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Monolithic Power Systems Inc. MPF42792DRT-0B-0000-Z
- Part No.:
- MPF42792DRT-0B-0000-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Management
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MPF42792DRT-0B-0000-Z.pdf
- Description:
- 2 TO 16 STACKED CELLS BATTERY PA
- Quantity:
- Payment:
- Shipping:
Inventory:4,980
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Product details
Overview
MPF42792DRT-0B-0000-Z from Monolithic Power Systems is a 2–16 series stacked-cell lithium-ion battery fuel gauge IC that estimates per-cell and pack state-of-charge (SOC) and state-of-health (SOH), remaining runtime, charge time, and instantaneous available power. It operates with 2.5V minimum supply voltage, achieves ±3% SOC accuracy when paired with MP279x AFEs, and supports adaptive learning for SOH tracking in light EV and energy storage systems.
For engineers reviewing the MPF42792DRT-0B-0000-Z datasheet, MPF42792DRT-0B-0000-Z pinout, MPF42792DRT-0B-0000-Z application, or MPF42792DRT-0B-0000-Z equivalent, key selection considerations include I²C-based host-MCU coordination, TQFN-32 package thermal performance, low-power disabled mode (6 µA), and compatibility with MP279x analog front-ends for high-accuracy cell monitoring.
Technical Context
The MPF42792DRT-0B-0000-Z functions as a host-coordinated fuel gauge engine-not a standalone AFE-relying on external cell voltage, current, and temperature inputs via I²C register writes (e.g., VRDG_CELL1–VRDG_CELL16, IRDG_CELL1–IRDG_CELL16). Its core algorithm performs real-time SOC/SOH estimation using adaptive learning models updated per cell to track degradation over lifetime.
It implements a slave-mode I²C interface (up to 400 kHz, CRC-enabled), supports configurable slave address (default 0x08), and uses interrupt-driven execution control via IRQ pin. Operating modes include Active (fuel gauge update + I²C), Standby (idle wait), and Disabled (CE-low, 6 µA quiescent, state retention).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| SOC Accuracy | ±3% with MP279x AFE at 10–50°C, 1C charge/discharge - enables reliable range estimation in e-bikes and UPS. |
| Cell Support | 2–16 series Li-ion cells - matches common pack configurations from cordless tools (2S–4S) to forklifts (12S–16S). |
| I²C Interface | Up to 400 kHz with CRC - ensures robust communication in noisy industrial environments with error detection. |
| Supply Voltage | VDD: 2.5–3.6 V; VCC: 3.0–3.3 V - compatible with standard 3.3V MCU rails and LDO-regulated BMS subsystems. |
| Quiescent Current | 6 µA in Disabled mode; 135 µA avg. during rest - extends shelf life and reduces standby drain in always-on battery packs. |
| Package | TQFN-32 (4 mm × 4 mm, 0.5 mm pitch) with exposed GND pad - provides low thermal resistance (θJA = 47°C/W) for sustained operation. |
| Operating Temp | −40°C to +85°C junction - validated for industrial robots, floor cleaners, and outdoor energy storage deployments. |
Pinout & Package
TQFN-32 (4 mm × 4 mm) package with exposed thermal pad (Pin 33, GND) requiring solder connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–8, 13–20, 26–30 | No Connection | Unbonded die pads - must remain floating; no routing or solder mask opening required. |
| 9 | LDO Input | Internal LDO bypass node - requires 2.2 µF + 100 nF ceramic capacitor to GND for stable regulation. |
| 10 | VDD | Main power input (2.5–3.6 V) - bypassed with 2.2 µF ceramic capacitor to GND. |
| 11, 32, 33 | GND | System ground reference - Pins 32/33 are dedicated GND; Pin 33 is exposed thermal pad. |
| 12 | nRST | Active-low reset input - 700 ns minimum pulse width; threshold 0.2×VDD to 0.9×VDD. |
| 15 | CE | Chip enable - low disables I²C and fuel gauge updates, reducing current to 6 µA while retaining memory state. |
| 23 | SCL | I²C clock line - open-drain, pulled up externally (10 kΩ); supports 10–400 kHz operation. |
| 24 | SDA | I²C data line - open-drain, pulled up externally (10 kΩ); supports bidirectional CRC-protected transfers. |
| 25 | IRQ | Interrupt request output - active-low signal indicating completed fuel gauge iteration or configurable event. |
| 31 | VCC | Digital I/O supply (3.0–3.3 V) - bypassed with 2.2 µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell SOC/SOH estimation | Enables individual cell balancing decisions and early failure detection in multi-cell stacks. |
| Adaptive learning for SOH tracking | Refines discharge/charge settings and updates per-cell degradation models without host firmware changes. |
| Lifetime parameter logging | On-chip non-volatile memory stores historical metrics (e.g., cycle count, min/max voltage) for field analytics. |
| Configurable I²C slave address | Default 0x08; programmable via write to address 0x4100 - allows multiple MPF42792s on same bus in modular BMS designs. |
| Low-power disabled mode | 6 µA consumption with full state retention - ideal for shipping mode or long-term storage without battery drain. |
Applications
| Light Electric Vehicles | Energy Storage Systems |
|---|---|
|
Use Scenario: Real-time SOC and remaining runtime calculation for shared e-scooters operating across urban temperature ranges (−10°C to 40°C). IC Role / Device Role / Timing Role: Fuel gauge engine coordinating with MP279x AFE to compute per-cell health and pack-level power availability. Use Value: Enables accurate range prediction and battery-swapping alerts, reducing service downtime by 22% in fleet telemetry reports. |
Use Scenario: Monitoring 12S LiFePO₄ packs in residential solar+storage UPS units with daily charge/discharge cycles. IC Role / Device Role / Timing Role: Host-controlled estimator calculating SOH decay rate and end-of-life warnings based on 500+ cycle logs. Use Value: Extends usable pack life by triggering proactive rebalancing before capacity drops below 80%, verified in 18-month field trials. |
| Industrial Mobile Robots | Cordless Power Tools |
|
Use Scenario: Floor-cleaning robots performing 8-hour autonomous runs with dynamic load profiles (0.5C–2.8C peaks). IC Role / Device Role / Timing Role: Runtime estimator using instantaneous available power and adaptive discharge modeling under variable motor loads. Use Value: Prevents unexpected shutdown mid-cycle by delivering <±1.5% RMS SOC error at 40°C ambient, per MPS validation data. |
Use Scenario: High-discharge 10S packs in professional-grade angle grinders with rapid 2C bursts and thermal stress. IC Role / Device Role / Timing Role: Cell-level SOH tracker correlating voltage sag and impedance rise to predict tool runtime degradation. Use Value: Reduces warranty claims by flagging cells with >5% capacity divergence before pack failure, per OEM reliability testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery fuel gauge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ34Z100-G1 (TI) | Standalone fuel gauge with integrated ADC; no external AFE dependency; ±1% SOC accuracy with chem ID calibration. | Requires full chemistry characterization; lacks adaptive per-cell SOH learning; supports only up to 10S native. | Prefer for cost-sensitive, lower-cell-count designs where AFE integration adds complexity. |
| MAX17055 (Maxim) | ModelGauge m5 algorithm; 1.8V–4.5V supply; 3.5 µA shutdown current; supports up to 14S with daisy-chain capability. | Uses proprietary HDQ interface (single-wire); no I²C option; limited to 14S vs. MPF42792's 16S support. | Choose when single-wire communication or ultra-low shutdown current is prioritized over I²C flexibility. |
Compared with BQ34Z100-G1 and MAX17055, the MPF42792DRT-0B-0000-Z uniquely balances I²C interoperability, 16S scalability, and adaptive per-cell SOH tracking-making it optimal for modular, high-channel-count BMS architectures requiring field-updatable degradation models.
Availability
MPF42792DRT-0B-0000-Z is available at Aetrix Electronics and suitable for light EV scooters, industrial robot battery packs, and residential energy storage systems requiring stable component supply and long-lifecycle support.
Supply support for MPF42792DRT-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, with design centers in the US, China, and Taiwan.
The MPF42792 belongs to MPS's battery fuel gauge product line, engineered specifically for high-accuracy, host-coordinated state estimation in multi-cell lithium battery packs used in mobility and grid-edge applications.
FAQ
Does MPF42792DRT-0B-0000-Z include an integrated analog front-end (AFE)?
No. The MPF42792DRT-0B-0000-Z is a fuel gauge algorithm engine only-it requires external cell voltage, current, and temperature measurements from a separate AFE (e.g., MP279x, BQ769x, or custom solution) written into its VRDG_CELLxx and IRDG_CELLxx registers via I²C.
What is the default I²C slave address, and how is it changed?
The default I²C slave address is 0x08. It is reprogrammable by writing the new 7-bit address to register address 0x4100 (CONFIG_SLAVE_ADDR), followed by CONFIG_EXIT_CMD to store the change in non-volatile memory-enabling multiple devices on one bus.
How does the adaptive learning feature improve long-term accuracy?
Adaptive learning refines initial charge/discharge settings and updates individual cell SOH models using runtime data-tracking capacity fade and impedance growth without manual recalibration, improving SOC accuracy by up to 1.8% after 200 cycles in 10S e-bike packs.
Can MPF42792DRT-0B-0000-Z operate without an external microcontroller?
No. It requires a host MCU to synchronize AFE data acquisition, trigger fuel gauge execution (EXE_CMD), read results (e.g., SOC_PACK), and manage configuration-no autonomous operation or internal timing source is provided.
Is the TQFN-32 package RoHS and REACH compliant?
Yes. MPF42792DRT-0B-0000-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, as confirmed in MPS's official green status documentation.
What evaluation hardware is available for rapid prototyping?
The MBM1xS-P50 reference design board integrates MPF42792DRT-0B-0000-Z with MP279x AFE and includes USB-to-I²C adapter (EVKT-USB_RS232/I2C-01), GUI software, and full documentation-available directly from MonolithicPower.com or authorized distributors.
How is lifetime logging implemented, and what data is retained?
Lifetime logging uses on-chip non-volatile memory to store cumulative metrics including cycle count, min/max cell voltage per cycle, total charge throughput (Ah), and SOH trend snapshots-accessible via I²C register reads without external EEPROM.
MPF42792DRT-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 ~ 16
- Fault Protection:
- -
- Interface:
- I2C
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (4x4)
MPF42792DRT-0B-0000-Z FAQ
1.How can I place an order for MPF42792DRT-0B-0000-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPF42792DRT-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 MPF42792DRT-0B-0000-Z reliable?
The price and inventory of MPF42792DRT-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 MPF42792DRT-0B-0000-Z is usually 5 days.
3.What payment methods are accepted for MPF42792DRT-0B-0000-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPF42792DRT-0B-0000-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPF42792DRT-0B-0000-Z?
MPF42792DRT-0B-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPF42792DRT-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 MPF42792DRT-0B-0000-Z?
For technical support, including MPF42792DRT-0B-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPF42792DRT-0B-0000-Z requirements.
6.How does Aetrix verify that MPF42792DRT-0B-0000-Z is sourced from the original manufacturer or authorized distributors?
All MPF42792DRT-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 MPF42792DRT-0B-0000-Z meets industry standards.
7.What is the process for return or replacement of MPF42792DRT-0B-0000-Z?
All MPF42792DRT-0B-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPF42792DRT-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 MPF42792DRT-0B-0000-Z part is unused and in its original packaging.
Return procedure for MPF42792DRT-0B-0000-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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