ADBMS6948WCCSZ Part Information

Overview

The ADBMS6948WCCSZ is a highly integrated 16-channel battery pack monitoring system designed for applications requiring precise cell voltage and pack current measurements. It features parallel and redundant measurement architecture, ensuring high accuracy and reliability over the full temperature range and lifetime.

Features

• Cell Voltage Measurement: Up to 16-cell channels with <2mV total measurement error (TME) at 4.2V over the lifetime.
• Parallel and Redundant Architecture: Ensures the lowest external component cost.
• Passive Cell Balancing: Up to 300mA per cell.
• Pack Current Measurement: Independent bidirectional channels with redundancy.
• Dedicated Charge Measurement/Coulomb Counter: Dynamic range ±131mV, resolution 1μV/bit, offset 1μV over the lifetime, gain error 0.1% over the lifetime.
• Synchronous Pack Current and Cell Voltage Measurements: Ensures accurate state of charge (SOC), state of power (SOP), and state of health (SOH) estimation.
• Short/Overcurrent Detection: <2μs response time, programmable detection time and threshold.
• Redundant Measurement, Algorithm, and Fault Pin: Enhances reliability.
• 10 General-purpose I/O (GPIO) Channels: For cell and board temperature measurements, pack, load, and system diagnostic measurements.
• Low Power Monitoring (LPM): For key-off state, with configurable overshoot, undershoot, and time gradient thresholds.
• 4-Wire SPI Communication Interface: 4MHz maximum operating frequency.
• Package: 64-pin QFN-SS.
• AEC-Q100 Qualified: Ensures automotive-grade reliability.

Applications

• Mild hybrid electric vehicles
• Two-wheeler and three-wheeler electric vehicles
• Four-wheeler electric vehicle auxiliary battery
• Backup battery systems
• Energy storage systems (ESS)

Pin Configuration

The ADBMS6948WCCSZ features a 64-pin QFN-SS package. For detailed pin descriptions, refer to the datasheet.

Electrical Characteristics

• Cell Voltage Measurement Range: -2.0V to 5.5V
• Pack Current Measurement: ±131mV dynamic range, 1μV/bit resolution, 1μV offset over the lifetime, 0.1% gain error over the lifetime.
• Overcurrent Detection: <2μs response time.
• Temperature Measurement: Through external NTC thermistors.
• GPIO Channels: For additional voltage and temperature measurements.
• Communication Interface: 4-Wire SPI, up to 4MHz.

Performance

• Parallel Measurement Architecture: Measures all 16 cells simultaneously and redundantly.
• ADCs: Two individual ADCs (C-ADC and S-ADC) with a sampling rate of 4.096MHz and conversion time up to 1ms.
• Digital IIR Filters: Programmable for higher noise reduction.
• Redundant Measurement: Ensures high reliability and accuracy.
• Low Power Monitoring: Prevents thermal runaway conditions even in sleep mode.

Package and Handling

• Package Type: 64-pin QFN-SS
• Operating Temperature: -40°C to +125°C (AEC-Q100 qualified)
• Storage Temperature: -65°C to +150°