Texas Instruments TPS25840QWRHBRQ1

Overview

TPS25840QWRHBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive USB Type-A BC1.2 charging IC integrating a synchronous buck regulator (4.5–36 V input, 5.1 V ±1% output, 3.5 A), cable droop compensation up to 1.5 V, and high-bandwidth DP/DM analog switches. It delivers stable 5-V power to portable devices in infotainment systems under heavy load and variable cabling conditions.

For engineers reviewing the TPS25840QWRHBRQ1 datasheet, TPS25840QWRHBRQ1 pinout, TPS25840QWRHBRQ1 application, or TPS25840QWRHBRQ1 equivalent, key selection criteria include its integrated VBUS short-to-VBAT protection on DP_IN/DM_IN pins, ±8-kV IEC 61000-4-2 ESD rating on data lines, and support for FPWM with spread-spectrum dithering across 300 kHz–2.2 MHz switching frequency range.

Technical Context

The TPS25840QWRHBRQ1 implements current-mode control with internal compensation and supports both resistor-programmed (RT/SYNC pin) and external clock synchronization modes. Its dual-threshold current limit architecture enables either average-current limiting of the buck stage or NMOS-based overcurrent protection via LS_GD gate driver.

It integrates USB BC1.2 CDP/SDP detection logic, client-mode firmware update capability, and precision current sensing for programmable cable compensation. The device provides dedicated short-to-VBAT protection on VBUS, DP_IN, and DM_IN-functionality exclusive to the TPS25840-Q1 variant and absent in TPS25842-Q1.

Key Specifications

Pinout & Package

TPS25840QWRHBRQ1 uses a 32-pin VQFN package (RHB0032AA) with 5.00 mm × 5.00 mm body size and wettable flanks for automated optical inspection. Thermal pad is electrically connected to PGND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB charging controller applications.

Compared with TPS25842QWRHBRQ1, TPS25840QWRHBRQ1 adds critical short-to-VBAT protection on data lines-essential for automotive reliability-while sharing identical buck performance and package. Against TPS65987DQVQR, it trades USB-C PD flexibility for guaranteed BC1.2 interoperability and simpler system integration in legacy Type-A architectures.

Availability

TPS25840QWRHBRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, USB media hubs, and OEM USB charger ports requiring stable component supply across extended temperature and ESD stress conditions.

Supply support for TPS25840QWRHBRQ1 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 automotive ICs, with leadership in power management and interface solutions.

The TPS2584x-Q1 product line delivers integrated USB charging controllers for automotive applications, combining synchronous buck regulation, BC1.2 compliance, and robust data-line protection in a single AEC-Q100 qualified device.

FAQ

What is the maximum input voltage rating for the TPS25840QWRHBRQ1?

The TPS25840QWRHBRQ1 has an absolute maximum input voltage rating of 40 V on the IN pin relative to PGND, with recommended operating range from 4.5 V to 36 V. This accommodates automotive battery transients including cold-crank (down to 4.5 V) and load-dump (up to 36 V), ensuring robust operation across vehicle electrical conditions. The device remains functional within this full range while delivering regulated 5.1-V output.

Does the TPS25840QWRHBRQ1 support USB BC1.2 CDP and SDP detection modes?

Yes, the TPS25840QWRHBRQ1 natively supports USB Battery Charging Specification 1.2 CDP (Charging Downstream Port) and SDP (Standard Downstream Port) detection modes. It implements the required electrical signatures on DP_IN and DM_IN pins-including VDM_SRC generation and windowed voltage thresholds-to automatically identify connected device types without host processor involvement. This enables plug-and-play charging compatibility with legacy smartphones and tablets.

How does cable droop compensation work in the TPS25840QWRHBRQ1?

The TPS25840QWRHBRQ1 implements linear cable droop compensation by increasing its buck output voltage proportionally with load current, using a precision current sense amplifier and external IMON resistor. With RIMON = 13 kΩ, it delivers up to 1.065 V of compensation-counteracting up to 1.5 V of IR drop in automotive cabling. This ensures the VBUS voltage measured at the connected device remains stable near 5.1 V, enabling optimal battery charging even at 3.5-A load.

What protection features are unique to the TPS25840QWRHBRQ1 versus TPS25842QWRHBRQ1?

The TPS25840QWRHBRQ1 uniquely integrates short-to-VBAT protection on DP_IN and DM_IN pins-allowing them to withstand up to 18 V-while the TPS25842QWRHBRQ1 lacks this feature. Both share VBUS short-to-VBAT protection, but only TPS25840QWRHBRQ1 protects the data lines against battery fault coupling. This distinction is critical in automotive designs where unshielded USB harnesses may be exposed to battery rail faults.

What is the switching frequency range and synchronization capability of the TPS25840QWRHBRQ1?

The TPS25840QWRHBRQ1 supports an adjustable switching frequency from 300 kHz to 2.2 MHz via the RT/SYNC pin. When configured with a resistor to ground, it operates in free-running mode; when driven with an external clock signal exceeding the PLL threshold (≥3.5 V), it synchronizes to that clock. This flexibility allows designers to avoid AM radio bands (>2.1 MHz), optimize efficiency (<400 kHz), or align switching with system clocks for EMI reduction.