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Microchip Technology MCP73827-4.1VUA
- Part No.:
- MCP73827-4.1VUA
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP73827-4.1VUA.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,447
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Product details
Overview
MCP73827-4.1VUA from Microchip Technology is a linear single-cell lithium-ion battery charge management controller in an 8-pin MSOP package, featuring 4.1 V ±1% voltage regulation, programmable fast-charge current via external sense resistor, automatic preconditioning for deeply depleted cells (≤2.4 V), and open-drain MODE output for charge-phase indication. It operates from 4.5 V to 5.5 V input and supports industrial temperature range (–20°C to +85°C), targeting compact portable chargers with minimal external components.
For engineers reviewing the MCP73827-4.1VUA datasheet, MCP73827-4.1VUA pinout, MCP73827-4.1VUA application, or MCP73827-4.1VUA equivalent, this page delivers verified technical context including preconditioning foldback ratio (0.43× peak current), IMON monitor gain (26 V/V), VDRV gate-drive capability (1 mA sink/source), thermal resistance (206 °C/W), and precise pin-level circuit roles - all confirmed for the exact MCP73827-4.1VUA variant.
Technical Context
The MCP73827-4.1VUA implements a three-phase charge algorithm: preconditioning (foldback current at ≤2.4 V cell voltage), controlled-current fast charge (regulated by VSNS–VDRV differential and RSENSE), and constant-voltage termination (4.1 V ±1% over –20°C to +85°C). Its analog control loop uses internal 1.2 V reference, precision resistor divider on VBAT, and dedicated charge-current monitor amplifier feeding IMON.
Digital logic governs SHDN-driven enable/disable (0.5 µA shutdown current), MODE open-drain status signaling (low during preconditioning/fast-charge, high-Z in CV mode), and automatic power-down when VIN < VBAT. The device drives external P-channel MOSFETs (e.g., NDS8434) via VDRV, with gate drive limited to 1 mA sink/source and minimum 1.6 V output swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Regulation Voltage | 4.1 V ±1% - fixed preset for coke-anode Li-ion cells; ensures safe full-charge termination without overvoltage stress. |
| Input Voltage Range | 4.5 V to 5.5 V - matches standard USB/5 V wall adapters; device powers down if VIN drops below VBAT to prevent battery drain. |
| Charge Current Control | Programmable via external RSENSE - 100 mΩ yields ~530 mA peak; foldback scale factor = 0.43× peak for safe preconditioning. |
| IMON Monitor Gain | 26 V/V - provides amplified (VIN–VSNS) signal for microcontroller ADC reading of real-time charge current. |
| MODE Output Logic | Open-drain - low during preconditioning & fast-charge (≤2.4 V to VREG); high-Z in constant-voltage phase for LED or MCU edge detection. |
| Thermal Resistance | θJA = 206 °C/W - defines junction-to-ambient rise under linear dissipation; requires careful PCB copper area for >500 mA applications. |
| Operating Temperature | –20°C to +85°C - fully specified ambient range; enables use in consumer handhelds and industrial cradle chargers. |
Pinout & Package
Package: 8-pin MSOP (UA), 3.0 mm × 4.9 mm body, 0.65 mm pitch, 0.85 mm nominal molded thickness. Pin 1 marked with dot or bevel; GND (Pin 2) and VBAT (Pin 5) require low-impedance PCB routing for stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Logic Shutdown Input | Active-high enable; pull to VIN for auto-start, to GND to terminate charge; leakage ≤1 µA. |
| 2 GND | Battery Reference Node | 0 V return for battery negative terminal and internal analog/digital blocks; must connect directly to battery cathode. |
| 3 MODE | Charge Status Output | Open-drain indicator: low = preconditioning or fast-charge; high-Z = constant-voltage or battery disconnected. |
| 4 IMON | Charge Current Monitor | Analog output = 26×(VIN–VSNS); used with MCU ADC to track real-time charging current without shunt resistor duplication. |
| 5 VBAT | Cell Voltage Sense Input | Direct connection to battery anode; internal 1.2 V reference divider sets 4.1 V regulation; bypass ≥10 µF to GND for stability. |
| 6 VDRV | P-Channel MOSFET Gate Driver | Linear drive output for external pass transistor; sinks up to 1 mA in CV mode; turns off automatically if VIN < VBAT. |
| 7 VSNS | Current Sense Input | Sense node between VIN and MOSFET source; voltage drop across RSENSE sets fast-charge current (VCS = 40–75 mV). |
| 8 VIN | Input Supply | 4.5–5.5 V power input; bypass ≥10 µF to GND; supplies internal circuitry and drives VDRV gate output. |
Key Features
| Feature | Design Value |
|---|---|
| Preconditioning Foldback | Automatically applies ~43% of peak charge current to cells ≤2.4 V, preventing damage and minimizing MOSFET heat during recovery. |
| High-Accuracy Regulation | ±1% 4.1 V regulation over full –20°C to +85°C range and 4.5–5.5 V input, eliminating need for external trimming or calibration. |
| Integrated Charge Monitoring | IMON pin delivers 26× scaled version of sense-resistor voltage, enabling precise software-controlled charge profiling without extra op-amps. |
| Auto Power-Down | Enters 0.5 µA shutdown state when VIN falls below VBAT, eliminating parasitic battery discharge in unpowered cradle or dock scenarios. |
| Robust Thermal Protection | Specified θJA = 206 °C/W on standard SEMI G42-88 board; design guidance provided for copper area, vias, and MOSFET selection to maintain <125°C junction. |
Applications
| Personal Data Assistants | Cellular Telephones |
|---|---|
Use Scenario: Compact handheld PDA with removable Li-ion battery requiring space-constrained, cost-effective charging circuitry. IC Role / Device Role / Timing Role: Standalone linear charge controller managing full CC/CV profile, preconditioning, and status signaling without host MCU intervention. Use Value: Eliminates need for discrete op-amps, comparators, and timers; 8-pin MSOP reduces PCB area vs. competing solutions while maintaining ±1% voltage accuracy. |
Use Scenario: Feature phone with integrated charger supporting rapid recharge from 5 V USB port. IC Role / Device Role / Timing Role: Primary battery management IC regulating charge current and voltage, driving external P-MOSFET, and indicating charge phase via MODE pin. Use Value: Enables reliable 1C fast charge (e.g., 500 mA for 500 mAh pack) with automatic transition to CV mode and timer-free termination using IMON monitoring. |
| Hand Held Instruments | Cradle Chargers |
Use Scenario: Portable multimeter or gas detector with sealed Li-ion battery and no user-serviceable charging port. IC Role / Device Role / Timing Role: Embedded charge manager providing safe, autonomous charging with deep-discharge recovery and thermal-aware operation. Use Value: Preconditioning protects against cell damage from storage-induced voltage sag; IMON feedback allows firmware logging of charge health metrics. |
Use Scenario: Desktop docking station that charges multiple devices simultaneously, where each port includes independent linear charging. IC Role / Device Role / Timing Role: Dedicated charge controller per port, handling input qualification, current programming, and status reporting to host system. Use Value: MODE pin simplifies LED status indication per port; SHDN pin enables host-controlled charge enable/disable for power sequencing and fault isolation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear single-cell lithium-ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP73831T-410I/OT | Single-chip solution with integrated MOSFET; 4.1 V regulation; SOT-23-5 package; no IMON or MODE pins. | Lacks current monitoring and explicit charge-phase indication; suited for ultra-low-cost, space-limited designs where firmware visibility is not required. | Select MCP73831T-410I/OT only if external MOSFET elimination and smallest footprint outweigh loss of IMON diagnostics and MODE status signaling. |
| BQ24075RGTR | 4.2 V fixed regulation; integrated 1.2 A FET; I²C interface; thermal regulation; different pinout and enable logic. | Requires host MCU for configuration and status readback; supports higher current but incompatible voltage setpoint for coke-anode cells. | Choose BQ24075RGTR only when 4.2 V graphite-anode compatibility, I²C control, and integrated FET are mandatory - not a direct functional substitute for MCP73827-4.1VUA. |
Compared with MCP73827-4.1VUA, MCP73831T-410I/OT trades diagnostic capability and external FET flexibility for integration and size reduction, while BQ24075RGTR shifts to a programmable, digitally managed architecture incompatible with standalone analog operation and 4.1 V regulation requirements.
Availability
MCP73827-4.1VUA is available at Aetrix Electronics and suitable for personal data assistants, cellular telephones, and hand-held instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for production programs.
Supply support for MCP73827-4.1VUA 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
Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and battery management ICs, with broad industrial and automotive qualification coverage.
The MCP73827 product line delivers cost-optimized, space-efficient linear charge controllers for single-cell Li-ion systems where simplicity, reliability, and minimal external components are prioritized over programmability or integrated FETs.
FAQ
What is the exact regulated output voltage of the MCP73827-4.1VUA?
The MCP73827-4.1VUA is factory-trimmed to deliver 4.1 V regulation with a maximum tolerance of ±1% across –20°C to +85°C ambient temperature and 4.5 V to 5.5 V input voltage. This corresponds to a guaranteed range of 4.059 V to 4.141 V, specifically optimized for lithium-ion cells with coke-based anodes.
How does the MCP73827-4.1VUA handle deeply discharged batteries?
The MCP73827-4.1VUA initiates automatic preconditioning when the battery voltage at VBAT is below 2.4 V (typical threshold), applying a reduced foldback current equal to approximately 43% of the programmed peak fast-charge current. This prevents thermal stress on the cell and external MOSFET while safely recovering capacity before entering controlled-current mode.
Can the MCP73827-4.1VUA operate without a microcontroller?
Yes, the MCP73827-4.1VUA is designed for stand-alone operation: it autonomously executes the full CC/CV charge algorithm, manages preconditioning, terminates charge via MODE-triggered timer or IMON current threshold, and signals status via the open-drain MODE pin - all without host MCU intervention.
What external components are mandatory for basic operation of the MCP73827-4.1VUA?
Mandatory external components for the MCP73827-4.1VUA include: an external P-channel MOSFET (e.g., NDS8434), current-sense resistor (RSENSE) to set peak charge current, ≥10 µF capacitor from VBAT to GND for loop stability, ≥10 µF capacitor from VIN to GND, and a pull-up resistor on MODE for LED indication or MCU interface.
What is the function of the IMON pin on the MCP73827-4.1VUA?
The IMON pin on the MCP73827-4.1VUA provides an analog voltage output equal to 26× the voltage difference between VIN and VSNS, directly proportional to the instantaneous charge current. This enables precise real-time current monitoring using a microcontroller's ADC, supporting smart charge termination, health logging, and dynamic current adjustment.
MCP73827-4.1VUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- 4.1V
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP73827-4.1VUA FAQ
1.How can I place an order for MCP73827-4.1VUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73827-4.1VUA 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 MCP73827-4.1VUA reliable?
The price and inventory of MCP73827-4.1VUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73827-4.1VUA is usually 5 days.
3.What payment methods are accepted for MCP73827-4.1VUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73827-4.1VUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73827-4.1VUA?
MCP73827-4.1VUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73827-4.1VUA 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 MCP73827-4.1VUA?
For technical support, including MCP73827-4.1VUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73827-4.1VUA requirements.
6.How does Aetrix verify that MCP73827-4.1VUA is sourced from the original manufacturer or authorized distributors?
All MCP73827-4.1VUA 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 MCP73827-4.1VUA meets industry standards.
7.What is the process for return or replacement of MCP73827-4.1VUA?
All MCP73827-4.1VUA units undergo pre-shipment inspection (PSI). If there is an issue with MCP73827-4.1VUA, 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 MCP73827-4.1VUA part is unused and in its original packaging.
Return procedure for MCP73827-4.1VUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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