MP2791

MP2791

7-Cell to 14-Cell, High-Accuracy Battery Monitor and Protector with Coulomb Counting

Description

The MP2791 is a robust battery management device, providing a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-series cell battery management systems (BMS). The MP2791 supports connections for 7-cell to 16-cell in series battery packs, with an absolute voltage exceeding 75V on particular pins.

The device supports I²C or SPI communication. The MP2791 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltages (up to 14 channels), die temperature, and 4-channel temperature via an external NTC thermistor. The second ADC measures the charge/discharge current via an external sense resistor.

The MP2791 has high-side drivers and features robust protection functions, such as over-current protection (OCP), short-circuit protection (SCP), battery under-voltage protection (UVP), battery over-voltage protection (OVP), and low/high-temperature protection. All of the protections have configurable thresholds.

Integrated balancing FETs equalize mismatched cells, with the option to drive the external balancing FETs. The MP2791 features an internal autonomous state machine that leverages the ADC to ensure monitoring of the cell safe operating area, according to the configured thresholds.

The MP2791 has an optimized baseline current consumption that depends on the operating mode. For applications requiring compliance with IPC 2221B or UL 60950-1, conformal coating might be required depending on the pack voltage.

The MP2791 is available in a TQFP-48 (7mmx7mm) package.

Features & Benefits

Supports 7 to 14 Stacked Cells
I²C or SPI Interface, Supports 8-Bit Cyclic Redundancy Check (CRC)
Analog Front-End (AFE) Monitor:
- Two Separate ADCs Provide Cell and Pack Voltage Strictly Synchronized with Current
- 15-Bit ADC with ≤5mV Total Cell Measurement Error at 25°C
- 16-Bit ADC with ±0.5% (Pack Current and Coulomb Counting) Measurement Error at 25°C via SRP-SRN
Hardware Configurable Protections:
- Charge/Discharge Over-Current Protection (OCP)
- Charge/Discharge Short-Circuit Protection (SCP)
- Cell Under-Voltage Protection (UVP) and Over-Voltage Protection (OVP)
- Pack Under-Voltage Protection (UVP) and Over-Voltage Protection (OVP)
- Cells Low/High-Temperature Protection
- Die High-Temperature Protection
Integrated High-Side FET (HS-FET) Driver:
- Capable of Driving More than 4 Parallel N-Channel MOSFETs
- DSG Soft Start without a Pre-Biased Circuit
- GPIO or Register Control FET
Automatic or Manual Cell-Balancing
Delicate Functions:
- Reduced Current Standby Mode
- Load/Charger Plug-In Detection
- High-Voltage and Low-Voltage GPIOs
- Open-Wire Detection
- Persistent Dead Battery Flag
- Lockable Multiple-Time Programmable (MTP) Memory for Protection Thresholds
Random Cell Connection Tolerant
Available in a TQFP-48 (7mmx7mm) Package

Active Part Numbers:

MP2787DFP-xxxx-T MP2787DFP-0000-T

Meaning of P & Z

Evaluation Tools

EV2791-0000-FP-00A Evaluation Kit 7-Cell to 14-Cell, High-Accuracy, Battery Monitoring and Protection IC with I²C and Coulomb Counting Evaluation Board

The EV2791-0000-FP-00A is an evaluation board designed to demonstrate the capabilities of the MP2791, a robust battery management device. The MP2791 provides a complete solution that can monitor the analog front-end (AFE) and provide protections. It is designed for battery systems with multiple cells in series. The MP2791DFP-0000 supports I²C communication.

The device supports connections for 7-cell to 14-cell series battery packs, with absolute voltages exceeding 75V on particular pins. The MP2791 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltage (up to 14 channels), die temperature, and 4-channel battery temperature via an external negative temperature coefficient (NTC) thermistor. The second ADC measures the charge and discharge currents via an external sense resistor.

The MP2791 provides high-side MOSFET (HS-FET) drivers and features robust protection functions, such as over-current protection (OCP), short-circuit protection (SCP), battery under-voltage protection (UVP), battery over-voltage protection (OVP), and high/low-temperature protection. All of the protections have configurable thresholds.

The EV2791-0000-FP-00A includes external balancing FETs that equalize mismatched cells. The MP2791 also has integrated balancing FETs for internal cell-balancing.

The MP2791 has an optimized baseline current consumption that depends on the operating mode. It is available in a TQFP-48 (7mmx7mm) package.

Design Resources