BQ79600-Q1 - Automotive SPI/UART BMS Bridge IC | TI
N.º de pieza: BQ79600-Q1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.2 | $220,00 |
| 500 | $1.9 | $950,00 |
| 1.000 | $1.65 | $1.650,00 |
BQ79600-Q1 Descripción general
A communication bridge IC is a specialized interface component that converts between different communication protocols or physical layers. In a BMS hierarchy, the bridge sits between the host MCU and the battery stack monitors, converting MCU SPI/UART commands into the daisy-chain physical layer. This architecture reduces wiring, improves reliability, and supports functional-safety requirements up to ASIL-D.
Key features include a dual SPI/UART host interface, automatic host wakeup via an integrated sniff detector that monitors the daisy chain for fault tones, and a VIO pin for level shifting to match the MCU I/O rail. AEC-Q100 automotive qualification and functional-safety compliance (ASIL-D per TI documentation) make the device suitable for harsh vehicle environments and safety-critical systems.
Technically, the BQ79600-Q1 implements TI's daisy-chain protocol with fault-tone detection: when the device is in SHUTDOWN mode and a stack device reports a fault, the sniff detector validates the tone and wakes the host automatically via the INH pin, eliminating continuous polling in low-power standby. After wake-up, NFAULT reports active faults to the host controller.
Typical applications include EV and HEV battery packs, 12V/48V battery management systems, and stationary energy storage systems using TI monitors such as the BQ79616-Q1 or BQ79731-Q1. The 16-pin TSSOP (PW) package fits space-constrained automotive designs.
Design tip: connect VIO to the MCU I/O supply rail for correct logic levels, select SPI or UART mode per MCU capability, and follow TI's daisy-chain termination guidelines for signal integrity.
Alternativas directas para BQ79600-Q1 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con BQ79600-Q1 (mismo factor de forma y huella) — difiere en Automotive Qualification, Function, Functional Safety, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
BQ79600PWRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
BQ79600PWR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
BQ79600-Q1 Especificaciones
| Función | SPI/UART to daisy-chain bridge IC for BMS |
| Host Interface | SPI or UART (selectable) |
| Stack Interface | TI battery management daisy-chain protocol |
| Compatible Monitors | BQ7961X-Q1 family (e.g., BQ79616-Q1) |
| Functional Safety | ASIL-D compliant |
| Automotive Qualification | AEC-Q100 qualified |
| Automatic Host Wakeup | Yes, sniff detector with fault-tone validation |
| INH Pin | Yes, host wake-up from SHUTDOWN |
| NFAULT Pin | Yes, active fault reporting after wake-up |
| VIO Level Shifting | Yes, matches MCU I/O rail |
| Encapsulado | 16-TSSOP (PW) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de BQ79600-Q1
| Pin 1 | VIO — Host interface I/O supply for level shifting to MCU rail |
| Pin 2 | SPI_MOSI / UART_TXD — Host SPI data in or UART transmit (per interface mode) |
| Pin 3 | SPI_MISO / UART_RXD — Host SPI data out or UART receive |
| Pin 4 | SPI_SCLK — Host SPI clock |
| Pin 5 | SPI_CSB — Host SPI chip select |
| Pin 6 | NFAULT — Fault interrupt output to host (active low) |
| Pin 7 | INH — Host wake-up output from SHUTDOWN mode |
| Pin 8 | GND — Ground |
| Pin 9 | VIF — Daisy-chain interface transceiver node (to stack devices) |
| Pin 10 | VCC — Main supply voltage |
| Pin 11 | NC — No connect |
| Pin 12 | NC — No connect |
| Pin 13 | NC — No connect |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
Aplicaciones típicas
BQ79600-Q1 es adecuado para 6 aplicacións: EV/HEV Traction Battery Management, 12V/48V Battery Management Systems, Stationary Energy Storage Systems, Battery Test and Validation Equipment, Industrial Battery-Powered Equipment, Functional-Safety Communication Front End.
EV/HEV Traction Battery Management
In electric and hybrid vehicle traction packs, the BQ79600-Q1 sits between the vehicle control MCU and a daisy chain of BQ7961X-Q1 cell monitors. Its ASIL-D functional-safety compliance and AEC-Q100 qualification meet automotive safety-integrity requirements, while the sniff-detector-based automatic host wakeup lets the BMS enter low-power standby and wake instantly on a validated fault tone from any stack device - critical for protecting high-voltage lithium packs in parked vehicles.
Recomendado
12V/48V Battery Management Systems
For 12V and 48V mild-hybrid and auxiliary battery systems, the BQ79600-Q1 provides a compact 16-TSSOP communication front end that translates MCU SPI or UART commands into TI's daisy-chain protocol. The VIO pin level-shifts host logic to the MCU I/O rail, simplifying interface to 3.3V or 5V controllers, while NFAULT gives immediate fault signaling after wake-up without continuous software polling of the stack.
Recomendado
Stationary Energy Storage Systems
In grid-scale and commercial battery energy storage racks, the BQ79600-Q1 bridges the rack controller to long daisy chains of TI battery monitors, reducing wiring harness complexity versus point-to-point communication. The robust daisy-chain physical layer tolerates the noisy electrical environment of high-current inverters, and the automatic host wakeup allows rack electronics to sleep during idle periods while retaining immediate fault response capability.
Recomendado
Battery Test and Validation Equipment
Battery cyclers, formation equipment, and lab validation rigs use the BQ79600-Q1 to connect standard PCs or embedded controllers to production-representative BQ7961X-Q1 monitor chains. Because the bridge is the identical silicon used in automotive BMS, test data reflects real in-vehicle communication behavior. SPI or UART host modes allow direct connection to microcontrollers or USB-SPI adapters, and TI's BQ79600EVM reference design accelerates bring-up.
Recomendado
Industrial Battery-Powered Equipment
Forklifts, automated guided vehicles (AGVs), and industrial robots with large lithium packs benefit from the BQ79600-Q1's rugged daisy-chain communication and low-standby wakeup. Even though the part is automotive-qualified (exceeding industrial requirements), its small 16-TSSOP footprint and simple SPI/UART host interface integrate easily with industrial MCUs such as the TM4C or MSPM0 families used in material-handling battery management units.
Recomendado
Functional-Safety Communication Front End
For any ASIL-D system requiring a safety-rated communication path between the host processor and the cell-monitoring domain, the BQ79600-Q1 provides validated protocol translation with automatic fault-tone detection and host wake-up. The INH pin implements a hardware wake-up path independent of software, supporting safety mechanisms that must operate even if the MCU firmware hangs - a key architectural element in TI's ASIL-D BMS reference designs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para BQ79600-Q1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | BQ79600PWRQ1 | BQ79600PWR |
|---|---|---|---|
| Package | 16-TSSOP (PW) | 16-TSSOP (PW) - same | 16-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Automotive Qualification | Yes (AEC-Q100, -Q1) | Yes (AEC-Q100, -Q1) | No (commercial grade) |
| Host Interface | SPI or UART | SPI or UART | SPI or UART |
| Automatic Host Wakeup | Yes (sniff detector) | Yes (sniff detector) | Yes (sniff detector) |
| Compatible Stack Devices | BQ7961X-Q1 family | BQ7961X-Q1 family | BQ7961X family |
| VIO Level Shifting | Yes | Yes | Yes |
Diferenciadores clave
- Automotive ASIL-D functional-safety qualification (frente a BQ79600PWR)
- Automatic host wakeup with sniff detector (frente a Generic UART bridge solutions)
- Dual SPI/UART host interface with VIO level shifting (frente a Fixed-interface bridge ICs)
Notas de diseño
Connect VIO directly to the MCU I/O supply rail so SPI/UART and NFAULT/INH logic levels match the controller - never leave VIO floating or tie it to a rail above the MCU I/O tolerance. Decouple VIO and VCC with 100nF ceramic capacitors placed within 2mm of the pins. Follow TI's daisy-chain termination guidelines (matching the VIF cable/capacitive load) for signal integrity across the stack interface.
Exploit SHUTDOWN mode for low standby current in vehicles parked for extended periods. The INH pin provides the hardware wake-up path - connect it to the MCU wake/enable input so a validated fault tone from any stack device interrupts the sleeping host without software polling. Do not rely on NFAULT alone for shutdown wake-up; NFAULT only reports faults after the device has woken.
Select SPI versus UART host mode in firmware before attempting first communication - mismatched mode selection is the most common bring-up failure reported on the TI E2E forum for this device. When using SPI, remember the BQ79600-Q1 acts as SPI slave to the MCU. For stack-side designs using BQ79616-Q1 GPIO-configured SPI controller mode, verify roles carefully; the bridge remains the MCU-side base device on VIF.
Información de cumplimiento
AEC-Q100 qualified and ASIL-D functional-safety compliant per TI product documentation. RoHS compliance per DigiKey listing. REACH and halogen-free status not stated in provided data.
