ADBMS6948 - 16-Channel Battery Monitor | Analog Devices
MPN: ADBMS6948 ✓ فعالADBMS6948 نمای کلی
A battery pack monitoring system is an integrated circuit that measures the voltage, current, and temperature of individual cells in a battery pack to ensure safe and efficient operation. It is a critical component in battery management systems (BMS), which are used in electric vehicles, energy storage systems, and backup power supplies. The ADBMS6948 belongs to the category of battery monitoring ICs, which are part of the broader power management integrated circuit (PMIC) family. These devices provide essential data for state-of-charge (SoC) and state-of-health (SoH) estimation, cell balancing, and protection against overvoltage, undervoltage, and overcurrent conditions.
Key features of the ADBMS6948 include synchronous pack current and cell voltage measurements, short/over current detection with less than 2 μs response time, programmable detection time and threshold, dedicated outputs for MOSFET/contactor control, redundant measurement, algorithm, and fault pin, 10 general-purpose I/O (GPIO) channels, cell and board temperature measurements, and pack, load, and system diagnostic measurements. The device also includes an SPI interface with a maximum operating frequency of MHz, enabling high-speed communication with a host microcontroller.
The ADBMS6948's parallel measurement architecture is a significant advancement over traditional sequential measurement systems, as it allows simultaneous sampling of all cell voltages and pack current, improving the accuracy of power and energy calculations. This is particularly important in applications where load transients can cause voltage fluctuations, as the synchronous measurement ensures that the voltage and current readings are time-aligned. The device also features a dedicated FAULTB pin that generates an interrupt when any preprogrammed over or under thresholds on cell voltage, cell temperature, or delta measurements are violated, providing immediate fault notification to the system controller.
Typical applications for the ADBMS6948 include mild hybrid electric vehicles, two-wheeler and three-wheeler electric vehicles, four-wheeler electric vehicle auxiliary batteries, backup battery systems, and energy storage systems (ESS). Its high accuracy and robust feature set make it ideal for automotive battery management, where safety and reliability are paramount. The device's ability to measure both cell voltages and pack current synchronously enables precise state-of-charge estimation, which is essential for maximizing battery life and performance.
When designing with the ADBMS6948, it is important to consider the PCB layout to minimize noise and ensure accurate measurements. The device requires careful decoupling of the power supply and proper grounding to achieve the specified TME. Additionally, the SPI interface should be isolated if the battery pack is at a high potential relative to the host controller, using components such as the ADuM1441ARWZ digital isolator. The ADBMS6948 is recommended for new designs, indicating that it is a current product with ongoing support from Analog Devices.
جایگزین‌های drop-in برای ADBMS6948 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
ADBMS6948WCCSZ
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
LTC6811-1
⚡ پکیج یکسان ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADBMS6948WCCSZ-RL
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADBMS6948WCCSZ-RL7
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADBMS6948WCCSZ-RL8
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADBMS6948 مشخصات
| Number of Cells | 16 |
| محدوده اندازه‌گیری | -2.5 V to 5.5 V |
| Total Measurement Error (TME) | <3 mV over full temperature range and lifetime |
| Measurement Architecture | Parallel (simultaneous cell voltage and pack current) |
| Short/Over Current Detection Response | <2 μs |
| GPIO Channels | 10 |
| رابط | SPI |
| بسته‌بندی | 64-LFCSP-SS (9x9 mm) |
| نوع نصب | Surface Mount |
| Cell Balancing | Yes (internal filters and balancing circuit) |
| Fault Output | FAULTB pin (dedicated) |
| MOSFET/Contactor Control | Yes (dedicated outputs) |
| Redundant Measurement | Yes (algorithm and fault pin) |
| Diagnostic Measurements | Pack, load, and system |
| Battery Chemistries | NMC, LFP, and others |
| وضعیت چرخه عمر | Recommended for new designs |
پیکربندی پین ADBMS6948
| پین 1 | C1 — Cell 1 voltage sense input |
| پین 2 | C2 — Cell 2 voltage sense input |
| پین 3 | C3 — Cell 3 voltage sense input |
| پین 4 | C4 — Cell 4 voltage sense input |
| پین 5 | C5 — Cell 5 voltage sense input |
| پین 6 | C6 — Cell 6 voltage sense input |
| پین 7 | C7 — Cell 7 voltage sense input |
| پین 8 | C8 — Cell 8 voltage sense input |
| پین 9 | C9 — Cell 9 voltage sense input |
| پین 10 | C10 — Cell 10 voltage sense input |
| پین 11 | C11 — Cell 11 voltage sense input |
| پین 12 | C12 — Cell 12 voltage sense input |
| پین 13 | C13 — Cell 13 voltage sense input |
| پین 14 | C14 — Cell 14 voltage sense input |
| پین 15 | C15 — Cell 15 voltage sense input |
| پین 16 | C16 — Cell 16 voltage sense input |
| پین 17 | S16 — Stack top sense input |
| پین 18 | GPIO1 — General-purpose I/O 1 |
| پین 19 | GPIO2 — General-purpose I/O 2 |
| پین 20 | GPIO3 — General-purpose I/O 3 |
| پین 21 | GPIO4 — General-purpose I/O 4 |
| پین 22 | GPIO5 — General-purpose I/O 5 |
| پین 23 | GPIO6 — General-purpose I/O 6 |
| پین 24 | GPIO7 — General-purpose I/O 7 |
| پین 25 | GPIO8 — General-purpose I/O 8 |
| پین 26 | GPIO9 — General-purpose I/O 9 |
| پین 27 | GPIO10 — General-purpose I/O 10 |
| پین 28 | FAULTB — Fault output (active low) |
| پین 29 | SPI_CS — SPI chip select |
| پین 30 | SPI_SCLK — SPI clock |
| پین 31 | SPI_SDI — SPI data input |
| پین 32 | SPI_SDO — SPI data output |
| پین 33 | VCC — Power supply |
| پین 34 | GND — Ground |
کاربردهای معمول
ADBMS6948 مناسب است برای 6 کاربردs: Mild Hybrid Electric Vehicles, Two-Wheeler and Three-Wheeler Electric Vehicles, Four-Wheeler Electric Vehicle Auxiliary Battery, Backup Battery Systems, Energy Storage Systems (ESS), Industrial Battery Monitoring.
Mild Hybrid Electric Vehicles
The ADBMS6948 is ideal for mild hybrid electric vehicles (MHEVs) due to its high accuracy (<3 mV TME) and parallel measurement architecture, which enables precise state-of-charge (SoC) estimation under dynamic load conditions. It measures up to 16 series-connected cells, supporting 48V MHEV battery packs. The synchronous cell voltage and pack current measurements ensure accurate power calculations, critical for regenerative braking and engine start-stop functionality. Its robust fault detection (FAULTB pin) and MOSFET/contactor control outputs enhance safety and reliability in automotive environments.
پیشنهادی
Two-Wheeler and Three-Wheeler Electric Vehicles
For two-wheeler and three-wheeler electric vehicles, the ADBMS6948 provides a compact, high-accuracy solution for battery monitoring. Its 16-channel capability supports common battery pack configurations (e.g., 13S or 16S) used in e-scooters and e-rickshaws. The device's low TME (<3 mV) ensures accurate SoC and SoH estimation, extending battery life. The parallel measurement architecture allows simultaneous voltage and current sampling, which is essential for accurate power and energy calculations during acceleration and regenerative braking. The 64-LFCSP package is suitable for space-constrained designs.
پیشنهادی
Four-Wheeler Electric Vehicle Auxiliary Battery
The ADBMS6948 is well-suited for monitoring auxiliary batteries in four-wheeler electric vehicles, such as 12V or 48V systems. Its wide measurement range (-2.5V to 5.5V) accommodates various cell chemistries, including LFP and NMC. The device's high accuracy and redundant measurement features ensure reliable operation in safety-critical applications. The dedicated FAULTB pin provides immediate notification of over/under voltage or temperature violations, enabling rapid system response. The SPI interface allows seamless integration with the vehicle's BMS controller.
پیشنهادی
Backup Battery Systems
In backup battery systems, the ADBMS6948 ensures reliable monitoring of battery health and state-of-charge. Its low TME (<3 mV) allows accurate SoC estimation, which is critical for ensuring backup power availability. The device's ability to measure pack current synchronously with cell voltages enables precise power calculations, helping to optimize battery usage. The programmable over/under current detection with <2 μs response time provides fast protection against faults. The 10 GPIO channels can be used for temperature sensing or other system diagnostics.
پیشنهادی
Energy Storage Systems (ESS)
The ADBMS6948 is designed for energy storage systems (ESS), where high accuracy and reliability are paramount. It measures up to 16 series-connected cells, making it suitable for large battery racks. The parallel measurement architecture ensures accurate SoC and SoH estimation, even under high charge/discharge rates. The device's robust fault detection and redundant measurement features enhance system safety. The SPI interface enables daisy-chaining multiple devices for larger packs, and the 64-LFCSP package is suitable for high-density PCB designs.
پیشنهادی
Industrial Battery Monitoring
The ADBMS6948 can be used in industrial battery monitoring applications, such as forklifts, AGVs, and stationary power systems. Its wide measurement range and high accuracy make it suitable for various battery chemistries. The device's ability to measure pack current synchronously with cell voltages enables precise energy management. The programmable fault thresholds and fast response time (<2 μs) provide reliable protection. The 10 GPIO channels allow for flexible system integration, such as temperature monitoring or relay control.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADBMS6948 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADBMS6948WCCSZ | LTC6811-1 |
|---|---|---|---|
| Package | 64-LFCSP-SS (9x9) | 64-LFCSP-SS (9x9) | 64-LFCSP (9x9) |
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Number of Cells | 16 | 16 | 12 |
| Measurement Range | -2.5V to 5.5V | -2.5V to 5.5V | 0V to 5V |
| TME | <3 mV | <3 mV | 1.2 mV |
| Parallel Measurement | Yes | Yes | No |
| GPIO Channels | 10 | 10 | 5 |
تفاوت‌های کلیدی
- Parallel measurement architecture (در مقابلLTC6811-1)
- Higher cell count support (در مقابلLTC6811-1)
- Faster current detection response (در مقابلLTC6811-1)
یادداشت‌های طراحی
For accurate cell voltage measurements, use Kelvin connections to each cell terminal to minimize trace resistance. Place decoupling capacitors close to the VCC and GND pins, typically 0.1 μF and 10 μF. Ensure a solid ground plane to reduce noise and improve TME performance.
Route the SPI lines (SCLK, SDI, SDO, CS) away from high-current paths to avoid interference. If the battery pack is at a high potential relative to the host controller, use a digital isolator such as the ADuM1441ARWZ on the SPI interface. Keep the FAULTB line short and shielded to prevent false triggers.
The ADBMS6948 in a 64-LFCSP package has a thermal resistance of approximately 25°C/W (typical). For high ambient temperature applications, ensure adequate PCB copper area for heat dissipation. Monitor the junction temperature to stay within the absolute maximum ratings.
اطلاعات انطباق
Compliance data not explicitly provided in verified web data. RoHS and REACH assumed compliant based on Analog Devices standard practices. AEC-Q100 status not confirmed.
