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Microchip Technology MCP73862-I/SL
- Part No.:
- MCP73862-I/SL
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MCP73862-I/SL.pdf
- Description:
- IC BATT CNTRL LI-ION 2CEL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
MCP73862-I/SL from Microchip Technology is a dual-cell Li-ion/Li-polymer linear charge management controller with integrated P-channel pass transistor, current sense, and reverse-blocking protection. It delivers 8.2V or 8.4V regulation (±0.5%), programmable up to 1.2A fast-charge current, safety timers, preconditioning, and thermal regulation - designed for space-constrained cradle chargers and handheld instruments.
For engineers reviewing the MCP73862-I/SL datasheet, MCP73862-I/SL pinout, MCP73862-I/SL application, or MCP73862-I/SL equivalent, this page provides verified electrical specs, QFN/SOIC package mapping, thermal shutdown behavior (155°C), VSET-selectable voltage options, and real-world use cases in dual-series battery systems requiring precise CV/CC control and cell temperature monitoring.
Technical Context
The MCP73862-I/SL implements a fully autonomous linear charging algorithm with three distinct phases: preconditioning (trickle-charge at ~10% of IREG when VBAT < 5.4–5.9V), constant-current fast charge (programmable 100–1200 mA via PROG resistor), and constant-voltage regulation (8.2V/8.4V ±0.5% with line/load regulation ≤0.25%). It uses internal reference-based thermistor biasing (THREF = 2.55V typ.) and dual-threshold comparators (VT1 = 1.25V, VT2 = 0.62V) for NTC/PTC temperature qualification.
Charge termination is triggered by either current decay below 8% of IREG or elapsed time (2.2–3.8 hrs), while automatic recharge initiates when VBAT falls below VREG −200 to −600 mV. UVLO thresholds are asymmetric (VSTART = 8.45–9.05V, VSTOP = 8.40–8.95V) to prevent oscillation during supply brownout, and thermal regulation dynamically scales IREG above 125°C before full shutdown at 155°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 8.2V or 8.4V ±0.5% - selectable via VSET pin; enables safe charging of dual-series Li-ion packs with graphite/coke anodes. |
| Fast Charge Current | 100–1200 mA - set by external PROG resistor; supports high-power portable devices without external current-sense amplifiers. |
| Input Voltage Range | 8.7V to 12V - ensures compatibility with regulated 9V/12V wall adapters and avoids UVLO dropout during transient dips. |
| Thermal Shutdown | 155°C with 10°C hysteresis - protects IC and battery under sustained overload or poor PCB thermal design. |
| Precondition Threshold | 5.4–5.9V - prevents damage to deeply depleted dual-cell batteries by initiating safe trickle-charge before CC mode. |
| Charge Termination | Current-based (≤8% of IREG) or timer-based (2.2–3.8 hrs) - dual-fault detection ensures reliable end-of-charge without overvoltage risk. |
| Operating Temp | −40°C to +85°C - validated across industrial ambient range; die temperature monitored internally for dynamic current scaling. |
Pinout & Package
Package: 16-pin SOIC (MCP73862-I/SL) and 16-pin 4×4 mm QFN (MCP73862-I/MQ). Both packages share identical pin functions and electrical specifications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSET | Voltage regulation selection | Connect to VSS for 8.2V output or VDD for 8.4V; sets final CV threshold for dual-cell battery pack. |
| VDD1, VDD2 | Battery management input supply | Dual VDD pins reduce trace resistance; require ≥4.7 µF ceramic bypass to ground for stability and UVLO immunity. |
| VSS1, VSS2, VSS3 | 0V reference | Three separate ground pins minimize ground bounce; must connect to common battery negative and supply return. |
| PROG | Current regulation set | Resistor-to-ground sets fast charge (IREG), precondition (IPREG), and termination (ITERM) currents proportionally. |
| THERM | Cell temperature sensor input | Accepts voltage divider output from NTC/PTC thermistor; compared against THREF/2 and THREF/4 thresholds. |
| THREF | Thermistor reference bias | 2.55V ±2.5% precision reference (200 µA source); enables ratiometric temperature sensing without external DAC. |
| VBAT1, VBAT2 | Battery charge control output | Drain terminals of internal P-MOSFET pass device; connect directly to battery positive terminal with ≥4.7 µF local decoupling. |
| VBAT3 | Battery voltage sense | High-impedance feedback node tied to battery+ via internal precision divider; enables accurate VREG regulation independent of VBAT trace IR drop. |
| STAT1, STAT2 | Status outputs | Open-drain, current-limited (4–12 mA sink); STAT1 flashes on completion (MCP73862), STAT2 indicates fault condition. |
| EN | Logic enable | Active-high input; forces charge termination, clears faults, or disables auto-recharge when pulled low. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-channel pass transistor | Eliminates external MOSFET and gate driver; reduces BOM count and layout area in compact cradle chargers. |
| Reverse-blocking protection | Prevents battery discharge into disconnected input supply; critical for USB-powered or field-replaceable adapters. |
| Programmable safety timers | Independent fast-charge (1.1–1.9 hr), precondition (45–75 min), and elapsed-time (2.2–3.8 hr) timers prevent thermal runaway. |
| Automatic power-down | Enters <4 µA standby when VDD drops below UVLO stop threshold; preserves battery energy during adapter removal. |
| Thermal regulation | Dynamically reduces IREG above 125°C to maintain safe junction temperature without halting charge entirely. |
Applications
| Medical Handheld Diagnostics | Industrial Barcode Scanners |
|---|---|
Use Scenario: Portable diagnostic device with dual-series Li-ion battery used in hospital wards and field clinics. IC Role / Device Role / Timing Role: Linear charge controller managing CV/CC profile, cell temperature monitoring, and fault-safe termination. Use Value: Enables certified medical-grade charging compliance (IEC 62368-1) with ±0.5% voltage accuracy and thermal foldback below 155°C. |
Use Scenario: Ruggedized barcode scanner deployed in warehouses with frequent hot-swap battery usage. IC Role / Device Role / Timing Role: Autonomous charger handling deep-discharge recovery, UVLO hysteresis, and reverse leakage suppression (<1 µA). Use Value: Supports >5000 charge cycles via preconditioning (5.4–5.9V threshold) and eliminates need for host MCU intervention. |
| Wireless Test Equipment | Mobile Point-of-Sale Terminals |
Use Scenario: Battery-powered oscilloscope module requiring stable 8.4V rail for analog front-end operation. IC Role / Device Role / Timing Role: Precision voltage regulator with 0.025%/V line regulation and 60 dB PSRR at 1 kHz. Use Value: Maintains measurement accuracy by minimizing supply ripple coupling into sensitive analog signal paths. |
Use Scenario: EMV-compliant payment terminal with dual-cell Li-ion pack and LED status indicators. IC Role / Device Role / Timing Role: Dual open-drain status outputs (STAT1/STAT2) drive LEDs directly without external transistors. Use Value: Reduces component count and simplifies firmware by providing flash/fault indication natively. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-cell Li-ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24610RGER | Switch-mode architecture (higher efficiency), no integrated pass transistor, requires external MOSFETs and inductor. | Suitable for higher-power (>2A), thermally constrained designs where heat dissipation is critical. | Select BQ24610RGER only if system-level efficiency >85% is required and board space allows inductor placement. |
| LTC4000EGN#PBF | Controller-only (no pass transistor), supports multi-chemistry, wider input range (4.5–32V), but needs external sense resistor and MOSFET. | Used in programmable lab-grade chargers where flexibility across Li-ion, LiFePO₄, and lead-acid is needed. | Choose LTC4000EGN#PBF when designing universal battery test equipment rather than fixed-function embedded chargers. |
Compared with BQ24610RGER and LTC4000EGN#PBF, the MCP73862-I/SL offers lowest BOM count and smallest footprint for cost-sensitive dual-cell applications, trading off efficiency for integration - ideal where thermal headroom exists and simplicity is prioritized over peak power conversion.
Availability
MCP73862-I/SL is available at Aetrix Electronics and suitable for medical handheld diagnostics, industrial barcode scanners, and wireless test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCP73862-I/SL 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 Inc. is a leading provider of microcontrollers, analog components, and interface ICs, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The MCP7386X family was engineered specifically for space-limited, cost-sensitive Li-ion/Li-polymer charging applications - delivering full-featured linear charge control with minimal external components in SOIC and QFN packages.
FAQ
What is the maximum input voltage rating for the MCP73862-I/SL?
The MCP73862-I/SL has an absolute maximum VDD rating of 13.5V. Its operational input range is specified as 8.7V to 12V for dual-cell configurations. Exceeding 12V may trigger UVLO or cause premature thermal shutdown; sustained operation above 13.5V risks permanent damage per DS21893F-page 4 Absolute Maximum Ratings.
How does the MCP73862-I/SL select between 8.2V and 8.4V regulation?
The MCP73862-I/SL selects its regulation voltage via the VSET pin: connecting VSET to VSS configures 8.2V output, while connecting it to VDD selects 8.4V. This choice determines the final constant-voltage threshold applied to the dual-series battery pack and must match the battery manufacturer's recommended charge voltage.
Can the MCP73862-I/SL be used with single-cell Li-ion batteries?
No - the MCP73862-I/SL is explicitly designed for dual-series Li-ion/Li-polymer battery packs (8.2V/8.4V output). Using it with single-cell batteries would overcharge them beyond safe limits. For single-cell applications, Microchip specifies the MCP73861/3 variants (4.1V/4.2V output).
What is the function of the THREF and THERM pins on the MCP73862-I/SL?
THREF provides a 2.55V ±2.5% precision reference to bias an external NTC or PTC thermistor. THERM reads the resulting voltage divider output and compares it against ratiometric thresholds (THREF/2 and THREF/4) to qualify cell temperature before and during charging - enabling safe operation between −40°C and +85°C ambient.
Does the MCP73862-I/SL support automatic recharge after battery voltage drops?
Yes - the MCP73862-I/SL automatically initiates a new charge cycle when VBAT falls below the recharge threshold (VRTH), which is VREG −200 mV to −600 mV depending on configuration. This occurs only if all qualification conditions remain met: VDD above UVLO, EN high, and THERM within valid temperature window.
MCP73862-I/SL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 2
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- Timer
- Fault Protection:
- -
- Charge Current - Max:
- 1.38A
- Battery Pack Voltage:
- 8.4V
- Voltage - Supply (Max):
- 12V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MCP73862-I/SL FAQ
1.How can I place an order for MCP73862-I/SL through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73862-I/SL 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 MCP73862-I/SL reliable?
The price and inventory of MCP73862-I/SL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73862-I/SL is usually 5 days.
3.What payment methods are accepted for MCP73862-I/SL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73862-I/SL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73862-I/SL?
MCP73862-I/SL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73862-I/SL 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 MCP73862-I/SL?
For technical support, including MCP73862-I/SL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73862-I/SL requirements.
6.How does Aetrix verify that MCP73862-I/SL is sourced from the original manufacturer or authorized distributors?
All MCP73862-I/SL 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 MCP73862-I/SL meets industry standards.
7.What is the process for return or replacement of MCP73862-I/SL?
All MCP73862-I/SL units undergo pre-shipment inspection (PSI). If there is an issue with MCP73862-I/SL, 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 MCP73862-I/SL part is unused and in its original packaging.
Return procedure for MCP73862-I/SL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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