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Monolithic Power Systems Inc. MPF42795DRT-0B-0000-Z
- Part No.:
- MPF42795DRT-0B-0000-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Management
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MPF42795DRT-0B-0000-Z.pdf
- Description:
- 2 TO 10 STACKED CELLS BATTERY PA
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPF42795DRT-0B-0000-Z from Monolithic Power Systems is a 2–10 series-cell lithium-ion battery fuel gauge IC that estimates pack and individual cell state-of-charge (SOC) and state-of-health (SOH), remaining runtime, charge time, and instantaneous available power. It integrates 5-level LED drivers for direct SOC indication, supports 400kHz I²C with CRC, and operates from 2.5V supply. Used in light EV battery packs with MP279x AFEs.
For engineers reviewing the MPF42795DRT-0B-0000-Z datasheet, MPF42795DRT-0B-0000-Z pinout, MPF42795DRT-0B-0000-Z application, or MPF42795DRT-0B-0000-Z equivalent, key selection concerns include ±3% SOC accuracy when paired with MP279x monitors, 135µA average operating current during rest, TQFN-32 (4mm×4mm) package compatibility, LED driver drive capability (4mA per channel), and adaptive learning support for SOH tracking across cell degradation cycles.
Technical Context
The MPF42795DRT-0B-0000-Z implements a model-based fuel gauge algorithm that consumes externally supplied cell voltages (VRDG_CELL1–10), pack current, and temperature to compute per-cell and pack SOC/SOH. It requires host MCU coordination for data synchronization and EXE_CMD triggering, with IRQ signaling completion or configurable events.
Its I²C interface operates as a slave at default address 0x08, supporting standard (100kHz) and fast mode (400kHz) with optional 32-bit CRC over register address, length, and payload. The device features three operational modes-Active (fuel gauge update + I²C), Standby (idle, SDA-triggered wake), and Disabled (CE-low, 6µA quiescent)-with non-volatile configuration storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SOC Accuracy | ±3% with MP279x AFE, 10°C–50°C, ≤1C charge/discharge - enables reliable runtime estimation in e-bikes and UPS systems |
| Cell Support | 2–10 series Li-ion cells - matches common battery string configurations in scooters, cordless tools, and industrial robots |
| I²C Speed | Up to 400kHz with CRC - ensures robust, high-throughput communication with host MCUs in noisy BMS environments |
| LED Drivers | 5-channel, 4mA sink per LED - directly drives standard 330Ω-series LEDs for low-cost, real-time pack SOC visualization |
| Supply Range | VDD: 2.5V–3.6V - compatible with 3.3V system rails and supports brown-out resilience down to 2.5V |
| Quiescent Current | 6µA in Disabled mode - minimizes standby drain in always-on battery packs requiring long shelf life |
| Operating Temp | −40°C to +85°C junction - validated for use in outdoor energy storage and floor cleaning equipment |
Pinout & Package
The MPF42795DRT-0B-0000-Z is housed in a thermally enhanced TQFN-32 (4mm × 4mm) package with exposed thermal pad (Pin 33) requiring solder connection to PCB ground plane for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PB) | Push-button input | Triggers immediate LED-based SOC display without host MCU intervention - enables user-accessible battery status check |
| 2–6 (LED1–LED5) | LED sink outputs | Each drives one external LED with 4mA capability; mapping follows fixed SOC thresholds (e.g., LED1–5 on = >90% SOC) |
| 10 (VDD) | Main power input | 2.5–3.6V supply; bypassed with 2.2µF ceramic capacitor - powers internal logic and fuel gauge engine |
| 12 (nRST) | Active-low reset | Asynchronous hardware reset with 700ns minimum pulse width - ensures deterministic initialization after power-up or fault recovery |
| 15 (CE) | Chip enable | Low disables I²C and halts fuel gauge updates while retaining memory state - critical for ultra-low-power sleep modes |
| 23 (SCL), 24 (SDA) | I²C interface | Open-drain, 400kHz-capable bus lines with internal pull-downs; require external 10kΩ pull-ups to VCC - simplifies host interface design |
| 25 (IRQ) | Interrupt output | Active-low open-drain signal indicating fuel gauge execution completion or configurable alerts - reduces polling overhead on host MCU |
| 30–32 (VCC, GND, GND) | 3.3V logic supply | VCC accepts 3.0–3.6V; dual GND pins plus exposed pad ensure stable reference and low-noise ADC operation |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive SOH Learning | Updates individual cell health metrics over time using voltage relaxation and impedance trends - extends usable life tracking without manual recalibration |
| Lifetime Parameter Logging | On-chip non-volatile memory stores historical SOC, SOH, cycle count, and temperature exposure - supports predictive maintenance and warranty analytics |
| Configurable LED Control | Supports both automatic (SOC-mapped) and manual (host-controlled) LED modes via LEDS_ON_MAN register - enables flexible UI integration across product variants |
| Robust I²C with CRC | 32-bit CRC applied to register address, length, and data payload - prevents misconfiguration or corrupted parameter writes in electrically noisy applications |
| Turn-key BMS Module Ready | Validated with MBM1xS-P50/P100 reference designs - accelerates development of certified 10S battery packs for light EV and industrial use |
Applications
| Light EV Battery Packs | Energy Storage Systems |
|---|---|
|
Use Scenario: Real-time SOC/SOH monitoring in 48V–72V e-scooter and e-bike battery packs with 8–10 series Li-ion cells. IC Role / Device Role / Timing Role: Fuel gauge core - computes per-cell SOC using voltage/current/temperature inputs from MP279x AFE, triggers IRQ upon update completion. Use Value: Enables accurate range estimation (<±3% error) and end-of-life prediction via adaptive SOH tracking, reducing unexpected shutdowns during rides. |
Use Scenario: Runtime forecasting and health diagnostics in residential UPS and solar-storage hybrid systems with 4–10S LiFePO₄ or NMC stacks. IC Role / Device Role / Timing Role: Pack-level intelligence layer - aggregates cell data from analog front-end, logs degradation history, and reports via I²C to system controller. Use Value: Supports firmware-based capacity derating and maintenance scheduling using lifetime logging, improving system reliability over 5+ years. |
| Industrial Mobile Robots | Cordless Power Tools |
|
Use Scenario: Dynamic load-aware fuel gauging in autonomous floor cleaners and AGVs with 6–10S battery strings subjected to burst discharge profiles. IC Role / Device Role / Timing Role: High-fidelity runtime estimator - calculates instantaneous available power and remaining runtime under variable current (up to 2.8C peak). Use Value: Prevents mid-task shutdown by delivering <2.93% RMS SOC error during dynamic discharge, enabling precise mission planning. |
Use Scenario: User-facing battery level indication and charge-cycle optimization in 20V–60V cordless drills, mowers, and trimmers. IC Role / Device Role / Timing Role: LED interface controller - drives five discrete LEDs via PB-triggered or charge-state-activated mapping per Table 1. Use Value: Eliminates need for external LED driver IC or MCU GPIO expansion, reducing BOM cost and board space in compact tool handles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-cell lithium battery fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ34Z100-G1 (TI) | Standalone impedance-track fuel gauge; supports up to 16 cells; no integrated LED drivers; requires external coulomb counter | Used in higher-cell-count industrial UPS where LED indication is handled separately; lacks push-button SOC trigger | Select when cell count exceeds 10 or when advanced impedance spectroscopy is required beyond voltage-based modeling |
| MAX17055 (Analog Devices) | ModelGauge m5 algorithm; supports up to 14 cells; 1.8V–4.8V supply; includes internal temperature sensor; no LED drivers | Preferred in space-constrained portable medical devices where integrated temp sensing eliminates external NTC | Choose when single-supply flexibility (1.8V min) or embedded temperature measurement is prioritized over LED integration |
Compared with BQ34Z100-G1 and MAX17055, the MPF42795DRT-0B-0000-Z uniquely combines 5-channel LED drivers, PB-triggered SOC display, and optimized 2–10S operation - reducing external components and simplifying UI implementation in cost-sensitive light EV and power tool designs.
Availability
MPF42795DRT-0B-0000-Z is available at Aetrix Electronics and suitable for light EV battery management, energy storage runtime forecasting, and industrial mobile robot power monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MPF42795DRT-0B-0000-Z 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, including DC/DC converters, battery monitors, and fuel gauges for consumer, industrial, and automotive markets.
The MPF42795 belongs to MPS's battery fuel gauge product line, engineered specifically to deliver accurate, low-power, drop-in state estimation for 2–10 series lithium battery packs in cost-sensitive, high-volume mobility applications.
FAQ
What battery chemistries does the MPF42795DRT-0B-0000-Z support?
The MPF42795DRT-0B-0000-Z supports common lithium-ion and lithium-polymer chemistries including NMC, LCO, and LiFePO₄. Its adaptive learning engine refines initial charge/discharge settings and tracks individual cell SOH degradation across these chemistries without requiring manual model reconfiguration.
How does the MPF42795 achieve ±3% SOC accuracy?
This accuracy is achieved only when paired with an MP279x-series battery monitor (e.g., MP2791) under defined conditions: 10°C–50°C ambient, ≤1C charge/discharge rates, and proper host MCU synchronization of VRDG_CELLxx, IRDG_CELLxx, and TRDG_TSx registers prior to EXE_CMD execution.
Can the LED indicators be controlled manually instead of automatically?
Yes. Setting the LEDS_ON_MAN register enables manual control mode, allowing the host MCU to independently turn each LED (LED1–LED5) on/off via dedicated LEDx_ON registers - useful for custom status coding or diagnostic modes outside standard SOC mapping.
What is the role of the CE pin in power management?
The CE (chip enable) pin, when driven low, disables I²C communication and halts all fuel gauge computation while preserving internal state variables in memory. This reduces current consumption to 6µA, making it ideal for deep-sleep states in battery-powered systems requiring rapid wake-and-resume capability.
Is the MPF42795DRT-0B-0000-Z compatible with non-MPS battery monitors?
Yes. While ±3% SOC accuracy is validated with MP279x AFEs, the MPF42795 accepts generic cell voltage, current, and temperature inputs via its VRDG_CELLxx, IRDG_CELLxx, and TRDG_TSx registers - enabling integration with third-party analog front-ends through proper host MCU data formatting and timing alignment.
Does the device support lifetime logging without external memory?
Yes. The MPF42795DRT-0B-0000-Z includes on-chip non-volatile memory that stores key lifetime parameters including cycle count, cumulative charge/discharge, temperature exposure history, and SOH evolution - accessible via I²C for field analytics without adding external EEPROM.
What is the function of the IRQ pin beyond fuel gauge completion signaling?
The IRQ pin is configurable to assert on multiple events including fuel gauge execution completion, SOC crossing user-defined thresholds, SOH degradation alerts, or LED state changes - reducing host polling and enabling event-driven power management in resource-constrained MCUs.
MPF42795DRT-0B-0000-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Fuel Gauge
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2 ~ 10
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (4x4)
MPF42795DRT-0B-0000-Z FAQ
1.How can I place an order for MPF42795DRT-0B-0000-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPF42795DRT-0B-0000-Z 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 MPF42795DRT-0B-0000-Z reliable?
The price and inventory of MPF42795DRT-0B-0000-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPF42795DRT-0B-0000-Z is usually 5 days.
3.What payment methods are accepted for MPF42795DRT-0B-0000-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPF42795DRT-0B-0000-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPF42795DRT-0B-0000-Z?
MPF42795DRT-0B-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPF42795DRT-0B-0000-Z 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 MPF42795DRT-0B-0000-Z?
For technical support, including MPF42795DRT-0B-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPF42795DRT-0B-0000-Z requirements.
6.How does Aetrix verify that MPF42795DRT-0B-0000-Z is sourced from the original manufacturer or authorized distributors?
All MPF42795DRT-0B-0000-Z 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 MPF42795DRT-0B-0000-Z meets industry standards.
7.What is the process for return or replacement of MPF42795DRT-0B-0000-Z?
All MPF42795DRT-0B-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPF42795DRT-0B-0000-Z, 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 MPF42795DRT-0B-0000-Z part is unused and in its original packaging.
Return procedure for MPF42795DRT-0B-0000-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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