Details

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BUY MCP73831T-2DCI/OT https://www.utsource.net/itm/p/6367668.html
Miniature Single-Cell, Fully Integrated Li-Ion, Li-Polymer Charge Management Controllers

Parameter	Description	Value
Part Number	Device Identifier	MCP73831T-2DCI/OT
Package Type	Physical Package	8-Pin MSOP (Micro Small Outline Package)
Operating Voltage (VIN)	Input Voltage Range	4.0V to 5.5V
Battery Type	Supported Battery	Single Cell Lithium-Ion or Lithium-Polymer
Charging Current (ICHG)	Programmable Charging Current	500mA (Typical)
Charge Termination Current (ITERM)	Charge Termination Current	1/10th of ICHG
Charge Voltage (VBAT)	Battery Regulation Voltage	4.2V (Typical)
Pre-Charge Current (IPRE)	Pre-Charge Current for Deeply Discharged Batteries	1/10th of ICHG
Thermal Regulation	Thermal Regulation	Automatic Reduction of Charging Current to Prevent Overheating
Status Indicators	Charge Status Indicators	Active Low Open Drain Output (PG)
Safety Timer	Charge Safety Timer	4 Hours (Typical)
Input Undervoltage Lockout (UVLO)	Input UVLO Threshold	4.0V (Typical)
Operating Temperature Range	Operating Temperature	-40°C to +85°C
Storage Temperature Range	Storage Temperature	-65°C to +150°C
Humidity Sensitivity Level (HSL)	Humidity Sensitivity Level	Level 1 (Least Sensitive)

Instructions:

1. Power Supply Connection:

   • Connect the input voltage (V_IN) to the power supply within the specified range (4.0V to 5.5V).
   • Ensure the power supply is stable and capable of providing the required current.

2. Battery Connection:

   • Connect the battery to the V_BAT pin.
   • Ensure the battery is a single cell Lithium-Ion or Lithium-Polymer type.

3. Programming the Charging Current:

   • Set the charging current (I_CHG) by connecting an external resistor (R_PROG) between the PROG pin and ground.
   • Use the formula: I_CHG = 1000 μA × (R_PROG / 1 kΩ).

4. Charge Status Monitoring:

   • Monitor the charge status using the PG (Power Good) pin.
   • The PG pin will be low when the device is charging and high when the charge is complete.

5. Thermal Management:

   • The device automatically reduces the charging current if it detects overheating.
   • Ensure proper heat dissipation by placing the device on a heatsink or in a well-ventilated area.

6. Safety Timer:

   • The device has a built-in safety timer that terminates charging after 4 hours if the battery is not fully charged.
   • If the battery is not fully charged within this time, check the battery and connections.

7. Input UVLO:

   • The device will not start charging if the input voltage is below the UVLO threshold (4.0V).
   • Ensure the input voltage is above the threshold before attempting to charge the battery.

8. Storage and Handling:

   • Store the device in a dry, cool place within the specified storage temperature range.
   • Handle with care to avoid damage from static electricity or physical stress.

(For reference only)