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Monolithic Power Systems Inc. MP2791DFP-0001-T
- Part No.:
- MP2791DFP-0001-T
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Management
- Package:
- 48-TQFP
- Datasheet:
-
MP2791DFP-0001-T.pdf
- Description:
- 7-CELL TO 14-CELL, HIGH-ACCURACY
- Quantity:
- Payment:
- Shipping:
Inventory:1,250
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Product details
Overview
MP2791DFP-0001-T from Monolithic Power Systems is a 7- to 14-cell battery monitor and protector IC with dual ADC architecture, ±2% SOC error (when paired with MPF4279x fuel gauge), <5mV cell voltage measurement error, and integrated high-side N-channel MOSFET drivers for charge/discharge control. It supports I²C with 8-bit CRC, operates up to 65.8V VTOP, and delivers passive balancing up to 58mA per cell - deployed in e-bikes, energy storage systems, and power tools.
For engineers reviewing the MP2791DFP-0001-T datasheet, MP2791DFP-0001-T pinout, MP2791DFP-0001-T application, or MP2791DFP-0001-T equivalent, key selection criteria include its 7S–14S series support, synchronous voltage/current sampling for impedance sensing, configurable hardware protections (OVP/UVP/SCP/OCP), TQFP-48 package, and compatibility with external balancing transistors.
Technical Context
The MP2791DFP-0001-T integrates two independent sigma-delta ADCs: one measures up to 14 differential cell voltages, die temperature, and four NTC thermistor channels; the other measures bidirectional pack current via an external sense resistor. This enables strictly synchronized voltage and current sampling for real-time cell and pack impedance monitoring.
Its protection logic executes fully in hardware with user-configurable thresholds for cell/pack over- and under-voltage, charge/discharge over-current, short-circuit, and temperature faults. The device includes dedicated high-side gate drivers for CHG and DSG MOSFETs, each supporting soft-start discharge control and internal OCP/SCP detection without requiring external pre-charge circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Support | 7S to 14S series battery packs; absolute VTOP rating up to +75V enables use in high-voltage ESS and LEV applications. |
| Cell Voltage Accuracy | <±5mV error (2V–4.5V range, 25°C); ensures precise state-of-health estimation and tight voltage-based protection triggering. |
| Current Sensing Error | <±0.5% full-scale error; enables accurate Coulomb counting and high-fidelity charge/discharge energy tracking. |
| ADC Synchronization | Strictly synchronized voltage and current sampling; required for valid AC impedance (EIS) measurements and dynamic cell balancing decisions. |
| Passive Balancing | Internal MOSFETs support 58mA per cell; allows autonomous cell equalization without external FETs in low-power balancing scenarios. |
| Communication Interface | I²C with 8-bit CRC enabled (per -0001 configuration); provides robust, noise-immune host communication for BMS firmware updates and telemetry. |
| Operating Voltage Range | VTOP = 18V to 65.8V; covers nominal 25.2V–52.8V battery stacks (7S–14S Li-ion) with margin for transient overvoltage. |
| Package | TQFP-48 (7mm × 7mm); surface-mount footprint compatible with automated PCB assembly and thermal management via exposed pad. |
Pinout & Package
The MP2791DFP-0001-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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C0–C14 | Cell voltage sense inputs | Differential inputs for 14-series stack; C14 pins (46–48) tied together to sense top cell positive; C0 connects to bottom cell negative. |
| CHG / DSG / SBYDSG | High-side N-MOS gate drivers | Drive external charge/discharge MOSFETs; DSG includes configurable soft-start to eliminate need for pre-charge circuitry. |
| SRP / SRN | Current-sense differential inputs | Accept ±100mV differential across external shunt; enable bidirectional current measurement with 16-bit resolution. |
| NTC1–NTC4 / NTCB | Thermistor interface | Four dedicated NTC inputs with bias (NTCB); support simultaneous temperature monitoring of cells, pack, and environment. |
| VTP / PACKP / GPIOHV1 | High-voltage I/O | Withstand up to +75V relative to AGND; used for pack voltage sensing, load-side monitoring, and HV status signaling. |
| SCL/SCK / SDA/SDI / SDO / GPIO3/nCS | Configurable digital interface | Support I²C (default for -0001-T) or SPI; multi-function pins reduce external logic and simplify host connectivity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronized ADCs | Enables concurrent cell voltage and current sampling for impedance-based SoH analysis and real-time balancing decisions. |
| Hardware-configurable protections | All OVP/UVP/OCP/SCP/temperature thresholds set via registers - no firmware dependency for critical safety shutdowns. |
| Integrated 3.3V/5V LDOs | 3.3V LDO powers external peripherals; REGCTRL-regulated 5.6V output drives external BJT LDO for higher-current auxiliary rails. |
| Open-wire detection | Active pull-up/pull-down on cell sense lines detects broken connections before cell imbalance causes system failure. |
| Persistent dead-battery flag | Non-volatile flag remains set after deep discharge recovery, enabling host firmware to enforce safe reactivation protocols. |
| Lockable MTP memory | User-defined protection thresholds stored in one-time-programmable memory prevent accidental or malicious configuration changes in fielded units. |
Applications
| Battery Backup Systems (UPS) | E-Bikes & E-Scooters |
|---|---|
Use Scenario: Standby power delivery during grid outage with automatic switchover and runtime prediction. IC Role / Device Role / Timing Role: Primary analog front-end for voltage/current/temperature monitoring, cell balancing, and MOSFET-based charge/discharge control. Use Value: Dual ADC synchronization enables accurate impedance-based SoH tracking, extending usable battery life by detecting early capacity fade before runtime degradation occurs. | Use Scenario: Regenerative braking integration, motor startup surge management, and ride-mode adaptive protection. IC Role / Device Role / Timing Role: Real-time pack-level current monitoring and cell-level voltage supervision with hardware-triggered discharge cutoff during overcurrent events. Use Value: Configurable soft-start on DSG driver eliminates pre-charge circuitry, reducing BOM cost and PCB area while maintaining safe turn-on under high-capacitance loads. |
| Energy Storage Systems (ESS) | Power & Gardening Tools |
Use Scenario: Multi-module residential/commercial battery banks requiring cell-level balancing and interlock-safe isolation. IC Role / Device Role / Timing Role: High-voltage pack sensing (VTOP up to 65.8V), 14-cell monitoring, and external balancing transistor drive for active equalization. Use Value: 75V absolute max rating on VTOP and GPIOHV1 pins enables direct connection to high-voltage stacks without level-shifting, simplifying isolation design. | Use Scenario: Cordless drill/driver operation with rapid charge cycles, high pulse currents, and thermal stress during sustained torque. IC Role / Device Role / Timing Role: Simultaneous cell voltage, die temperature, and NTC thermistor readings feed fast-response thermal derating and overcurrent shutdown. Use Value: Hardware OCP/SCP detection with 120µs minimum deglitch time prevents nuisance tripping during motor startup surges while ensuring sub-millisecond fault response. |
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 |
|---|---|---|---|
| BQ7695200RSMR | 16-cell support, integrated LDOs, but no internal balancing MOSFETs; requires external FETs for all balancing. | Lacks native 58mA passive balancing; better suited for designs prioritizing ultra-low quiescent current over autonomous balancing. | Select if system uses external active balancing and requires lower IQ (<1µA shutdown) than MP2791's 2.5µA. |
| ISL94203RTZ-T7A | 14-cell support, SPI-only interface, no I²C option; includes integrated charge pump but no soft-start DSG driver. | No hardware-configurable soft-start discharge - requires external pre-charge circuit for high-capacitance loads. | Select when SPI-native host architecture exists and pre-charge circuitry is already present in design. |
Compared with BQ7695200RSMR and ISL94203RTZ-T7A, the MP2791DFP-0001-T uniquely combines I²C+SPI flexibility, internal 58mA balancing, and hardware soft-start discharge - reducing external component count and enabling faster time-to-market for mid-power LEVs and ESS modules.
Availability
MP2791DFP-0001-T is available at Aetrix Electronics and suitable for battery backups and UPSs, e-bikes and e-scooters, and energy storage systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.
Supply support for MP2791DFP-0001-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, and global distribution through authorized partners.
The MP2791 belongs to MPS's high-accuracy battery monitor and protector product line, engineered specifically for scalable, safety-certifiable BMS architectures in light electric vehicles, energy storage, and industrial backup systems.
FAQ
What communication protocol does MP2791DFP-0001-T support?
The MP2791DFP-0001-T is configured for I²C interface with 8-bit CRC enabled, as indicated by the "0001" suffix. It also supports SPI via pin configuration (SCL/SCK, SDA/SDI, SDO), but the -0001 variant defaults to I²C mode at power-up without requiring register writes.
Does MP2791DFP-0001-T require external components for cell balancing?
No - it integrates on-die balancing MOSFETs rated for 58mA per cell. External balancing transistors can be added for higher current, but are optional. The internal FETs eliminate the need for discrete balancing circuits in applications where 58mA suffices for drift correction.
How does the soft-start discharge feature work?
The DSG driver implements programmable soft-start by ramping gate voltage gradually during turn-on, limiting inrush current into capacitive loads. This avoids voltage droop and eliminates the need for external pre-charge resistors or relays - verified per MPS application note AN-154.
What is the maximum supported pack voltage?
The VTOP pin supports up to +75V absolute maximum, with recommended operating range of 18V to 65.8V. This accommodates 14S Li-ion packs (nominal 52.8V, max 61.6V) with headroom for transient overvoltage events per IEC 62133 and UL 1642.
Can MP2791DFP-0001-T operate without an external microcontroller?
It cannot run autonomous BMS functions without a host MCU, as protection thresholds, balancing control, and fault reporting require register access. However, all hardware protections (OVP/UVP/OCP/SCP) execute independently once configured - ensuring fail-safe behavior even if host firmware hangs.
Is the TQFP-48 package lead-free and RoHS-compliant?
Yes - MP2791DFP-0001-T is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official quality assurance portal, with material declarations available upon request.
What is the purpose of the SBYDSG pin?
SBYDSG is a dedicated P-channel MOSFET driver that bypasses the main DSG FET during low-power standby, enabling ultra-low quiescent current operation while retaining discharge path integrity - critical for long-term storage mode in UPS and portable tools.
MP2791DFP-0001-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tray
- 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-0001-T FAQ
1.How can I place an order for MP2791DFP-0001-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2791DFP-0001-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-0001-T reliable?
The price and inventory of MP2791DFP-0001-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-0001-T is usually 5 days.
3.What payment methods are accepted for MP2791DFP-0001-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2791DFP-0001-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2791DFP-0001-T?
MP2791DFP-0001-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2791DFP-0001-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-0001-T?
For technical support, including MP2791DFP-0001-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2791DFP-0001-T requirements.
6.How does Aetrix verify that MP2791DFP-0001-T is sourced from the original manufacturer or authorized distributors?
All MP2791DFP-0001-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-0001-T meets industry standards.
7.What is the process for return or replacement of MP2791DFP-0001-T?
All MP2791DFP-0001-T units undergo pre-shipment inspection (PSI). If there is an issue with MP2791DFP-0001-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-0001-T part is unused and in its original packaging.
Return procedure for MP2791DFP-0001-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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