Texas Instruments BQ3060PW

Overview

BQ3060PW from Texas Instruments is a single-chip, SBS 1.1-compliant battery manager IC for 2–4 series Li-ion/Li-polymer packs, integrating coulomb counting (15-bit effective resolution), dual ADCs (16-bit delta-sigma + integrator), and hardware-based overcurrent/short-circuit protection. It delivers gas gauging via CEDV algorithm, SHA-1 authentication, and external cell balancing drive - deployed in netbook battery packs requiring precise capacity reporting and dual-level safety.

For engineers reviewing the BQ3060PW datasheet, BQ3060PW pinout, BQ3060PW application, or BQ3060PW equivalent, this page provides verified technical context on SMBus 1.1 interface timing (up to 400 kHz), P-channel FET drive specs (VO(FETON) ≥12 V), SRP/SRN coulomb counter input range (–0.20 V to +0.25 V), and thermal shutdown behavior (TMAX = 125–175 °C).

Technical Context

The BQ3060PW implements a dual-ADC architecture: one 15–22-bit integrator ADC dedicated to coulomb counting across SRP/SRN with ±10 μV offset error, and a second 16-bit delta-sigma ADC with 16-channel mux for simultaneous cell voltage (VC1–VC4), temperature (TS1/TS2), and PACK/BAT monitoring. Its 8-bit RISC CPU executes CEDV gauging firmware and supports programmable protection thresholds via internal flash memory.

Protection logic operates at two levels: software-configurable first-level responses (e.g., CHG/DSG FET disable on overvoltage) and hardware-triggered second-level actions (FUSE pin activation for permanent disable on safety overtemperature or AFE register integrity fault). All FET drives (CHG, DSG, ZVCHG) are P-channel high-side with 70–200 µs rise/fall times and VO(FETON) ≥12 V at 20 V pack voltage.

Key Specifications

Pinout & Package

Package: 24-pin TSSOP (PW), body size 4.4 mm × 7.8 mm, 0.65 mm pitch, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery management applications.

Compared with BQ3060PW, BQ3050PW omits ZVCHG and balancing drive - limiting use to simpler 2–3 cell systems - while BQ30Z55DBTR replaces discrete FET control with integrated switches and adds impedance-based gauging, increasing accuracy but requiring new layout and firmware adaptation.

Availability

BQ3060PW is available at Aetrix Electronics and suitable for netbook battery packs, medical portable device power systems, and industrial handheld analyzer designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical applications.

Supply support for BQ3060PW 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 battery management solutions, with over 40 years of power management innovation.

The BQ3060PW belongs to TI's bq30xx family of smart battery managers, designed specifically for cost-sensitive, space-constrained 2–4 cell Li-ion packs requiring SBS 1.1 compliance, hardware safety redundancy, and flash-based configuration flexibility.

FAQ

What is the primary function of the BQ3060PW in a battery pack?

The BQ3060PW serves as a fully integrated battery manager IC that performs real-time coulomb counting, cell voltage and temperature monitoring, CEDV-based gas gauging, SMBus 1.1 communication, and dual-level (software + hardware) protection for 2–4 series Li-ion/Li-polymer battery packs. It directly controls CHG, DSG, and ZVCHG FETs and supports SHA-1 authentication to prevent counterfeit pack usage.

Does the BQ3060PW support zero-volt charging, and how is it implemented?

Yes, the BQ3060PW supports zero-volt charging via its dedicated ZVCHG pin (Pin 22), which drives a P-channel pre-charge FET. When enabled, ZVCHG allows safe trickle charging of deeply discharged cells (down to 0 V) before initiating normal CC/CV charging - critical for recovering abused Li-ion cells without risking copper shunting.

How does the BQ3060PW handle cell balancing, and what external components are required?

The BQ3060PW provides external cell balancing drive on VC1–VC4 pins, each capable of sinking current through an external FET/resistor network. Internal pull-down resistances range from 0.85 kΩ (VC4) to 5.7 kΩ (VC1) when active. No balancing MOSFETs are integrated - external discrete FETs and resistors must be added per cell to implement voltage-based passive balancing during charge.

What are the SMBus timing limits and fail-safe mechanisms built into the BQ3060PW?

The BQ3060PW supports SMBus 1.1 up to 400 kHz in high-speed programming mode. It enforces strict timing: tTIMEOUT = 25–35 ms for bus error detection, tLOW/MEXT ≤300 ns for master extension, and tLOW/SEXT ≤10 ms for slave extension. A continuous 5 s SMBus idle triggers auto-calibration, and violation of tHIGH (>50 µs) resets ongoing transactions - ensuring robust communication in noisy environments.

Can the BQ3060PW operate without external calibration, and what is its default voltage accuracy?

Yes, the BQ3060PW ships factory-calibrated for voltage measurement. With 1 kΩ filter resistors on VC1–VC4, it achieves ±10 mV accuracy per cell at 4 V and 25 °C. This eliminates the need for customer voltage calibration in standard applications. For improved accuracy across temperature, optional user calibration is supported via SMBus commands documented in SLUA502.