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Monolithic Power Systems Inc. MP2639BGR-Z
- Part No.:
- MP2639BGR-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Battery Chargers
- Package:
- 26-PowerVFQFN
- Datasheet:
-
MP2639BGR-Z.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 26QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MP2639BGR-Z from Monolithic Power Systems is a bidirectional switch-mode battery management IC for single-cell Li-ion/Li-polymer systems, operating in charge (buck), discharge (boost), and sleep modes. It supports 4.5V–16V input range, delivers up to 5A programmable charge current and 3A boost output, and integrates NTC-based JEITA temperature regulation, 4-LED fuel gauge, and USB PD-compatible OTG functionality - deployed in portable power banks and mobile internet devices.
For engineers reviewing the MP2639BGR-Z datasheet, MP2639BGR-Z pinout, MP2639BGR-Z application, or MP2639BGR-Z equivalent, key selection criteria include its dual-mode operation logic (MODE pin control), programmable input/battery current limits via external resistors (ISET/ILIM/OLIM), thermal regulation at 134°C, ±0.5% 4.35V charge voltage accuracy, and integrated short-circuit protection in boost mode.
Technical Context
The MP2639BGR-Z implements a synchronous buck topology in charge mode (Q1 high-side, Q2 low-side) and synchronous boost topology in discharge mode (Q2 active switch, Q1 synchronous rectifier), with internal MOSFETs having RON of 17mΩ (Q1), 25mΩ (Q2), and 12mΩ (reverse-blocking FET). Its adaptive control loop uses 1.2V internal reference for both VIN feedback (charge) and FB feedback (discharge), with programmable oscillator frequency (1150–1450kHz) set by TMR capacitor.
Operation is governed by three digital inputs: MODE selects direction (LOW = charge, HIGH = discharge), P-----B----- enables/disables discharge via push-button timing (≤2.5s toggle), and ACOK/CHGOK provide open-drain status signaling. Battery voltage monitoring drives four independent LED outputs with hysteresis-based thresholds across 8 discrete fuel gauge levels (4 rising, 4 falling).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - covers USB PD 5V/9V/12V/15V profiles and legacy adapters without external regulation. |
| Charge Current | Up to 5A programmable via ISET resistor - enables fast charging of high-capacity 1S packs (e.g., 10,000mAh+ power banks). |
| Charge Voltage Accuracy | 4.35V ±0.5% - ensures safe full-charge termination for standard Li-ion cells without overvoltage stress. |
| Boost Output Range | 5V to 16V programmable via FB divider - supports USB PD sink negotiation and multi-voltage OTG output. |
| Boost Output Current | Up to 3A programmable via OLIM resistor - sustains 15W–48W output (e.g., [email protected]) from 3.0–4.2V battery. |
| Thermal Regulation Threshold | 134°C - actively throttles charge/discharge current before reaching 155°C shutdown, preserving continuous operation under load. |
| JEITA Temp Protection | Four-zone NTC monitoring (cold/cool/warm/hot) with hysteresis - prevents charging below 0°C or above 45°C per IEC 62133. |
| Fuel Gauge Resolution | 4-level LED indication with voltage hysteresis (e.g., 3.11V–4.14V thresholds) - provides stable state-of-charge display during dynamic load changes. |
Pinout & Package
MP2639BGR-Z is housed in a thermally enhanced 4mm × 4mm QFN-26 package with exposed thermal pad (PGND-connected), optimized for high-current switching and compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 BATT | Battery terminal | Direct connection to single-cell anode; reverse leakage blocking FET prevents drain during standby. |
| 3 IN | Input power supply | Accepts 4.5–16V source; UVLO (3.8V) and OVLO (19.5V) protect against adapter faults. |
| 4 SW | Switching node | Connects to inductor center tap; carries high di/dt in both buck and boost modes. |
| 5 PGND | Power ground | Mandatory tie to exposed pad and system GND plane for thermal dissipation and low-impedance return path. |
| 6 BST | Bootstrap supply | Drives high-side gate via external BST capacitor; enables efficient 100% duty-cycle operation in buck mode. |
| 7 P-----B----- | Push-button input | Internal pull-up; <2.5s press enables discharge latch, >2.5s disables - eliminates need for MCU GPIO control. |
| 8 MODE | Mode selection | Logic LOW = charge (buck), HIGH = discharge (boost); sets internal topology and feedback path routing. |
| 11 TMR | Oscillator timer | External capacitor sets safety timer (e.g., 0.1µF = 370 min max charge time) and pre-charge timeout. |
| 13–16 LED1–LED4 | Fuel gauge outputs | Open-drain drivers; each activates based on VBATT threshold crossing with hysteresis for flicker-free indication. |
| 17 FB | Discharge feedback | Voltage divider input for boost output regulation; 1.2V reference enables precise 5–16V output programming. |
| 18 VLIM | Input voltage limit | Resistor divider sets maximum input voltage accepted during charge - prevents overvoltage stress on internal FETs. |
| 19 VNTC / 20 NTC | Temperature sensing | VNTC supplies bias to NTC thermistor; NTC pin reads voltage ratio to determine battery temp per JEITA zones. |
| 21 IB | Battery current monitor | Current-source output proportional to battery current - used for light-load discharge monitoring and SOC estimation. |
| 22 OLIM | Output current limit | Resistor to AGND programs boost output current limit (0.5–3.3A) - protects battery and inductor during heavy loads. |
| 23 ISET | Charge current set | Resistor to AGND programs constant-current charge level (0.94–4.6A) - defines fast-charge rate and thermal profile. |
| 24 ILIM | Input current limit | Resistor to AGND sets max input current (0.4–3A) - enforces USB PD current contracts and prevents adapter overload. |
| 25 ACOK | Input valid indicator | Open-drain output pulled LOW when IN is within valid UVLO/OVLO window - signals host controller of ready power source. |
| 26 CHGOK | Charge completion | Open-drain output pulled LOW during active charge; floats after termination - direct interface to status LED or MCU interrupt. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional topology with integrated FETs | Eliminates need for external MOSFETs or direction-control logic - reduces BOM count and PCB area in dual-role power banks. |
| Programmable JEITA-compliant temperature zones | Four NTC thresholds (cold/cool/warm/hot) with hysteresis ensure safe charging/discharging across -10°C to +50°C ambient. |
| Integrated 4-LED fuel gauge with hysteresis | Provides visual SOC without microcontroller - thresholds calibrated to battery voltage curve with 295–306mV hysteresis per level. |
| USB PD-compatible OTG boost output | Supports 5–16V programmable output with 3A peak current - enables direct compatibility with USB PD sink negotiation chips (e.g., CYPD3177). |
| Auto-recharge and safety timer backup | Re-initiates charge when VBATT drops to 4.14V post-full; 370-minute max timer prevents indefinite charging of faulty cells. |
| Internal reverse battery leakage blocking | 12mΩ RON reverse-blocking FET cuts off battery drain in sleep mode - achieves 20μA shutdown current at 3.7V. |
Applications
| USB PD Power Banks | Portable Power Stations |
|---|---|
|
Use Scenario: Compact, high-capacity power banks supporting USB-C PD input (up to 100W) and dual-output PD/PPS discharge. IC Role / Device Role / Timing Role: Bidirectional charger/booster managing 1S Li-ion pack; handles input current limiting, battery voltage regulation, and OTG voltage negotiation. Use Value: Enables single-chip 5V–16V bidirectional conversion with 84–92% efficiency across 1–5A loads - reducing thermal design complexity vs. discrete buck-boost solutions. |
Use Scenario: 200–1000Wh portable solar generators with AC inverter, USB-C PD ports, and DC outputs. IC Role / Device Role / Timing Role: Primary battery management IC coordinating solar/AC/USB input charging and regulated DC output generation. Use Value: Integrated thermal regulation (134°C throttle) and JEITA protection allow safe operation in outdoor environments - eliminating need for external thermal sensors or firmware calibration. |
| Mobile Internet Devices | Industrial Handheld Terminals |
|
Use Scenario: Ruggedized tablets and hotspots requiring long runtime, rapid recharge, and USB OTG host capability. IC Role / Device Role / Timing Role: System power manager handling battery charging, system rail generation (via boost), and fuel gauge reporting. Use Value: 4-LED fuel gauge with hysteresis provides accurate, flicker-free battery level indication - critical for field-deployed devices with no display-based SOC feedback. |
Use Scenario: Barcode scanners, RFID readers, and portable test equipment powered by removable 1S Li-ion batteries. IC Role / Device Role / Timing Role: Standalone battery interface providing charge control, discharge regulation, and fault-safe shutdown. Use Value: Push-button discharge enable (P-----B-----) allows field technicians to activate OTG power without software - simplifying user interface and firmware requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional battery management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ25895RTWR | Single-direction (charge-only) with separate boost IC required; 3A max charge; no integrated NTC JEITA zones. | Lacks native discharge mode - requires external boost converter and MCU coordination for OTG. | Select when cost-sensitive designs prioritize charge efficiency over bidirectional integration. |
| IP2326 | Integrated 2S support; lower 3.5A charge current; no programmable boost voltage - fixed 5V/9V/12V outputs. | Designed for dual-cell power banks; lacks flexible 5–16V programmable OTG output. | Select for 2S applications where fixed-output OTG suffices and higher cell count is needed. |
Compared with BQ25895RTWR and IP2326, the MP2639BGR-Z uniquely combines true bidirectional operation, wide 5–16V programmable boost, and full JEITA compliance in one QFN-26 package - making it optimal for compact, USB PD-native 1S power delivery systems requiring minimal external components.
Availability
MP2639BGR-Z is available at Aetrix Electronics and suitable for USB PD power banks, portable power stations, and mobile internet devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP2639BGR-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 analog and power ICs, with core expertise in DC/DC conversion, battery management, and motor control.
The MP2639BGR-Z belongs to MPS's bidirectional battery management product line, engineered specifically for compact, high-efficiency 1S portable power systems requiring integrated charge, boost, and intelligent protection - targeting USB PD ecosystem compliance and field-reliable operation.
FAQ
What is the function of the P-----B----- pin, and how does it interact with the MODE pin?
The P-----B----- pin is a dedicated push-button input with internal pull-up. When MODE is HIGH (discharge mode), a short press (<2.5s) latches discharge enable and activates LEDs; a long press (>2.5s) disables it. In charge mode (MODE=LOW), the pin has no effect. This hardware-based control eliminates MCU dependency for basic OTG activation.
How is charge termination determined, and what happens after full charge?
Charge terminates when battery voltage reaches 4.35V ±0.5% and charge current falls to 5–17.5% of programmed ICC. After termination, CHGOK goes high-impedance, and the device enters sleep mode. If VBATT drops to 4.14V, auto-recharge initiates - restarting the full three-phase cycle without external intervention.
Can the MP2639BGR-Z support USB PD communication, or is it only compatible with fixed-voltage sources?
The MP2639BGR-Z itself does not implement USB PD protocol negotiation. However, its 5–16V programmable boost output and wide input range make it fully compatible with USB PD systems: it accepts negotiated voltages (5V/9V/12V/15V) at IN and delivers corresponding OTG outputs via FB programming - requiring only a companion PD controller (e.g., CYPD3177) for full protocol handling.
What thermal management features prevent overheating during sustained 5A charging?
The MP2639BGR-Z employs dual thermal safeguards: die temperature regulation at 134°C (reducing charge current to maintain safe junction temp) and hard thermal shutdown at 155°C. Combined with 42°C/W θJA in QFN-26 and PGND-exposed pad layout, this enables continuous 5A charging at TA ≤45°C with proper PCB copper area.
How does the fuel gauge LED logic handle battery voltage hysteresis during discharge?
The four LEDs use eight distinct voltage thresholds (four rising, four falling) with 295–306mV hysteresis per step. During discharge, LED4 turns off at 4.14V (falling), LED3 at 3.93V, LED2 at 3.73V, and LED1 at 3.11V - preventing oscillation near threshold crossings and ensuring stable visual indication even under pulsed loads.
Is external compensation required for the charge or boost control loops?
No external compensation is required. The MP2639BGR-Z integrates type-II compensation networks for both buck (charge) and boost (discharge) loops. Stability is ensured across all operating conditions using internal transconductance amplifiers and fixed-gain error amplifiers - verified per typical application circuits in the datasheet.
What protection mechanisms guard against short-circuit events in boost mode?
In boost mode, the MP2639BGR-Z includes integrated short-circuit protection that detects output overcurrent via OLIM resistor feedback. Upon fault, it limits peak inductor current, cycles into hiccup mode, and asserts CHGOK low. Recovery occurs automatically after fault removal - no latch or reset required.
MP2639BGR-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 26-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- Over Current, Over Temperature, Over Voltage, Short Circuit
- Charge Current - Max:
- 3A
- Battery Pack Voltage:
- 4.5V
- Voltage - Supply (Max):
- 16V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 26-QFN (4x4)
MP2639BGR-Z FAQ
1.How can I place an order for MP2639BGR-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2639BGR-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 MP2639BGR-Z reliable?
The price and inventory of MP2639BGR-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2639BGR-Z is usually 5 days.
3.What payment methods are accepted for MP2639BGR-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2639BGR-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2639BGR-Z?
MP2639BGR-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2639BGR-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 MP2639BGR-Z?
For technical support, including MP2639BGR-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2639BGR-Z requirements.
6.How does Aetrix verify that MP2639BGR-Z is sourced from the original manufacturer or authorized distributors?
All MP2639BGR-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 MP2639BGR-Z meets industry standards.
7.What is the process for return or replacement of MP2639BGR-Z?
All MP2639BGR-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2639BGR-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 MP2639BGR-Z part is unused and in its original packaging.
Return procedure for MP2639BGR-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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