ADBMS6948 - 16-Channel Battery Monitor | Analog Devices
MPN: ADBMS6948 ✓ AktifADBMS6948 Ringkasan
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.
Alternatif penggantian untuk ADBMS6948 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
ADBMS6948WCCSZ
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LTC6811-1
⚡ Pakai Pakai Sama ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADBMS6948WCCSZ-RL
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADBMS6948WCCSZ-RL7
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADBMS6948WCCSZ-RL8
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
ADBMS6948 Spesifikasi
| Number of Cells | 16 |
| Dampak Pengukuran | -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 |
| Antarmuka | SPI |
| Paket | 64-LFCSP-SS (9x9 mm) |
| Tipe Mounting | 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 |
| Status Lingkungan Hidup | Recommended for new designs |
Konfigurasi Pin ADBMS6948
| Pin produk 1 | C1 — Cell 1 voltage sense input |
| Pin produk 2 | C2 — Cell 2 voltage sense input |
| Pin produk 3 | C3 — Cell 3 voltage sense input |
| Pin produk 4 | C4 — Cell 4 voltage sense input |
| Pin produk 5 | C5 — Cell 5 voltage sense input |
| Pin produk 6 | C6 — Cell 6 voltage sense input |
| Pin produk 7 | C7 — Cell 7 voltage sense input |
| Pin produk 8 | C8 — Cell 8 voltage sense input |
| Pin produk 9 | C9 — Cell 9 voltage sense input |
| Pin produk 10 | C10 — Cell 10 voltage sense input |
| Pin produk 11 | C11 — Cell 11 voltage sense input |
| Pin produk 12 | C12 — Cell 12 voltage sense input |
| Pin produk 13 | C13 — Cell 13 voltage sense input |
| Pin produk 14 | C14 — Cell 14 voltage sense input |
| Pin produk 15 | C15 — Cell 15 voltage sense input |
| Pin produk 16 | C16 — Cell 16 voltage sense input |
| Pin produk 17 | S16 — Stack top sense input |
| Pin produk 18 | GPIO1 — General-purpose I/O 1 |
| Pin produk 19 | GPIO2 — General-purpose I/O 2 |
| Pin produk 20 | GPIO3 — General-purpose I/O 3 |
| Pin produk 21 | GPIO4 — General-purpose I/O 4 |
| Pin produk 22 | GPIO5 — General-purpose I/O 5 |
| Pin produk 23 | GPIO6 — General-purpose I/O 6 |
| Pin produk 24 | GPIO7 — General-purpose I/O 7 |
| Pin produk 25 | GPIO8 — General-purpose I/O 8 |
| Pin produk 26 | GPIO9 — General-purpose I/O 9 |
| Pin produk 27 | GPIO10 — General-purpose I/O 10 |
| Pin produk 28 | FAULTB — Fault output (active low) |
| Pin produk 29 | SPI_CS — SPI chip select |
| Pin produk 30 | SPI_SCLK — SPI clock |
| Pin produk 31 | SPI_SDI — SPI data input |
| Pin produk 32 | SPI_SDO — SPI data output |
| Pin produk 33 | VCC — Power supply |
| Pin produk 34 | GND — Ground |
Aplikasi Umum
ADBMS6948 cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADBMS6948 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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 |
Diferensiator Kunci
- Parallel measurement architecture (vsLTC6811-1)
- Higher cell count support (vsLTC6811-1)
- Faster current detection response (vsLTC6811-1)
Catatan Desain
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.
Informasi Konformitas
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.
