My Inquiry
My Account
Monolithic Power Systems Inc. MP2791DFP-0000-T
- Part No.:
- MP2791DFP-0000-T
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
MP2791DFP-0000-T.pdf
- Description:
- 7-CELL TO 14-CELL, HIGH-ACCURACY
- Quantity:
- Payment:
- Shipping:
Inventory:1,240
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP2791DFP-0000-T from Monolithic Power Systems is a 7- to 14-cell battery monitor and protector IC with dual ADC architecture, ±2% SOC error (with MPF4279x fuel gauge), <5mV cell voltage measurement error, and integrated high-side N-channel MOSFET drivers for charge/discharge control. It supports I²C or SPI communication and operates up to 65.8V pack voltage, targeting high-reliability BMS in e-bikes and energy storage systems.
For engineers reviewing the MP2791DFP-0000-T datasheet, MP2791DFP-0000-T pinout, MP2791DFP-0000-T application, or MP2791DFP-0000-T equivalent, this page delivers verified technical context, real-world protection thresholds, synchronous voltage/current measurement capability for impedance sensing, passive balancing up to 58mA per cell, and hardware-configurable over-voltage/under-voltage/over-current protections with ±19.5mV step resolution.
Technical Context
The MP2791 employs two independent sigma-delta ADCs: one measures up to 14 differential cell voltages, die temperature, and four external NTC thermistors; the other measures charge/discharge current via an external sense resistor - enabling strictly synchronized sampling for accurate cell and pack impedance monitoring. Its dual-ADC timing alignment eliminates phase-induced errors in coulomb counting and state-of-health estimation.
It integrates high-side N-channel MOSFET drivers with configurable soft-start discharge control, eliminating external pre-charge circuits. Protection logic runs autonomously in hardware, supporting cell-level UVP/OVP (±19.5mV steps), pack-level UVP/OVP, deep-discharge detection, and temperature-based shutdown - all with user-programmable thresholds and deglitching (e.g., 120µs SC detection latency).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | 7S to 14S series battery packs - enables scalable BMS design for 25.9V–65.8V nominal systems without re-architecting analog front-end. |
| Cell Voltage Accuracy | <±5mV (2V–4.5V range, 25°C) - ensures precise cell balancing decisions and prevents premature cutoff or overcharge in multi-cell stacks. |
| Current Measurement Error | <±0.5% full-scale - maintains high-fidelity coulomb counting for SOC estimation within ±2% when paired with MPF4279x fuel gauge. |
| Max Pack Voltage | 65.8V on VTOP pin - supports high-voltage LEVs and ESS applications while maintaining safe margin below 75V absolute max rating. |
| Passive Balancing Current | Up to 58mA per cell - sufficient for active equalization of typical Li-ion capacity mismatches without external FETs. |
| Protection Step Resolution | 19.5mV per step for cell OVP/UVP - allows fine-grained threshold tuning to match specific cell chemistry voltage profiles. |
| Communication Interface | I²C or SPI with 8-bit CRC - provides robust, noise-immune digital interface suitable for noisy automotive and industrial environments. |
| Operating Temperature | −40°C to +85°C junction - validated for under-hood, outdoor, and industrial battery pack deployments. |
Pinout & Package
MP2791DFP-0000-T is housed in a TQFP-48 (7mm × 7mm) package with exposed thermal pad. Pin functions are validated per MPS MP2791 Rev. 1.0 datasheet (Aug 2023), including dedicated cell voltage inputs (C0–C14), high-voltage GPIOs (GPIOHV1), thermistor bias (NTCB), and dual MOSFET drivers (CHG, DSG, SBYDSG).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C0–C14 | Cell voltage input terminals | C0 connects to cell 1 negative; C1–C14 connect to successive cell positives - supports random cell connection tolerance and 7–14S configuration without remapping. |
| CHG / DSG / SBYDSG | High-side N-MOSFET gate drivers | Drive external charge/discharge FETs; DSG includes configurable soft-start to eliminate need for pre-charge circuitry. |
| SRP / SRN | Current-sense differential inputs | Measure bidirectional pack current via external shunt; support ±100mV input range with <±12µV offset error. |
| NTC1–NTC4 / NTCB | Thermistor interface | Four dedicated NTC inputs with shared bias (NTCB); enable simultaneous monitoring of cell, pack, and ambient temperatures. |
| VTOP / PACKP / VMID | High-voltage sensing nodes | VTOP monitors top-of-stack voltage (up to 65.8V); PACKP senses load-side pack voltage; VMID connects to MOSFET mid-point for accurate driver control. |
| SCL/SCK / SDA/SDI / SDO / GPIO3/nCS | Configurable digital interface | Multi-function pins support I²C (SCL/SDA) or SPI (SCK/SDI/SDO/nCS) - simplifies host controller integration with single footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronized ADC architecture | Enables simultaneous cell voltage and current sampling for real-time impedance calculation - critical for SOH estimation and aging detection. |
| Hardware-based protection engine | Autonomous OVP/UVP/OC/SC/temperature fault response with <120µs short-circuit detection - no firmware dependency for safety-critical shutdown. |
| Integrated 3.3V and 5V LDOs | Reduces external power components; 3.3V LDO supplies host MCU or sensors, with ±5% accuracy across −40°C to +85°C. |
| Passive balancing with external drive option | On-chip 28Ω RDS(ON) balancing FETs (25°C) plus GPIO-controlled external transistor drive - supports flexible balancing strategy per application. |
| Open-wire detection & dead-battery flag | Active pull-up/pull-down on cell inputs detects broken connections; persistent dead-battery flag survives power cycle - improves field serviceability. |
| Load/charger plug-in detection | Monitors voltage transients on PACKP and GPIOs to auto-detect charger or load attachment - enables adaptive BMS state transitions without host polling. |
Applications
| E-Bike Battery Management | Energy Storage System (ESS) Rack Monitoring |
|---|---|
|
Use Scenario: 48V/52V e-bike battery pack with 13S Li-ion configuration, requiring cell-level protection, SOC accuracy, and discharge soft-start. IC Role / Device Role / Timing Role: Primary AFE for voltage/current/temperature acquisition, hardware-triggered OCP/SCP shutdown, and coulomb counting synchronization with fuel gauge. Use Value: Eliminates external pre-charge circuit via DSG soft-start; achieves ±2% SOC error over lifetime using dual-ADC sync and MPF4279x integration. |
Use Scenario: 400V modular ESS rack with 104S LiFePO₄ strings, needing distributed monitoring, passive balancing, and pack-level UVP/OVP. IC Role / Device Role / Timing Role: Standalone monitor per string; performs autonomous cell balancing, open-wire detection, and pack voltage validation at PACKP node. Use Value: 58mA internal balancing current handles typical LiFePO₄ mismatch; 65.8V VTOP rating supports 104S (3.2V×104 = 332.8V) with headroom for transient surges. |
| Power Tool Battery Pack | UPS Backup Battery Module |
|
Use Scenario: 20V–60V cordless power tool battery with fast-charge capability, high-current discharge, and thermal runaway prevention. IC Role / Device Role / Timing Role: Real-time current monitoring with 16-bit ADC, die temperature shutdown at 140°C, and configurable OC thresholds for burst-load handling. Use Value: 100mV current-sense range with ±0.5% gain error ensures accurate peak-current capture during motor startup; hardware OCP responds in <120µs. |
Use Scenario: 48V UPS battery module with dual-path redundancy, requiring fail-safe disconnect, low-quiescent monitoring, and plug-in event detection. IC Role / Device Role / Timing Role: Supervises main and backup battery strings; triggers CHG/DSG disconnect on pack UVP/OVP; flags dead-battery condition persistently. Use Value: 1µA shutdown current extends shelf life; NSHDN pin enables system-level safe-state entry; xALERT output signals faults to UPS controller without polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor and protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ76952 by Texas Instruments | 16-cell support, integrated LDOs, but only single ADC (asynchronous voltage/current sampling); no built-in DSG soft-start. | Lacks synchronous impedance sensing; requires external pre-charge circuit for high-capacity packs. | Select when 16S coverage is required and impedance monitoring is non-critical; verify external pre-charge design overhead. |
| ISL94203 by Renesas | 14-cell support, dual ADC, but no integrated CHG/DSG drivers - requires external gate drivers and discrete protection logic. | Higher BOM count and layout complexity; lacks hardware OCP/SCP autonomy. | Choose if existing designs already use external drivers and require maximum flexibility in protection sequencing. |
Compared with BQ76952 and ISL94203, MP2791DFP-0000-T uniquely combines 14S monitoring, dual synchronized ADCs, integrated high-side drivers with soft-start, and autonomous hardware protection - reducing total component count and improving time-to-market for LEV and ESS BMS designs.
Availability
MP2791DFP-0000-T is available at Aetrix Electronics and suitable for e-bike battery management, energy storage system (ESS) rack monitoring, and power tool battery pack applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for MP2791DFP-0000-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 over two decades of innovation in battery management, DC/DC conversion, and motor control solutions.
The MP2791 belongs to MPS's high-accuracy battery monitor and protector product line, designed specifically for scalable, safety-certifiable BMS in light electric vehicles, energy storage, and industrial portable equipment - emphasizing hardware autonomy, measurement precision, and system-level integration.
FAQ
What communication protocols does MP2791DFP-0000-T support?
MP2791DFP-0000-T supports both I²C and SPI interfaces, selectable via pin configuration (SCL/SCK, SDA/SDI, SDO, GPIO3/nCS). I²C mode uses standard two-wire signaling with optional 8-bit CRC; SPI mode supports full-duplex operation with configurable clock polarity and phase. Both modes operate across the full −40°C to +85°C temperature range.
Does MP2791DFP-0000-T include internal balancing FETs?
Yes, MP2791DFP-0000-T integrates on-die N-channel MOSFETs for passive cell balancing, rated for up to 58mA per cell at 25°C (RDS(ON) = 28Ω typ). It also provides GPIO control signals to drive external balancing transistors (MOSFET or BJT), enabling higher-current or active balancing schemes when needed.
How does the DSG soft-start function eliminate the need for an external pre-charge circuit?
The DSG driver implements programmable soft-start by gradually ramping gate voltage during turn-on, limiting inrush current into large pack capacitance. This controlled slew rate prevents voltage spikes and relay arcing, removing the requirement for discrete pre-charge resistors, relays, and associated control logic in high-voltage battery systems.
What is the maximum supported pack voltage for MP2791DFP-0000-T?
The MP2791DFP-0000-T supports pack voltages up to 65.8V on the VTOP pin under recommended operating conditions. Its absolute maximum rating is +75V, providing design margin for transient overvoltages. This enables reliable operation in 13S–14S Li-ion (48V–60V nominal) and 16S–20S LiFePO₄ configurations.
Can MP2791DFP-0000-T operate without an external microcontroller?
Yes - MP2791DFP-0000-T executes all core protection functions (cell OVP/UVP, pack OVP/UVP, OC, SC, temperature faults) autonomously in hardware. While an MCU is required for configuration, data logging, and advanced features like coulomb counting, safety-critical shutdowns occur independently without firmware intervention.
What is the accuracy of cell voltage measurement over temperature?
Cell voltage measurement error is ±12.5mV over −40°C to +85°C (2V–4.5V range), and ±7.5mV over −20°C to +65°C. At 25°C, error is limited to ±5mV. These values are specified without calibration; post-PCB calibration can further reduce error - application notes are available from MPS Field Applications Engineers.
Is MP2791DFP-0000-T compatible with the MPF4279x fuel gauge family?
Yes - MP2791DFP-0000-T is explicitly designed to pair with MPF4279x fuel gauges. When used together, the dual-ADC synchronization and calibrated current/voltage paths achieve ≤2% state-of-charge (SOC) error across charge/discharge cycles and temperature ranges, as confirmed in MPS application testing.
MP2791DFP-0000-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Multi-Function Controller
- Battery Chemistry:
- -
- Number of Cells:
- 7 ~ 14
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- I2C, SPI
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFP (7x7)
MP2791DFP-0000-T FAQ
1.How can I place an order for MP2791DFP-0000-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2791DFP-0000-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP2791DFP-0000-T reliable?
The price and inventory of MP2791DFP-0000-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2791DFP-0000-T is usually 5 days.
3.What payment methods are accepted for MP2791DFP-0000-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2791DFP-0000-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2791DFP-0000-T?
MP2791DFP-0000-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2791DFP-0000-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP2791DFP-0000-T?
For technical support, including MP2791DFP-0000-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2791DFP-0000-T requirements.
6.How does Aetrix verify that MP2791DFP-0000-T is sourced from the original manufacturer or authorized distributors?
All MP2791DFP-0000-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP2791DFP-0000-T meets industry standards.
7.What is the process for return or replacement of MP2791DFP-0000-T?
All MP2791DFP-0000-T units undergo pre-shipment inspection (PSI). If there is an issue with MP2791DFP-0000-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP2791DFP-0000-T part is unused and in its original packaging.
Return procedure for MP2791DFP-0000-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP2791DFP-0000-T Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
