Texas Instruments BQ25713BRSNT

Overview

BQ25713BRSNT from Texas Instruments is a synchronous I²C-controlled NVDC buck-boost battery charge controller for 1s–4s Li-ion/Li-polymer batteries, supporting 3.5 V–24 V input, ±0.5% charge voltage regulation, IMVP8/IMVP9-compliant PROCHOT output, and USB OTG (3 V–20.8 V, 8-mV resolution) - deployed in ultrabooks, detachable tablets, and industrial portable equipment.

For engineers reviewing the BQ25713BRSNT datasheet, BQ25713BRSNT pinout, BQ25713BRSNT application, or BQ25713BRSNT equivalent, key selection criteria include NVDC power path behavior, dual-mode PROCHOT throttling (input/battery/system), Pass Through Mode efficiency, Vmin Active Protection (VAP) for peak-load support, and compatibility with USB PD 3.0 PPS-compliant OTG voltage slew control.

Technical Context

The BQ25713BRSNT implements a four-switch buck-boost topology with automatic mode transition (buck → buck-boost → boost) based on real-time VBUS and battery voltage, enabling seamless source adaptation without host intervention. Its integrated ADC monitors VBUS, VSYS, IBAT, IADPT, and PSYS with programmable gain and resolution.

It delivers IMVP8/IMVP9-compliant PROCHOT signaling via dedicated open-drain output, supports hardware-based input current limiting via ILIM_HIZ pin, and features TI's patented Pass Through Mode (PTM) to bypass conversion losses during high-power adapter operation while maintaining fast charging capability.

Key Specifications

Pinout & Package

Package: 32-pin 4 mm × 4 mm WQFN (RSN) with exposed thermal pad soldered to PCB ground plane for thermal management (R_θJB = 7.8 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ25713RSNT, BQ25713BRSNT adds IMVP9-specific PROCHOT register enhancements and improved VDPM hysteresis tuning; versus BQ25718RSNT, it retains VAP for peak-load absorption but omits the integrated LDO - making it optimal for high-dynamic-range portable computing.

Availability

BQ25713BRSNT is available at Aetrix Electronics and suitable for ultrabooks, industrial portable test equipment, and medical point-of-care monitors requiring stable component supply, long-term lifecycle support, and IEC 62368-1 certified power management.

Supply support for BQ25713BRSNT 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 leader specializing in analog, embedded processing, and power management ICs, with decades of expertise in battery charging and system power architecture.

The BQ25713BRSNT belongs to TI's BQ257xx family of NVDC buck-boost chargers, designed specifically for space-constrained, high-efficiency portable computing platforms requiring intelligent power path control and CPU-coordinated thermal management.

FAQ

What is the primary function of the BQ25713BRSNT in a portable computing system?

The BQ25713BRSNT serves as the core battery charge controller and system power manager in portable computing devices. It regulates input power from USB-C PD adapters or legacy sources, charges 1s–4s Li-ion batteries with ±0.5% voltage accuracy, maintains stable system voltage via NVDC architecture, and coordinates CPU thermal throttling through IMVP8/IMVP9-compliant PROCHOT signaling - all within a 4 mm × 4 mm WQFN package. The BQ25713BRSNT enables instant-on operation even with no or depleted battery.

How does the BQ25713BRSNT implement Vmin Active Protection (VAP) and why is it critical?

The BQ25713BRSNT implements VAP by pre-charging input decoupling capacitors from the battery during idle periods, then discharging that stored energy during sudden CPU or GPU power spikes to prevent VSYS from collapsing below the minimum system voltage (as low as 3.584 V). This avoids brownouts and system crashes during high-SOC transient loads - a requirement explicitly recommended by Intel for 1s–2s battery platforms. The BQ25713BRSNT activates VAP automatically when only battery powers the system and OTG/VAP pin is asserted high.

Does the BQ25713BRSNT support USB Power Delivery 3.0 Programmable Power Supply (PPS)?

Yes, the BQ25713BRSNT supports USB PD 3.0 PPS through its USB OTG functionality: it generates VBUS from battery in 3.0 V–20.8 V range with 8-mV resolution and configurable voltage transition slew rate - matching PPS voltage step and ramp requirements. This enables compliant negotiation with PPS-enabled sinks (e.g., smartphones, earbuds) without external controllers. The BQ25713BRSNT achieves this using internal DACs and timing registers accessible via I²C, not relying on host firmware for PPS compliance.

What safety certifications does the BQ25713BRSNT hold, and how do they impact system-level approval?

The BQ25713BRSNT holds IEC 62368-1 CB Certification, confirming compliance with international safety standards for audio/video, information, and communication technology equipment. This certification covers internal protections including thermal shutdown, input/system/battery overvoltage protection, and MOSFET/inductor overcurrent detection. For end-equipment manufacturers, this reduces validation effort and accelerates regulatory approval - especially critical for medical and industrial portable devices where BQ25713BRSNT is commonly deployed.

Can the BQ25713BRSNT operate without I²C host control, and what functions remain active?

Yes, the BQ25713BRSNT operates autonomously without I²C host control for core power functions: automatic buck/buck-boost/boost mode transitions, NVDC power path management, input voltage/current regulation (IDPM/VDPM), PROCHOT assertion, and USB OTG activation via hardware pin (OTG/VAP). However, advanced features like programmable PROCHOT profiles, VAP timing, OTG slew rate, and PSYS gain calibration require I²C configuration. The BQ25713BRSNT defaults to safe, functional operation - e.g., 12.6-V system regulation and 3-A input limit - on power-up without host interaction.