MP2791

MP2791

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

Datasheet

Description

The MP2791 is a robust battery management device that provides a complete analog front-end (AFE) monitoring and protection solution. It is designed for multiple-cell series battery management systems (BMS). The device can support I²C or SPI communication. It supports connections for 7-cell to 14-cell series battery packs, with an absolute voltage exceeding 75V on particular pins.

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 temperatures via external negative temperature coefficient (NTC) thermistors. The second ADC measures the charge/discharge current via an external current-sense resistor. The dual ADC architecture enables synchronous voltage and current measurements for cell and pack impedance monitoring.

When paired with an MPF4279x fuel gauge, the MP2791 can achieve a state-of-charge (SOC) error to within 2%.

The MP2791 includes high-side MOSFET (HS-FET) drivers for charge and discharge control. The discharge (DSG) MOSFET driver includes a configurable soft start (SS) that provides a controlled turn-on, eliminating the need for an external pre-charge circuit. The MOSFET drivers also incorporate over-current protection (OCP), short-circuit protection (SCP), battery under-voltage protection (UVP), battery over-voltage protection (OVP), and high-temperature/low-temperature protection. All of these protections have configurable thresholds.

Internal passive balancing MOSFETs can be used to equalize mismatched cells, supporting up to 58mA. There is also the option to drive external balancing transistors (MOSFET or BJT).

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

Features & Benefits

Incorporates Dual Analog-to-Digital Converter (ADC) Architecture:
- <±2% State-of-Charge (SOC) Error with MPF4279x Fuel Gauge
- Cell Voltage Measurement Error <5mV
- Current/Coulomb Counter Error <±0.5%
- Strictly Synchronized Current and Voltage Measurements for Impedance Sensing
Includes N-Channel High-Side MOSFET (HS-FET) Drivers for Charge and Discharge Control:
- Supports MOSFET Soft-Start (SS) Discharge Control to Eliminate Pre-Charge Circuit
- Drives Up to 100A DC with Parallel N-Channel MOSFETs
Hardware Configurable Protections:
- Charge/Discharge Over-Current Protection (OCP) and Short-Circuit Protection (SCP)
- Cell Under-Voltage Protection (UVP) and Over-Voltage Protection (OVP)
- Pack UVP and OVP
- Cell Low-Temperature/High-Temperature Protection
- Die High-Temperature Protection
Passive Cell-Balancing Up to 58mA per Cell:
- Can Drive External Balancing Transistors
- Automatic or Manual Control
Additional Features:
- Integrated 3.3V and 5V Low-Dropout (LDO) Regulators
- Reduced Current Standby Mode
- Load and Charger Plug-In Detection
- High-Voltage and Low-Voltage GPIOs
- Dedicated Thermistor Inputs
- Open-Wire Detection
- Persistent Dead Battery Flag
- Lockable Memory for Thresholds
I²C or SPI Interface with 8-Bit Cyclical Redundancy Check (CRC)
Random Cell Connection Tolerant
Available in a TQFP-48 (7mmx7mm) Package

Active Part Numbers:

MP2791DFP-xxxx-T MP2791DFP-0000-T MP2791DFP-0001-T MP2791DFP-0002-T

Meaning of P & Z

Related Products

MP2791 GUI The MP2791 is highly customizable. Users can configure the MP2791 via the downloadable GUI.

This PC-based GUI allows the user to configure and evaluate the MP2791 via the I²C or serial peripheral interface (SPI) communication interface, depending on the specific MP2791 that has been selected. A configuration panel is provided to set the protection thresholds, enable all relevant functions, and set the corresponding faults. A monitor and control panel is provided to monitor the cell and pack measurements, including the voltage, current, and temperature.

System Requirements: