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MCP73844T-820I/MS
Microchip Technology
IC BATT CNTL LI-ION 1-2CEL 8MSOP
3163 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 8-MSOP
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5.0 / 5.0
- (71 Ratings)
MCP73844T-820I/MS
Product Overview
1304374
DiGi Electronics Part Number
MCP73844T-820I/MS-DGManufacturer
Microchip Technology
MCP73844T-820I/MS
Description
IC BATT CNTL LI-ION 1-2CEL 8MSOPInventory
3163 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 8-MSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
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MCP73844T-820I/MS Technical Specifications
Category
Power Management (PMIC), Battery Chargers
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Battery Chemistry
Lithium Ion/Polymer
Number of Cells
1 ~ 2
Current - Charging
-
Programmable Features
Timer
Fault Protection
-
Charge Current - Max
-
Battery Pack Voltage
8.2V
Voltage - Supply (Max)
12V
Interface
-
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package
8-MSOP
Base Product Number
MCP73844
Datasheet & Documents
Manuals
Development Tools Catalog
HTML Datasheet
MCP73844T-820I/MS-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
MCP73844T-820I/MSTR
MCP73844T-820I/MSDKR
MCP73844T-820I/MS-NDR
MCP73844T-820I/MS-DG
MCP73844T-820I/MSCT
Standard Package
2,500
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
DiGi Electronics的售後人員超級親切專業，解決問題速度非常快，大大提升了我的購物體驗！
Dec 02, 2025
I’ve been using their gadgets daily for over six months, and they still function flawlessly.
Dec 02, 2025
Packaging materials were of high quality, making sure the product stayed intact.
Dec 02, 2025
The affordability of their products makes technology accessible, and their eco-packaging is a bonus.
Dec 02, 2025
I’m impressed by how they manage to keep their inventory so well stocked at all times.
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Frequently Asked Questions (FAQ)
What are the key design-in considerations for the MCP73844T-820I/MS when charging a 2-cell lithium-ion series configuration in a high-temperature environment?
When designing the MCP73844T-820I/MS into a 2-cell (8.2V) lithium-ion series charging application, ensure proper thermal management due to its 8-MSOP package and -40°C to 85°C operating range. At elevated ambient temperatures, board layout must include adequate copper pour and thermal vias to avoid triggering thermal regulation or long-term reliability degradation. Avoid placing heat-generating components nearby, and verify actual junction temperature under full charge current using the internal thermal regulation feature as a safety net—not a normal operating condition. Additionally, confirm that input voltage remains below 12V to prevent supply overvoltage stress on the IC.
Can the MCP73844T-820I/MS replace the LTC4056-4.2 in a 1-cell Li-Polymer wearable design, and what circuit changes are required?
The MCP73844T-820I/MS is not a direct replacement for the LTC4056-4.2 in single-cell applications due to fundamental differences in programming and regulation. The MCP73844T-820I/MS is predefined for 8.2V dual-cell charging, making it incompatible with 1-cell (4.2V) stacks. Attempting to use it on a single-cell pack risks overvoltage and catastrophic failure. Select the MCP73831 or MCP73871 for single-cell Li-Ion/Polymer systems instead. Always verify cell count alignment before replacement—'pin-to-pin' compatibility does not imply functional equivalence.
How does the fixed charge voltage of the MCP73844T-820I/MS impact battery pack matching and long-term cycle life?
The MCP73844T-820I/MS has a factory-set 8.2V regulation voltage for 2-cell Li-Ion packs, requiring strict matching between the IC's voltage setpoint and the battery's actual series configuration. Mismatched packs (e.g., uneven cell aging or mixed capacity) can lead to individual cell overcharging or underutilization, accelerating degradation. To maximize cycle life, ensure tight cell voltage balance at system integration and implement stringent manufacturing screening. Consider adding external balancing or protector ICs (e.g., bare-cell protection module) to mitigate imbalance risks inherent in fixed-voltage chargers.
What are the risks of using the MCP73844T-820I/MS in a USB-powered portable device without current limiting upstream?
Using the MCP73844T-820I/MS in a USB-powered system without input current limiting risks exceeding the USB port’s current specification (e.g., 500mA for USB 2.0 or 900mA for USB 3.0), potentially tripping host protection or damaging the source. The MCP73844T-820I/MS does not include input current regulation—only charge current and timer programmability. Always pair it with a current-limited power path (e.g., via a TPS2514A or similar USB charge detection IC) to ensure compliance. Otherwise, inrush and steady-state draw may cause voltage droop, system brownouts, or unsafe thermal conditions.
How does the lack of I²C or digital interface on the MCP73844T-820I/MS affect system-level monitoring and fault recovery in embedded designs?
The MCP73844T-820I/MS lacks a digital interface (e.g., I²C or SMBus), limiting real-time state monitoring and dynamic charge parameter adjustment. System designers cannot read back charge status, fault codes, or battery health directly from the IC, relying instead on discrete status pins (e.g., CHRG, BATOK). This increases complexity in fault diagnosis and recovery logic, especially in embedded systems requiring predictive maintenance or user feedback. Designers must buffer status signals into a host MCU and implement software timers to detect charge timeouts or stalls, adding firmware overhead and reducing accuracy compared to smart chargers like the BQ25887.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
MCP73844T-820I/MS CAD Models
Microchip Technology MCP73844T-820I/MS PCB symbols & footprints
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