Texas Instruments BQ25710RSNT

Overview

BQ25710 from Texas Instruments is a synchronous NVDC buck-boost battery charge controller for 1s–4s Li-ion/Li-polymer systems, featuring 3.5–24-V input operation, ±0.5% charge voltage regulation, SMBus interface, and integrated power/current monitoring for IMVP8/IMVP9-compliant CPU throttling in ultra-thin notebooks.

For engineers reviewing the BQ25710 datasheet, BQ25710 pinout, BQ25710 application, or BQ25710 equivalent, key selection considerations include its seamless buck/buck-boost/boost transition, Pass Through Mode (PTM) for system efficiency, Vmin Active Protection (VAP) for peak power handling, and 32-pin 4×4 mm WQFN package with thermal pad.

Technical Context

The BQ25710 implements a four-switch buck-boost topology with independent high-side and low-side gate drivers (HIDRV1/HIDRV2/LODRV1/LODRV2), enabling automatic mode transitions without host intervention. It integrates dual current-sense amplifiers (IADPT, IBAT) and a system power monitor (PSYS) with programmable gain for real-time adapter/battery/system power tracking.

Its NVDC architecture maintains regulated VSYS at battery voltage while enforcing minimum system voltage via BATDRV-controlled P-FET ideal diode operation. The device supports PROCHOT generation based on configurable thresholds for input current, battery discharge, and system voltage - directly compliant with Intel IMVP8/IMVP9 specifications.

Key Specifications

Pinout & Package

Package: 32-pin WQFN (RSN), 4.00 mm × 4.00 mm, with exposed thermal pad soldered to PCB ground plane for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar buck-boost battery charge controller applications.

Compared with BQ25700A, the BQ25710 adds critical IMVP9 features (VAP, PTM) and safety certification; compared with BQ25713B, it retains SMBus compatibility essential for Intel platform integration - making it the optimal choice for new ultra-book and medical designs requiring both compliance and interoperability.

Availability

BQ25710 is available at Aetrix Electronics and suitable for ultra-thin notebooks, portable medical monitors, and USB-PD power banks requiring stable component supply, long-term lifecycle support, and certified safety compliance.

Supply support for BQ25710 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 portable and industrial applications.

The BQ25710 belongs to TI's battery charge controller product line, designed specifically for space-constrained, high-efficiency NVDC architectures in Intel- and ARM-based portable platforms requiring IMVP8/IMVP9 compliance and USB PD readiness.

FAQ

What is the primary function of the BQ25710 in a notebook power architecture?

The BQ25710 serves as a synchronous NVDC buck-boost battery charge controller that manages power flow between input sources (USB PD, AC adapters), battery, and system rail (VSYS). It enables instant-on operation from depleted batteries, seamless buck/boost transitions, and IMVP8/IMVP9-compliant PROCHOT signaling - all within the BQ25710's integrated architecture without external controllers.

Does the BQ25710 support USB On-The-Go (OTG) functionality, and what are its key OTG specifications?

Yes, the BQ25710 supports USB OTG mode, generating an adjustable 3.0–20.8 V output on VBUS with 8-mV resolution and current limiting up to 6.4 A in 50-mA steps. This meets USB PD 3.0 PPS requirements and is fully programmable via SMBus registers - a capability confirmed in the BQ25710 datasheet Section 5 and Table 6.

How does the BQ25710 implement Vmin Active Protection (VAP), and which applications benefit most?

The BQ25710 implements VAP by pre-charging input decoupling capacitors from the battery during idle periods, then releasing stored energy during system peak power spikes to maintain VSYS above minimum voltage. This feature is explicitly designed for Intel IMVP9 platforms with 1s–2s batteries and is critical in ultra-books and medical monitors where sudden CPU or display loads must not cause brownout.

What safety certifications does the BQ25710 hold, and how do they impact end-equipment design?

The BQ25710 holds IEC 62368-1 CB certification, validating its compliance with international safety standards for audio/video, information, and communication technology equipment. This certification reduces end-equipment qualification effort for consumer notebooks, industrial tablets, and portable medical devices - a requirement explicitly listed in the BQ25710's Features section (Revision B, April 2023).

Is the BQ25710 pin-compatible with earlier TI buck-boost chargers, and what firmware changes are needed?

Yes, the BQ25710 is pin-to-pin and software compatible with the BQ25700A, sharing identical pinout, register map, and SMBus address (0x09). However, firmware must enable new features like VAP and PTM via updated register writes (e.g., REG0x32[5] for OTG/VAP mode), as documented in the BQ25710 datasheet Section 9.3 and Table 6 device comparison.