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MCP73855T-I/MF
Microchip Technology
IC BATT CONTRL LI-ION 1CEL 10DFN
16944 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 10-DFN (3x3)
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5.0 / 5.0
- (50 Ratings)
MCP73855T-I/MF
Product Overview
1361372
DiGi Electronics Part Number
MCP73855T-I/MF-DGManufacturer
Microchip Technology
MCP73855T-I/MF
Description
IC BATT CONTRL LI-ION 1CEL 10DFNInventory
16944 Pcs New Original In Stock
Charger IC Lithium Ion/Polymer 10-DFN (3x3)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
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MCP73855T-I/MF 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
Current - Charging
Constant - Programmable
Programmable Features
Timer
Fault Protection
-
Charge Current - Max
475mA
Battery Pack Voltage
4.2V
Voltage - Supply (Max)
5.5V
Interface
-
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
10-VFDFN Exposed Pad
Supplier Device Package
10-DFN (3x3)
Base Product Number
MCP73855
Datasheet & Documents
Manuals
Development Tools Catalog
HTML Datasheet
MCP73855T-I/MF-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
MCP73855T-I/MFDKR
MCP73855T-I/MFRTR
MCP73855T-I/MFTR-NDR
MCP73855T-I/MFCT-NDR
MCP73855T-I/MFCT
MCP73855T-I/MF-DG
MCP73855T-I/MFRTR-DG
MCP73855T-I/MFRCT
MCP73855T-I/MFTR
MCP73855T-I/MFRCT-DG
MCP73855TIMF
Standard Package
3,300
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
항상 가격이 부담 없고, 친환경 포장까지 신경 써주는 모습이 마음에 들어요.
Dec 02, 2025
The team was proactive in following up on my purchase and ensuring I was satisfied.
Dec 02, 2025
DiGi's team provides prompt responses and genuine care, making shopping a pleasant experience.
Dec 02, 2025
The cost advantages are a huge plus for my remote work lifestyle.
Dec 02, 2025
Their honest pricing practices and reliable products make shopping enjoyable.
Dec 02, 2025
The company's support team is friendly and solutions-oriented.
Dec 02, 2025
Super fast shipping and courteous support made my shopping experience delightful.
Dec 02, 2025
The efficiency of DiGi Electronics' delivery process never ceases to amaze me.
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Frequently Asked Questions (FAQ)
How does the MCP73855T-I/MF handle thermal stress during high-current charging in compact designs, and what PCB layout practices should I follow to avoid overheating issues?
The MCP73855T-I/MF dissipates heat during constant-current charging, especially when charging near its 475mA maximum in small 10-DFN (3x3) packages. In thermally constrained layouts, inadequate copper pour can cause premature thermal shutdown or reduced charge cycle reliability. To mitigate this, use at least 1in² of copper connected to the exposed pad for thermal dissipation. Avoid placing thermal vias under the pad without proper plugging to prevent solder wicking. Also, minimize trace length between the IC, battery, and input source to reduce parasitic resistance. For continuous high-current applications, validate thermal performance at max ambient temperature (85°C) with actual load conditions to ensure stable operation without triggering thermal regulation prematurely.
Can the MCP73855T-I/MF safely replace the TP4056 in a 1S Li-ion charging circuit, and what are the key design differences I need to address?
Yes, the MCP73855T-I/MF can replace the TP4056 in 1S Li-ion applications, but with critical design adjustments. Unlike the TP4056, which uses a fixed 1.2kΩ resistor for charge current setting, the MCP73855T-I/MF requires careful selection of the ISET resistor to program current up to 475mA. Additionally, the MCP73855T-I/MF has tighter tolerance on charge voltage (4.2V ±1%) versus TP4056 (±1.5%), improving battery longevity. However, TP4056 includes automatic recharge while MCP73855T-I/MF does not—it relies on external circuitry or host microcontroller intervention. Also, the DFN package demands strict reflow profiles; use IPC-7351-compliant footprints to avoid tombstoning during assembly.
What are the risks of using the MCP73855T-I/MF with a non-stable input supply (e.g., USB port with voltage droop), and how can I ensure reliable charging initiation?
The MCP73855T-I/MF requires a stable input voltage up to 5.5V for reliable startup. In systems powered by marginal USB ports or long cables that exhibit voltage droop below 4.5V under load, the IC may fail to initiate charging or enter intermittent fault states. To ensure robust operation, place a 10μF X7R ceramic capacitor as close as possible to the VIN pin to handle transient surges. If your source is unstable, consider adding a power-path management IC like the MCP73831/2, or use a low-dropout regulator to stabilize the supply before the charger. Test startup behavior with worst-case input conditions—especially at cold temperatures where battery impedance increases.
How do I accurately program the charge current on the MCP73855T-I/MF, and what tolerance errors should I expect in production?
Charge current on the MCP73855T-I/MF is programmed via an external resistor (RSET) connected from ISET to GND, where ICHRG ≈ 1000 × VPROG / RSET (with VPROG typically 1V). Use precision 1% tolerance metal-film resistors to minimize variation. In high-volume production, resistor tolerance, PCB leakage, and supply ripple can combine to cause up to ±8% charge current deviation. For applications requiring tight control—especially medical or industrial—calibrate RSET empirically or include test points for post-assembly verification. Avoid placing RSET near heat sources to prevent drift, and ensure the ISET node isn’t exposed to EMI from switching nodes, which can modulate charging behavior.
What are the long-term reliability risks of the MCP73855T-I/MF in outdoor or industrial environments, and how does its -40°C to 85°C rating impact battery charging performance?
While the MCP73855T-I/MF is rated for -40°C to 85°C operation, charging Li-ion batteries below 0°C risks lithium plating and permanent damage. The IC lacks built-in cold-temperature charging lockout, so relying solely on its operating range is unsafe. Always integrate a thermistor (e.g., NTC) with a microcontroller to disable charging when battery temperature is out of safe range, even if the MCP73855T-I/MF remains functional. In industrial use, ensure conformal coating protects against condensation and contaminants, especially on the exposed pad. Validate performance at temperature extremes with actual battery loads—thermal coupling between IC and battery should be avoided to prevent false temperature readings.
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.
MCP73855T-I/MF CAD Models
Microchip Technology MCP73855T-I/MF PCB symbols & footprints
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