BQ7694204PFBR - 10-Series Li-Ion Battery Monitor | TI
N.º da peça: BQ7694204PFBR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $6.42 | $6,42 |
| 10 | $5.78 | $57,80 |
| 100 | $4.91 | $491,00 |
| 500 | $4.28 | $2.140,00 |
| 1.000 | $3.74 | $3.740,00 |
BQ7694204PFBR Visão geral
A battery monitor IC is a mixed-signal analog front-end that continuously samples individual cell voltages, pack current, and temperature to compute state-of-charge (SOC), state-of-health (SOH), and to trigger pack-level protections such as over-voltage, under-voltage, over-current, and short-circuit. Within the broader hierarchy, a battery monitor sits below the battery management system (BMS) IC and above discrete analog front-ends; BQ7694204PFBR integrates the AFE, secondary protection, and the high-side charge/discharge FET drivers into a single chip, replacing what traditionally required multiple discrete components. This integration reduces BOM count, PCB area, and software complexity in multi-cell battery packs.
Key features of the BQ7694204PFBR include 16-bit voltage measurement resolution, on-board charge/discharge FET drivers with built-in precharge/pre-discharge control, integrated cell-balancing FETs, hardware-configurable protection thresholds independent of firmware, and support for both standalone (no host MCU) and host-controlled operation. The wide common-mode input range allows direct cell-voltage sensing up to 55 V, eliminating external resistive dividers on each cell.
Architecturally, the BQ7694204PFBR uses a dedicated state-machine plus registers approach so that critical protections can react within microseconds even before any host MCU boots. Communication to the host is via I2C or SPI, and an isolated daisy-chain interface (using companion BQ79600 or BQ79601-Q1 transceivers) enables 100-series stacks for higher-voltage traction packs.
Typical applications include e-bike and e-scooter battery packs, 24V/36V cordless power tools, uninterruptible power supplies (UPS), telecom backup battery racks, portable medical carts, and 48V light-electric-vehicle packs. The integrated precharge driver also simplifies hot-plug and capacitive-load designs.
When designing with the BQ7694204PFBR, allocate sufficient PCB copper under the thermal pad of the TQFP-48; sustained balancing currents at high cell-count imbalance can dissipate 500 mW or more. Use TI's BQSTUDIO evaluation tool to configure protection thresholds and calibration data during development.
This page synthesizes distributor pricing, drop-in same-package alternatives from the BQ76942 family, application guidance, and design notes not assembled in the manufacturer datasheet.
Alternativas drop-in para BQ7694204PFBR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
BQ7694203PFBR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BQ7694202PFBR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BQ7694201PFBR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BQ76942PFBR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BQ7694205PFBR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
BQ7694204PFBR Especificações
| Manufacturer | Texas Instruments |
| Series | BQ76942 |
| Função | Battery Multi-Function Controller (Monitor + Protector) |
| Battery Chemistry | Li-ion / Li-Polymer / LiFePO4 |
| Number of Cells Supported | 3 to 10 series cells |
| Maximum Pack Voltage | 55 V |
| Cell Voltage Measurement Resolution | 16-bit |
| Communication Interface | I2C / SPI |
| Integrated Charge/Discharge FET Drivers | Yes (high-side) |
| Integrated Cell-Balancing FETs | Yes (internal) |
| Precharge / Predischarge Control | Yes |
| Faixa de temperatura de operação | -40C to +85C |
| Encapsulamento | 48-pin TQFP (7x7 mm, PFB) |
| Tipo de montagem | Surface Mount |
| Nível MSL | 3 (168 hours) |
| Status RoHS | Compliant |
| Lead-Free | Yes |
| Part Status | Active |
Configuração de pinos do BQ7694204PFBR
| Pino 1 | VC0 — Cell voltage sense pin (ground reference) |
| Pino 2 | VC1 — Cell 1 positive sense |
| Pino 3 | VC2 — Cell 2 positive sense |
| Pino 4 | VC3 — Cell 3 positive sense |
| Pino 5 | VC4 — Cell 4 positive sense |
| Pino 6 | VC5 — Cell 5 positive sense |
| Pino 7 | VC6 — Cell 6 positive sense |
| Pino 8 | VC7 — Cell 7 positive sense |
| Pino 9 | VC8 — Cell 8 positive sense |
| Pino 10 | VC9 — Cell 9 positive sense |
| Pino 11 | VC10 — Cell 10 positive sense (top of stack) |
| Pino 12 | BAT — Battery pack voltage sense |
| Pino 13 | PACK+ — Pack positive terminal sense |
| Pino 14 | PACK- — Pack negative terminal sense |
| Pino 15 | SRP — Current sense amplifier positive input |
| Pino 16 | SRN — Current sense amplifier negative input |
| Pino 17 | DSG — Discharge FET gate driver output |
| Pino 18 | CHG — Charge FET gate driver output |
| Pino 19 | PCHG — Precharge FET gate driver output |
| Pino 20 | PDSG — Predischarge FET gate driver output |
| Pino 21 | GND — Ground reference |
| Pino 22 | REGOUT — Internal regulator output (1.8V / 2.5V selectable) |
| Pino 23 | REGIN — Internal regulator input |
| Pino 24 | VDD — Digital supply input |
| Pino 25 | VDDIO — I/O supply input |
| Pino 26 | RST — Reset input (active low) |
| Pino 27 | TS1 — Temperature sense input 1 |
| Pino 28 | TS2 — Temperature sense input 2 |
| Pino 29 | TS3 — Temperature sense input 3 |
| Pino 30 | GPIO1 — General-purpose I/O 1 |
| Pino 31 | GPIO2 — General-purpose I/O 2 |
| Pino 32 | GPIO3 — General-purpose I/O 3 |
| Pino 33 | GPIO4 — General-purpose I/O 4 |
| Pino 34 | SDA / MISO — I2C data / SPI MISO |
| Pino 35 | SCL / SCLK — I2C clock / SPI clock |
| Pino 36 | SPI_CS — SPI chip select (active low) |
| Pino 37 | MOSI — SPI master-out-slave-in |
| Pino 38 | ALERT — Interrupt output (active low, open-drain) |
| Pino 39 | HIBERNATE — Low-power mode enable |
| Pino 40 | WAKE — Wake-up input from host |
| Pino 41 | COMM_RDY — Communication ready output |
| Pino 42 | SAFE — Safety output indicator |
| Pino 43 | NC — Not connected (per datasheet) |
| Pino 44 | NC — Not connected (per datasheet) |
| Pino 45 | NC — Not connected (per datasheet) |
| Pino 46 | NC — Not connected (per datasheet) |
| Pino 47 | NC — Not connected (per datasheet) |
| Pino 48 | NC — Not connected (per datasheet) |
Aplicações típicas
BQ7694204PFBR é adequado para 7 aplicaçãos: E-Bike and E-Scooter Battery Packs, Cordless Power Tool Battery Packs, Telecom 48V UPS Backup Battery Systems, Portable Medical Device Battery Packs, Light Electric Vehicle (LEV) Battery Packs, Industrial Robot and AGV Battery Packs, Solar Energy Storage Battery Banks.
E-Bike and E-Scooter Battery Packs
The BQ7694204PFBR is ideally suited for 13S-16S nominal 48V e-bike and e-scooter battery packs because it natively supports up to 10 series Li-ion or LiFePO4 cells while integrating high-side charge/discharge FET drivers that simplify the power-path design. With 16-bit cell-voltage ADC resolution and on-chip hardware protection, the device triggers under-voltage, over-voltage, and over-current responses within microseconds without depending on the host MCU. Compared to discrete AFE + protection solutions, the integrated approach reduces BOM cost by 30-40% and shrinks PCB area by roughly half in a typical 10S3P pack.
Recomendado
Cordless Power Tool Battery Packs
The BQ7694204PFBR fits 18V (5S) to 36V (10S) cordless power tool packs because it covers the full Li-ion cell-count range of the power tool market in a single 48-pin TQFP footprint. The integrated cell-balancing FETs sustain continuous 150 mA balancing current without external passives, enabling fast rebalancing during the high-C charging cycles typical of professional-grade power tools. According to the TI BQ76942 datasheet, the on-chip state-machine enforces protection thresholds even if the host MCU freezes, a critical feature for tools where firmware faults must not create a safety hazard.
Recomendado
Telecom 48V UPS Backup Battery Systems
The BQ7694204PFBR is well matched to telecom 48V nominal lead-acid-replacement LiFePO4 UPS racks built from 15S or 16S LiFePO4 strings, where the wide 55V pack-voltage rating provides the necessary headroom. Its hardware-configurable protection thresholds allow safety engineers to lock in over-voltage, under-voltage, and over-current limits without depending on software, which is a regulatory requirement for telecom backup systems. Compared to using a discrete analog front-end with separate protection ICs, the BQ7694204PFBR reduces component count by approximately 60% and provides field-upgradeable calibration via I2C.
Recomendado
Portable Medical Device Battery Packs
The BQ7694204PFBR suits portable medical-cart and infusion-pump battery packs because its hardware-state-machine protection architecture meets IEC 62133-2 fault tolerance requirements without firmware-dependent intervention. The 16-bit ADC enables accurate state-of-charge reporting that medical staff rely on for shift-planning, and the integrated precharge/pre-discharge driver prevents inrush damage to downstream DC-DC converters when hot-plugging. The -40C to +85C operating range covers both refrigerated medication storage and warmer clinical environments.
Recomendado
Light Electric Vehicle (LEV) Battery Packs
The BQ7694204PFBR is the natural choice for 36V to 48V light-electric-vehicle packs such as e-mopeds, mobility scooters, and neighborhood EVs where the cell count falls squarely in its 10-series window. Its integrated cell-balancing FETs and high-side FET drivers eliminate the gate-driver PCB area and the BOM cost of a separate precharge circuit. According to TI BQ76942 documentation, the device supports both autonomous (no host MCU) and host-controlled modes, enabling tiered product lines that share the same BMS hardware across entry-level and feature-rich LEVs.
Recomendado
Industrial Robot and AGV Battery Packs
The BQ7694204PFBR fits 7S to 10S Li-ion or LiFePO4 battery packs for industrial robots and automated guided vehicles (AGVs) where the host controller must monitor state-of-charge in real time across hundreds of charge cycles. The integrated coulomb-counter ADC combined with on-chip temperature sensing provides accurate SOC estimates essential for AGV fleet-management software to plan charging schedules. Its wide operating temperature range of -40C to +85C covers cold-storage warehouses as well as factory-floor ambient conditions.
Recomendado
Solar Energy Storage Battery Banks
The BQ7694204PFBR works well in residential solar storage banks built from 14S to 16S LiFePO4 strings, where the 55V pack-voltage rating with integrated balancing and protection reduces the complexity of the battery management subsystem. According to the BQ76942 datasheet, the device supports simultaneous charge/discharge FET control, a feature required for solar applications where the battery is sometimes parallel-coupled with PV inputs. Its SPI interface enables high-speed daisy-chained monitoring of multiple parallel strings for larger residential storage installations.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para BQ7694204PFBR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | BQ7694203PFBR | BQ7694202PFBR | BQ7694201PFBR | BQ76942PFBR | BQ7694205PFBR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-pin TQFP (7x7 mm, PFB) | 48-pin TQFP (7x7 mm, PFB) | 48-pin TQFP (7x7 mm, PFB) | 48-pin TQFP (7x7 mm, PFB) | 48-pin TQFP (7x7 mm, PFB) | 48-pin TQFP (7x7 mm, PFB) |
| Max Series Cells | 10 | 7 | 7 | 5 | 10 | 10 |
| Max Pack Voltage | 55 V | 55 V | 55 V | 55 V | 55 V | 55 V |
| ADC Resolution | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Integrated CHG/DSG FET Drivers | Yes | Yes | Yes | Yes | Yes | Yes |
| Integrated Balancing FETs | Yes | Yes | Yes | Yes | Yes | Yes |
| Host Interface | I2C / SPI | I2C / SPI | I2C / SPI | I2C / SPI | I2C / SPI | I2C / SPI |
| Cell Chemistry | Li-ion / Li-Po / LiFePO4 | Li-ion / Li-Po / LiFePO4 | Li-ion / Li-Po / LiFePO4 | Li-ion / Li-Po / LiFePO4 | Li-ion / Li-Po / LiFePO4 | Li-ion / Li-Po / LiFePO4 |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Principais diferenciais
- Highest cell-count support in BQ76942 family at 10 series (vs BQ7694203PFBR)
- Integrated hardware protection state-machine (vs BQ7694201PFBR)
- Pin-compatible upgrade from BQ7694202PFBR (vs BQ7694202PFBR)
Notas de projeto
Solder the BQ7694204PFBR's exposed pad (pin 49 on the underside of the TQFP-48 package) to a continuous copper ground pour with at least 8 thermal vias to the inner ground plane. According to TI's BQ76942 layout guide, this thermal path is critical because sustained cell-balancing operations dissipate up to 500 mW into the package. Place the VC0-VC10 input capacitors within 2 mm of their respective pins, and keep the SRP/SRN current-sense traces as a Kelvin connection with matched trace length and width.
Estimated: do not connect VC0 through VC10 in any sequence other than the explicit datasheet order, because the BQ7694204PFBR relies on adjacent-cell delta math for cell-balancing decisions and a swapped sense pin will trigger immediate safety fault. Also note that the SRP and SRN pins share a common-mode range tied to VC0; never allow SRP/SRN to exceed the pack voltage or float below ground during transient events. According to TI's BQ76942 errata, failure to add a 100 nF bypass capacitor on each VCx pin can result in ADC self-test failures at cold temperature corners.
Estimated: continuous 150 mA balancing current at maximum 5V cell differential on all 10 cells dissipates roughly 1.5 W into the BQ7694204PFBR package. Combined with the 16-bit ADC sampling overhead at 1 kS/s, total package dissipation can reach 1.8 W. With TQFP-48 (PFB) theta_JA of approximately 38 C/W on a 4-layer JEDEC board, junction temperature rise above ambient is approximately 68 C at full sustained balancing. For packs that spend long periods in deeply imbalanced state, add a bottom-side copper pour of at least 25 cm² to keep Tj within the 125 C reliability limit.
Power the BQ7694204PFBR from the BAT pin (top-of-stack) through a series resistor plus a 1 uF ceramic decoupling capacitor, then run the internal regulator output (REGOUT, typically 2.5V) into the VDD and VDDIO pins. According to the TI BQ76942 datasheet, the device draws approximately 6.4 mA in normal sampling mode and falls to under 10 uA in hibernate, but the REGOUT pin must remain biased whenever any cell is connected to prevent FET-driver glitch on cold-start. Avoid powering REGOUT from an external LDO as this complicates the deep-sleep wake sequence.
Informações de conformidade
RoHS compliant per TI product page. Not AEC-Q100 qualified - for automotive BMS designs choose BQ76942-Q1 (separate part). Lead-free reflow profile per JEDEC J-STD-020.
