infotainment systems, instrument clusters, and rear seat entertainment requiring stable component supply across automotive production lifecycles.

Supply support for TPS65145IPWPRQ1 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 ICs for automotive, industrial, and consumer applications.

The TPS6514x-Q1 product line delivers integrated LCD bias solutions for automotive displays, designed to replace discrete DC/DC and charge pump combinations while meeting AEC-Q100 reliability and thermal requirements.

FAQ

What is the maximum output current capability of the VO1 boost converter in the TPS65145IPWPRQ1?

The TPS65145IPWPRQ1 VO1 boost converter delivers up to 350 mA at 15 V output. Its internal N-MOSFET switch has a typical current limit of 1.37 A, providing sufficient headroom for transient loads and ensuring stable regulation under varying panel capacitance and temperature conditions. This rating is validated across the full –40°C to +125°C junction temperature range per AEC-Q100 Grade 1 requirements.

How does the C2−/MODE pin affect the operation of the TPS65145IPWPRQ1?

The C2−/MODE pin on the TPS65145IPWPRQ1 determines whether the positive charge pump (VO3) operates in voltage-doubler or voltage-tripler mode. When tied to GND, it configures the pump as a doubler (VO3 ≈ 2 × VO1); when connected to the flying capacitor, it enables tripler mode (VO3 ≈ 3 × VO1). This pin directly controls internal switch routing and must not be left floating to prevent undefined VO3 regulation behavior.

Does the TPS65145IPWPRQ1 provide independent control for its linear regulator controller?

Yes, the TPS65145IPWPRQ1 includes a dedicated ENR pin (Pin 23) that independently enables or disables the 3.3-V linear regulator controller. This allows the VO4 rail to remain active even if the main boost and charge pump outputs are shut down due to fault conditions - preserving system logic functionality and communication capability during partial power failures.

What protection features are integrated into the TPS65145IPWPRQ1?

The TPS65145IPWPRQ1 integrates per-rail short-circuit detection, VO1 overvoltage protection (typically +5%), VO2/VO3 undervoltage lockout (–9.5% and –8%, respectively), and thermal shutdown at 160°C. All protections trigger automatic shutdown; recovery requires toggling EN low then high or cycling VIN below UVLO (2.4 V). No external components are needed to activate these functions.

Can the TPS65145IPWPRQ1 be used in non-automotive applications?

While the TPS65145IPWPRQ1 is AEC-Q100 qualified and optimized for automotive environments, its electrical specifications - including 2.7–5.8 V input, 1.6-MHz switching, and triple-output architecture - are fully functional in industrial or medical LCD applications. However, its Grade 1 temperature rating and automotive-specific ESD robustness provide added margin beyond commercial-grade alternatives.