My Inquiry
My Account
Texas Instruments BQ79600PWRQ1
- Part No.:
- BQ79600PWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ79600PWRQ1.pdf
- Description:
- AUTOMOTIVE SPI/UART COMMUNICATIO
- Quantity:
- Payment:
- Shipping:
Inventory:669
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ79600PWRQ1 from Texas Instruments is an automotive-grade SPI/UART communication bridge IC designed to interface microcontrollers with TI's BQ7961X-Q1 battery monitor daisy chain. It supports 4.75–40-V supply, operates from –40°C to +125°C, and enables automatic host wakeup via INH upon fault detection in ring-architecture BMS systems.
For engineers reviewing the BQ79600PWRQ1 datasheet, BQ79600PWRQ1 pinout, BQ79600PWRQ1 application, or BQ79600PWRQ1 equivalent, key selection criteria include ASIL-D functional safety compliance, isolated daisy-chain timing (250 ns pulse width), dual-mode interface selection (hardware-configured UART/SPI), and validated reverse-wakeup capability in 12-V battery-powered HEV/EV systems.
Technical Context
The BQ79600PWRQ1 implements a dual-clock architecture (32 MHz HFO + 262 kHz LFO) for independent timing of daisy-chain tone detection and MCU interface control. Its power-state machine includes COMPLETE OFF, SHUTDOWN, VALIDATE, SLEEP, and ACTIVE modes - each with distinct enablement of COMHP/COMHN tone RX/TX, NFAULT assertion, INH drive, and CVDD/DVDD regulation.
It decodes analog HB/FAULT tones (10.67–12.7 µs inter-pulse intervals) into digital events while generating WAKE/SLP2ACT pings (250–300 µs low-time) for MCU-initiated state transitions. The device uses AC-coupled differential signaling on COML/COMH pins compatible with transformer or capacitor isolation, supporting both linear and ring topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 4.75 V to 40 V - powers internal LDOs and wake-up circuitry directly from 12-V battery or regulated 5-V rail. |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood automotive BMS deployment. |
| Daisy-Chain Timing | 250 ns typical data pulse width - defines minimum bit period for reliable BQ7961X-Q1 family communication. |
| Fault Tone Latency | 24 µs - time from valid FAULT tone reception on COM port to NFAULT assertion, critical for fast system-level fault response. |
| INH Drive Capability | 2 mA sink current, 0.5–1 V drop at –0.5 mA - sufficient to control external PMIC enable inputs in high-voltage battery management units. |
| Shutdown Current | 7–9 µA - ultra-low quiescent draw in SHUTDOWN mode when powered by 5-V or 12-V supply, enabling long-term storage readiness. |
| SPI Clock Frequency | 2–6 MHz - supports high-throughput register access to BQ7961X-Q1 stack without MCU bus contention. |
Pinout & Package
Package: 16-pin TSSOP (PW), 6.6 mm × 5.1 mm body size, no thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | High-voltage supply input | Primary power source for internal LDOs and wake-up logic; must be bypassed with 0.1 µF capacitor. |
| CVDD | Dedicated 5-V daisy-chain supply | Regulated output powering COMHP/COMHN transceivers; requires 0.22 µF decoupling. |
| VIO | I/O voltage reference | Defines logic thresholds for UART/SPI pins; must be applied before driving nCS, SCLK, or TX/MISO. |
| nCS / SCLK / MOSI/RX / MISO/TX | SPI interface signals | Standard SPI bus lines; nCS must be pulled up in SPI mode and grounded in UART mode. |
| nUART/SPI (SPI_RDY) | Interface mode select / ready indicator | Hardware-configured: tied to GND for UART, pulled up to VIO for SPI; outputs SPI_RDY after reset. |
| NFAULT | Open-drain fault indicator | Asserts low on unmasked fault detection; requires external 100 kΩ pull-up to VIO. |
| INH | PMIC inhibit control output | Open-drain HV driver that pulls down to enable system regulators during fault-triggered wakeup. |
| COMHP / COMHN / COMLP / COMLN | AC-coupled daisy-chain I/O | Bidirectional analog ports for transformer/capacitor-isolated communication with BQ7961X-Q1 devices. |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-D Functional Safety Support | Systematic and hardware capability certified per ISO 26262; includes Safety Manual and FSA Report for BMS integration. |
| Automatic Host Wakeup | INH pin drives high within 720 µs of validated fault tone detection - enables immediate MCU recovery from SLEEP/SHUTDOWN without external supervision. |
| Ring Architecture Fault Propagation | Supports single-device ring topology where any node's unmasked fault triggers global wakeup - eliminates need for centralized fault polling. |
| Dual-Mode Interface Selection | Hardware-selectable UART (250 kbps/1 Mbps) or SPI (2–6 MHz) - avoids firmware dependency and ensures deterministic boot-time configuration. |
| EMI-Robust Daisy Chain | AC-coupled differential signaling with 1.04–1.75 V data receiver threshold - rejects common-mode noise in high-voltage battery packs. |
Applications
| Automotive Battery Management System (BMS) | Hybrid/Electric Vehicle Powertrain Control |
|---|---|
Use Scenario: High-voltage battery pack monitoring in OEM EV platforms using TI's BQ7961X-Q1 daisy chain. IC Role / Device Role / Timing Role: Communication bridge translating MCU SPI/UART commands into daisy-chain protocol and relaying fault tones back to host. Use Value: Enables ASIL-D compliant system-level fault response with <24 µs NFAULT latency and automatic INH-driven host wakeup during pack-level faults. | Use Scenario: Integration of battery monitoring into vehicle domain controller with shared MCU resources. IC Role / Device Role / Timing Role: Isolates high-voltage daisy-chain traffic from low-voltage MCU domain using transformer-coupled COM ports. Use Value: Eliminates galvanic coupling between 40-V battery rails and 3.3-V/5-V MCU interfaces while maintaining sub-millisecond wakeup timing. |
| Fuel Cell Stack Monitoring | Industrial Energy Storage Systems |
Use Scenario: Monitoring distributed voltage/current sensors across multi-cell fuel cell stacks requiring robust noise immunity. IC Role / Device Role / Timing Role: Signal translator and fault aggregator interfacing fuel cell supervisory MCU with isolated sensor nodes. Use Value: Leverages 10–12.7 µs tone timing and 1.13–1.94 V tone receiver threshold to reliably detect electrochemical faults amid EMI-rich PEM environments. | Use Scenario: Grid-scale lithium-ion battery racks with centralized BMS controllers managing hundreds of cells. IC Role / Device Role / Timing Role: Scalable communication hub supporting ring or linear daisy chains of BQ7961X-Q1 monitors across multiple modules. Use Value: Reduces MCU polling overhead via automatic fault propagation and supports >100-node stacks using validated 250 ns pulse-width timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar communication bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ79606PWRQ1 | Integrated 6-channel ADC front-end + SPI/UART bridge; higher pin count (32-pin VQFN); includes analog sensing path. | Used where direct cell voltage/temperature acquisition is required alongside daisy-chain bridging. | Select BQ79606PWRQ1 only if on-device analog measurement is needed - BQ79600PWRQ1 provides pure digital bridge functionality with lower BOM cost and smaller footprint. |
| MAX14921EASA+ | Isolated CAN-to-SPI bridge; operates at 3.3 V only; no daisy-chain tone support; no ASIL-D documentation. | Targets industrial CAN-based BMS where TI daisy-chain compatibility is not required. | Choose MAX14921EASA+ only for non-automotive CAN networks - it lacks BQ79600PWRQ1's fault-tone decoding, ring architecture support, and ISO 26262 artifacts. |
Compared with BQ79606PWRQ1, BQ79600PWRQ1 delivers optimized cost and size for pure interface translation without analog front-end overhead; versus MAX14921EASA+, it provides TI ecosystem compatibility, ASIL-D evidence, and daisy-chain-specific timing control essential for automotive BMS.
Availability
BQ79600PWRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, hybrid/electric vehicle powertrain control, and industrial energy storage systems requiring stable component supply across extended product lifecycles.
Supply support for BQ79600PWRQ1 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 automotive, industrial, and power management solutions.
The BQ79600PWRQ1 belongs to TI's BQ796XX-Q1 battery monitor interface product line, engineered specifically to enable functional-safety-compliant, high-reliability communication between MCUs and daisy-chained battery monitoring ICs in electric drivetrain systems.
FAQ
What is the primary function of the BQ79600PWRQ1 in a battery management system?
The BQ79600PWRQ1 serves as a dedicated communication bridge between a microcontroller and TI's BQ7961X-Q1 battery monitor daisy chain. It translates SPI or UART commands from the MCU into the proprietary daisy-chain protocol used by BQ7961X-Q1 devices, and decodes analog fault/heartbeat tones from the daisy chain into digital signals for the MCU. This enables centralized control and real-time fault response without requiring the MCU to manage low-level analog timing.
How does the BQ79600PWRQ1 support functional safety compliance in automotive applications?
The BQ79600PWRQ1 is developed to meet ASIL-D requirements per ISO 26262, with documented systematic capability and hardware capability up to ASIL-D. It includes a Safety Manual and Functional Safety Analysis Report to aid system-level certification. Its automatic fault-triggered wakeup via INH, deterministic timing behavior (e.g., 24 µs NFAULT latency), and dual-clock watchdog (HFO/LFO) architecture provide verifiable safety mechanisms required for automotive BMS deployment.
Can the BQ79600PWRQ1 operate with both UART and SPI interfaces simultaneously?
No, the BQ79600PWRQ1 supports UART or SPI operation, but not both simultaneously. Interface selection is determined at power-up by the hardware state of the nUART/SPI pin: tied to GND for UART mode, pulled up to VIO for SPI mode. Once selected during the transition from SHUTDOWN to ACTIVE, the interface mode is locked until the next reset or power cycle.
What isolation methods are supported for the daisy-chain interface of the BQ79600PWRQ1?
The BQ79600PWRQ1 supports transformer-based or capacitor-based isolation on its COMHP/COMHN/COMLP/COMLN pins. These AC-coupled bidirectional ports are designed for differential signaling and require no DC biasing. TI reference designs confirm compatibility with standard signal transformers (e.g., Pulse PA0765ANL) and high-voltage capacitors (e.g., 1 nF X7R 2 kV), enabling robust galvanic isolation between the MCU domain and high-voltage battery stack.
Does the BQ79600PWRQ1 require external components for basic operation?
Yes, the BQ79600PWRQ1 requires several external components: 0.1 µF capacitor on BAT, 0.22 µF capacitors on CVDD and DVDD, 100 kΩ pull-up on NFAULT, 10–100 kΩ pull-up on nCS (SPI mode) or pull-down on SCLK, and appropriate isolation elements (transformer or capacitor) on COM ports. These are specified in the datasheet's "Power Supply Recommendations" and "Layout Guidelines" sections and are mandatory for stable operation and EMI robustness.
BQ79600PWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Functional Safety (FuSa)
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Interface:
- SPI, UART
- Voltage - Supply:
- 5.5V ~ 24V
- Supplier Device Package:
- 16-TSSOP
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
BQ79600PWRQ1 FAQ
1.How can I place an order for BQ79600PWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ79600PWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ79600PWRQ1 reliable?
The price and inventory of BQ79600PWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ79600PWRQ1 is usually 5 days.
3.What payment methods are accepted for BQ79600PWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ79600PWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ79600PWRQ1?
BQ79600PWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ79600PWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ79600PWRQ1?
For technical support, including BQ79600PWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ79600PWRQ1 requirements.
6.How does Aetrix verify that BQ79600PWRQ1 is sourced from the original manufacturer or authorized distributors?
All BQ79600PWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ79600PWRQ1 meets industry standards.
7.What is the process for return or replacement of BQ79600PWRQ1?
All BQ79600PWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with BQ79600PWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ79600PWRQ1 part is unused and in its original packaging.
Return procedure for BQ79600PWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ79600PWRQ1 Tags
-
NVT4857UKAZ
NXP Semiconductors
-
TCA8418RTWR
Texas Instruments
-
PCA9546APWR
Texas Instruments
-
MD0100N8-G
Microchip Technology
-
PCA9548APW,118
NXP Semiconductors
-
PCA9540BDP,118
NXP Semiconductors
-
PCA9548APWR
Texas Instruments
-
PCA9546APW,118
NXP Semiconductors
-
PTN3360DBS,518
NXP Semiconductors
-
PCA9546ABS,118
NXP Semiconductors
-
PCA9518PWR
Texas Instruments
-
PCA9545APW,118
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
