MP2797

7-Cell to 16-Cell High-Accuracy Battery Monitor and Protector with Coulomb Counting

Description

The MP2797 is a robust battery management device, providing a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-cell series battery management systems (BMS). This device supports I²C or SPI communication. It supports connections for 7-cell to 16-cell series battery packs, with an absolute voltage exceeding 80V on particular pins.

The MP2797 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltages (up to 16 channels), die temperature, and 4-channel temperature via an external NTC thermistor. The second ADC measures the charge/discharge current via an external current-sense resistor.

The device 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 high/low-temperature protection. All of the protections have configurable thresholds.

The MP2797 features an internal autonomous state machine that leverages the ADC to ensure monitoring of the cell safe operating area, according to the configured thresholds. It also integrates the balancing FETs to equalize the mismatched cells with the option to drive the external balancing FETs.

It 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 may be required depending on the pack voltage.

The MP2797 is available in a TQFP-48 (7mmx7mm) package.

Features & Benefits

Supports 7 to 16 Stacked Cells
I²C or SPI Interface, Support 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 Programmable 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 Paralleled N-Channel MOSFETs
- DSG Soft Start without a Pre-Biasing 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 MTP for Protection Thresholds
Random Cell Connection Tolerant
Available in a TQFP-48 (7mmx7mm) Package

Active Part Numbers:

MP2797DFP-xxxx-T MP2797DFP-0000-T

Meaning of P & Z

Evaluation Tools

EV2797-0000-FP-00A Evaluation Kit 7-Cell to 16-Cell, High-Accuracy I²C Battery Monitoring and Protection System Evaluation Board

The EV2797-0000-FP-00A evaluation board is designed to demonstrate the capabilities of the MP2797DFP-0000, a robust battery management device. The MP2797 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 MP2797DFP-0000 supports I²C communication.

The MP2797 supports connections for 7-cell to 16-cell series battery packs, with an absolute voltage exceeding 80V on particular pins. The MP2797 integrates two separate analog-to-digital converters (ADCs). The first ADC measures each channel’s differential cell voltage (up to 16 channels), die temperature, and 4-channel battery temperature via an external negative temperature coefficient (NTC) thermistor. The second ADC measures the charge/discharge current via an external sense resistor.

The MP2797 has high-side (HS) 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 EV2797-0000-FP-00A has external balancing FETs to equalize mismatched cells. The MP2797 also has integrated balancing FETs for internal cell balancing.

The MP2797 has an optimized baseline current consumption that depends on the operating mode. It is available in a TQFP-48 package.

EV2797-0002-FP-00A

7-Cell to 16-Cell, High-Accuracy SPI Monitoring and Protector with Coulomb Counting Evaluation Board

Buy direct from MPS