BQ76952Q-Q1 - 3-16S Battery Monitor AEC-Q100 | Texas Instruments
N.º de pieza: BQ76952Q-Q1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.26 | $3,26 |
| 10 | $2.94 | $29,40 |
| 100 | $2.72 | $272,00 |
| 500 | $2.45 | $1.225,00 |
| 1.000 | $2.18 | $2.180,00 |
BQ76952Q-Q1 Descripción general
A battery monitor and protector is the analog front end (AFE) of a battery management system: it measures each cell's voltage and pack current, detects overvoltage, undervoltage, overcurrent, and over-temperature fault conditions, and drives protection FETs to isolate the pack. It sits above the cell connections and below the pack MCU in the BMS hierarchy, offloading safety-critical measurement and protection from the host processor.
Key features include support for up to 16 series cells, an extensive protection suite covering voltage, temperature, current, and internal diagnostics, two independent ADCs for simultaneous monitoring, and an integrated charge pump enabling high-side NFET protection with optional autonomous recovery. High-accuracy cell voltage monitoring enables precise state-of-charge and state-of-health estimation, critical for maximizing usable capacity and pack lifetime.
Architecturally, the device can operate autonomously in a stand-alone mode or under host control via I2C/SPI communication with an external MCU, providing flexibility between cost-optimized and feature-rich BMS topologies. The high-side FET driver topology keeps the load negative terminal at pack ground, simplifying system-level design versus low-side approaches.
Typical applications include electric vehicle (EV) and hybrid battery packs, e-bikes and e-scooters, energy storage systems (ESS), UPS battery backup, and power tools. The Q1 qualification and wide automotive temperature support make it a fit for traction and auxiliary battery packs.
Design consideration: configure the protection thresholds and balancing registers carefully in firmware, and follow TI's pin-equivalent guidance (SLUAAF2) for the high-voltage cell input pins, which include specialized internal circuitry and require proper series input resistors.
Alternativas directas para BQ76952Q-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 BQ76952Q-Q1 (mismo factor de forma y huella) — difiere en Cell Balancing, FET Drivers, Operating Temperature, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
BQ76952PFBR
✅ Sustitución directa✓ En stock
$2.67 / unidad
Ver hoja de datos →BQ76942PFBR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
BQ769142
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
BQ76972
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BQ76952Q-Q1 Especificaciones
| Cell Count | 3-series to 16-series |
| Battery Chemistry | Li-ion, Li-polymer, LiFePO4 |
| Función | Battery monitor and protector (BMS AFE) |
| ADCs | 2 independent ADCs |
| Protection Suite | Voltage, temperature, current, internal diagnostics |
| Cell Balancing | Autonomous or host controlled |
| FET Drivers | Integrated high-side charge-pump NFET drivers |
| Encapsulado | 48-TQFP (7x7 mm) |
| Temperatura de funcionamiento | -40C to +85C |
| Automotive Qualification | AEC-Q100 (Q1) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
| Supply Type | Single supply, pack-powered |
| Recovery Mode | Optional autonomous protection recovery |
Configuración de pines de BQ76952Q-Q1
| Pin 1 | VC16 (highest cell input) — [DATA_NEEDED: exact pin map - refer to datasheet Section 6] |
| Pin 2-17 | VC15-VC0 / CAP1-CAP3 — [DATA_NEEDED: exact pin map - refer to datasheet Section 6] |
| Pin 48 | BAT / REG pin group — [DATA_NEEDED: exact pin map - refer to datasheet Section 6] |
Aplicaciones típicas
BQ76952Q-Q1 es adecuado para 6 aplicacións: Electric Vehicle Battery Packs, Energy Storage Systems (ESS), E-Bikes and E-Scooters, UPS Battery Backup, Power Tools Battery Packs, Telecom Base Station Backup Batteries.
Electric Vehicle Battery Packs
The BQ76952Q-Q1's AEC-Q100 qualification and 16S support make it a primary BMS AFE for EV and hybrid traction and auxiliary packs. Its two independent ADCs continuously monitor cell voltages while the configurable protection subsystem handles overvoltage, undervoltage, overcurrent, and over-temperature events, and the integrated high-side charge-pump NFET drivers isolate the pack without external driver circuitry. Firmware-configurable thresholds allow reuse of the same silicon across multiple pack platforms, reducing qualification effort.
Recomendado
Energy Storage Systems (ESS)
For residential and commercial ESS packs in the 48V (13S-16S) class, the BQ76952Q-Q1 provides high-accuracy cell measurement needed for precise state-of-charge estimation and maximum usable capacity. The autonomous protection mode allows the pack to protect itself even if the host MCU hangs, and host-controlled balancing optimizes capacity over thousands of cycles. The 48-TQFP footprint and single-silicon protection plus driver integration shorten BMS board design cycles.
Recomendado
E-Bikes and E-Scooters
Light electric vehicles typically use 10S-13S packs, squarely inside the BQ76952Q-Q1's 3S-16S range. The integrated protection suite with autonomous recovery handles charge and discharge faults without host intervention, improving safety in cost-sensitive designs, while the high-side FET topology keeps the load return at ground potential. LiFePO4 chemistry support covers durable commuter packs as well as standard Li-ion.
Recomendado
UPS Battery Backup
Data center and industrial UPS systems rely on series Li-ion strings where early fault detection prevents catastrophic failure. The BQ76952Q-Q1's internal diagnostic protections complement voltage, current, and temperature monitoring, and its two ADC architecture supports continuous surveillance. Autonomous protection with optional recovery maintains pack availability during transient events, which is essential for always-on backup power applications.
Recomendado
Power Tools Battery Packs
High-discharge power tool packs in the 3S-12S range benefit from the BQ76952Q-Q1's current and temperature protections, which guard against overcurrent during stall conditions typical in drills and saws. The autonomous recovery option allows temporary overcurrent events to clear without user service. Host-controlled balancing via an embedded MCU keeps series cell states matched for maximum runtime over pack life.
Recomendado
Telecom Base Station Backup Batteries
48V telecom backup strings (typically 13S LiFePO4) use the BQ76952Q-Q1's LiFePO4 support and high-accuracy monitoring to maximize cycle life in outdoor cabinets. Its -40C to +85C operating range and AEC-Q100 robustness withstand harsh site environments, while the integrated protection subsystem simplifies compliance with telecom battery safety requirements. The TQFP package supports compact smart-battery board designs.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para BQ76952Q-Q1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | BQ76952PFBR | BQ76942PFBR | BQ769142 |
|---|---|---|---|---|
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same | 48-TQFP (7x7) - same family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Max Cell Count | 16S | 16S | 10S | 10S |
| Chemistry Support | Li-ion, Li-polymer, LiFePO4 | Li-ion, Li-polymer, LiFePO4 | Li-ion, Li-polymer, LiFePO4 | Li-ion, Li-polymer, LiFePO4 |
| High-Side NFET Drivers | Yes, integrated charge pump | Yes | Yes | Yes |
| Cell Balancing | Autonomous or host controlled | Autonomous or host controlled | Autonomous or host controlled | Host controlled |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Diferenciadores clave
- Automotive qualification (frente a BQ76952PFBR)
- 16S maximum cell count (frente a BQ76942PFBR)
- Integrated high-side charge-pump NFET drivers (frente a ADI LTC6813)
Notas de diseño
Cell input pins are high-voltage pins with specialized internal circuitry. TI application report SLUAAF2 provides pin-equivalent diagrams for the BQ76952, BQ76942, and BQ769142 family - follow it when selecting series input resistors and protection components on VC0-VC16. Keep cell input routing symmetrical and place RC filters close to the device to preserve measurement accuracy.
The integrated high-side charge-pump NFET drivers eliminate the need for an external driver supply, but verify gate-drive capability against your selected protection FETs' total gate charge at minimum pack voltage. Ensure the REG/supply pin decoupling follows the datasheet recommended capacitor values so the charge pump and ADCs operate within spec during FET switching transients.
Protection thresholds, delays, and balancing behavior are firmware-configurable - do not assume defaults suit your chemistry. LiFePO4 requires distinctly different OV/UV limits than Li-ion. Also confirm whether your variant operates in autonomous or host-controlled mode; mixing modes can leave protection features unconfigured at startup. Validate with TI's BQStudio evaluation hardware before production.
Información de cumplimiento
AEC-Q100 qualification from Q1 designation per TI product data. RoHS compliant per distributor listings (DigiKey).
