Monolithic Power Systems Inc. MP2787DFP-0002-T

Overview

MP2787DFP-0002-T from Monolithic Power Systems is a 7- to 16-cell battery monitor IC with dual ADC architecture, coulomb counting, and SPI interface (CRC disabled). It performs synchronous cell voltage (±5 mV error), current (±0.5% error), and temperature measurements for high-accuracy state-of-charge estimation when paired with MPF4279x fuel gauges. It supports up to 75.2 V pack voltage and integrates passive balancing MOSFETs (58 mA per cell) for E-bike and energy storage systems.

For engineers reviewing the MP2787DFP-0002-T datasheet, MP2787DFP-0002-T pinout, MP2787DFP-0002-T application in BMS designs, or MP2787DFP-0002-T equivalent for multi-cell monitoring, this page delivers verified electrical specs, real-world alarm thresholds, balancing capability, thermal sensing architecture, and SPI-based communication timing constraints - all confirmed against MPS Rev. 1.0 documentation.

Technical Context

The MP2787 employs two independent sigma-delta ADCs: one dedicated to 16-channel differential cell voltage, die temperature, and four NTC thermistor inputs; the other exclusively measures charge/discharge current via external sense resistor with 16-bit resolution and 2 ms conversion time. This strict synchronization enables impedance-based cell health analysis and accurate coulomb integration.

Hardware alarm logic operates independently of host firmware: configurable over-voltage/under-voltage thresholds per cell (19.5 mV step), pack-level OV/UV, deep discharge detection, and temperature interrupts (cell, die, NTC) with programmable hysteresis. Internal balancing FETs (R_DS(ON) = 15–50 Ω) support automatic/manual control and external transistor drive.

Key Specifications

Pinout & Package

TQFP-48 (7 mm × 7 mm) package with exposed thermal pad; RoHS-compliant, lead-free, halogen-free construction.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-cell battery monitoring applications.

Compared with BQ7695203RSMR and MAX17853GCM+, MP2787DFP-0002-T uniquely combines SPI interface, on-die balancing FETs, dual LDOs, and 4-NTC support in a single TQFP-48 package - reducing system-level component count and PCB area by ≥30% in space-constrained portable BMS designs.

Availability

MP2787DFP-0002-T is available at Aetrix Electronics and suitable for power tools, e-scooters, and uninterruptible power supplies requiring stable component supply, long-lifecycle assurance, and production-ready SPI-based BMS firmware integration.

Supply support for MP2787DFP-0002-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with design centers in the US, China, and Taiwan.

The MP2787 belongs to MPS's Battery Monitoring & Protection product line, engineered specifically for high-accuracy, multi-cell Li-ion/LiFePO₄ BMS in consumer, industrial, and transportation applications - emphasizing low-power operation, hardware safety autonomy, and seamless fuel gauge co-processing.

FAQ

What communication protocols does MP2787DFP-0002-T support?

MP2787DFP-0002-T supports SPI only (CRC disabled), as indicated by the "0002" suffix in its part number. It does not support I²C. The SCL/SCK and SDA/SDI pins function exclusively as SPI clock and data lines; SDO is dedicated to SPI output. Configuration is fixed at factory and cannot be reprogrammed in-system.

Can MP2787DFP-0002-T monitor fewer than 7 cells?

No - the device is designed for minimum 7-series (7S) operation. Attempting to configure for fewer cells violates the absolute maximum rating for C0-to-AGND (–0.5 V to +5.7 V) and risks incorrect voltage referencing. It must be used with 7 to 16 series-connected cells, with unused Cx pins tied appropriately per MPS layout guidelines.

How does the dual ADC architecture improve SOC accuracy?

The dual ADCs sample cell voltage and current simultaneously with matched timing paths, eliminating phase skew between voltage and current waveforms. This enables precise impedance calculation (Z = ΔV/ΔI) and real-time correction of coulomb counter drift - achieving ≤2% SOC error when paired with MPF4279x fuel gauges, as validated in CC/CV charge profiles.

What is the maximum balancing current per cell, and how is it controlled?

Internal balancing FETs deliver up to 58 mA per cell at 25°C (R_DS(ON) = 28 Ω typ.). Control is implemented via register writes: automatic mode triggers balancing when cell voltage deviation exceeds threshold; manual mode allows host MCU to enable/disable each FET individually through dedicated command registers.

Does MP2787DFP-0002-T include open-wire detection?

Yes - it implements hardware-based open-wire detection on all C0–C16 pins using 100 µA internal pull-up/pull-down current sources. Detection is autonomous and generates an interrupt (xALERT) without host intervention. The feature is enabled by default and requires no calibration or external components.

What are the voltage limits on GPIOHV1, and what is its primary use case?

GPIOHV1 withstands –0.3 V to +86 V relative to AGND and 0.3 V relative to VTOP. Its primary use is as a high-voltage fault indicator - e.g., directly connected to battery-pack positive to assert xALERT during over-voltage events without level-shifting circuitry, reducing response latency to <10 µs.

Is the 3.3 V LDO output (3V3 pin) monitored internally?

Yes - the 3V3 rail is continuously measured by an internal 15-bit ADC with ±25 mV error over –40°C to +85°C. This reading is accessible via SPI register read and can trigger a hardware interrupt if the output deviates beyond user-configured UV/OV thresholds, enabling robust peripheral power supervision.