Texas Instruments BQ7693003DBTR

Overview

BQ7693003DBTR from Texas Instruments is a 6- to 10-series Li-ion and LiFePO₄ battery monitor AFE with integrated cell balancing FETs, low-side charge/discharge FET drivers, and dual thermistor support. It delivers ±15 mV cell voltage accuracy (25°C), 14-bit ADC resolution, and hardware-based overvoltage/undervoltage/overcurrent protection for high-power battery packs up to 36 V nominal.

For engineers reviewing the BQ7693003DBTR datasheet, BQ7693003DBTR pinout, BQ7693003DBTR application, or BQ7693003DBTR equivalent, this device serves as a complete analog front-end for industrial-grade battery management systems requiring I²C-controlled monitoring, protection, and passive balancing without EEPROM programming.

Technical Context

The BQ7693003DBTR implements a dedicated 14-bit SAR ADC for cell voltage and die temperature sensing, plus a separate 16-bit coulomb counter ADC for pack current measurement across SRP–SRN. Its architecture supports random cell connection tolerance and independent thermistor biasing for TS1 (VSS-referenced) and TS2 (VC5X-referenced).

Protection logic executes in hardware with configurable delay timers: OV/UV thresholds set via 16-LSB steps (0x1000–0x2FF8), OCD/SCD detection using programmable mV thresholds (8–100 mV OCD, 22–200 mV SCD), and thermal shutdown at 100–150°C. The device operates from 6 V to 36 V supply and enters SHIP mode at ≤1.8 µA quiescent current.

Key Specifications

Pinout & Package

Package: 30-pin TSSOP (DBT), 7.80 mm × 4.40 mm × 1.20 mm body size, lead pitch 0.65 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BQ7693003DBTR, BQ7694003DBTR extends cell count and thermal sensing capability while maintaining identical protection logic and I²C interface, whereas MAX17853GCM+ trades integrated LDO and lower quiescent current for daisy-chain scalability and automotive qualification - making each optimal for distinct voltage, topology, and compliance requirements.

Availability

BQ7693003DBTR is available at Aetrix Electronics and suitable for light electric vehicles, power tools, and battery backup units requiring stable component supply, long-term lifecycle support, and TI-qualified AFE performance.

Supply support for BQ7693003DBTR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The BQ769x0 family targets high-reliability battery monitoring in demanding applications like e-mobility and energy storage, emphasizing hardware-based protection, ultra-low-power SHIP mode, and factory-configured simplicity.

FAQ

What is the maximum number of series cells supported by the BQ7693003DBTR?

The BQ7693003DBTR supports 6 to 10 series-connected lithium-ion or lithium iron phosphate cells, enabling use in 36-V nominal battery packs. Its pinout includes dedicated VC0 through VC10 inputs, with VC5B serving as the reference for the upper half of the stack. This configuration is validated for operation up to 36 V supply and withstands transients up to 108 V on the BAT pin.

Does the BQ7693003DBTR require external EEPROM programming for basic operation?

No, the BQ7693003DBTR does not require external EEPROM programming. Texas Instruments preconfigures the device with fixed parameters including I²C address (0x08), LDO output voltage (2.5 V), and CRC enablement. These settings are permanently stored in on-chip memory and cannot be modified in the field - enabling immediate integration into BMS designs without configuration overhead.

How does the BQ7693003DBTR handle thermistor connections for temperature monitoring?

The BQ7693003DBTR supports two independent thermistor inputs: TS1 referenced to VSS and TS2 referenced to VC5X. Each accepts standard 10-kΩ 103AT NTC thermistors with internal 10-kΩ pull-up biasing. Unused thermistor inputs must be pulled down to their respective ground references (VSS for TS1, VC5X for TS2) using a 10-kΩ resistor to ensure accurate ADC conversion and avoid floating node errors.

What protection features are implemented in hardware versus firmware on the BQ7693003DBTR?

The BQ7693003DBTR implements overvoltage (OV), undervoltage (UV), overcurrent in discharge (OCD), and short-circuit in discharge (SCD) entirely in hardware - with configurable thresholds and delay timers that operate independently of the host MCU. This ensures fail-safe response even if the system controller is unresponsive or powered down, meeting critical safety requirements for industrial and transportation battery systems.

What is the cell voltage measurement accuracy specification for the BQ7693003DBTR across temperature?

The BQ7693003DBTR provides ±15 mV cell voltage accuracy at 25°C for the 3.2–4.6 V range, degrading to ±35 mV across the full –40°C to +85°C operating range. This specification is guaranteed by TI's manufacturing calibration and applies to all 10 cell inputs (VC0–VC10), enabling reliable state-of-charge estimation and cell imbalance detection in real-world thermal environments.