Details

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BUY LTC4054LES5-4.2 https://www.utsource.net/itm/p/9163366.html
Original stock

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Continuous	2.9	-	5.5	V
Charge Voltage	VCHG		-	4.2	-	V
Charge Current	ICHG	Programming	0.5	-	2.0	A
Battery Thermistor Input	VBAT_T	Open/Short Detect	-	-	-	V
Float Voltage Accuracy	ΔVFB	@ 25°C	-0.75	-	+0.75	%
Charge Termination Curr.	ICT		0.01	-	0.2	×ICHG
Thermal Regulation Temp.	TJ		80	-	120	°C
Operating Temperature	Toper		-40	-	85	°C

Instructions for LTC4054LES5-4.2:

1. Input Voltage Range:

   • Ensure the input voltage (VIN) is within the range of 2.9V to 5.5V to prevent damage to the device.

2. Charge Voltage Setting:

   • The charge voltage (VCHG) is set to 4.2V, which is suitable for Li-ion batteries. Do not exceed this value to avoid overcharging.

3. Charge Current Configuration:

   • Set the charge current (ICHG) using an external resistor. The maximum charge current should not exceed 2.0A.

4. Battery Thermistor Monitoring:

   • Connect a thermistor to the VBAT_T pin to monitor battery temperature and ensure safe charging conditions. This pin can detect open or short circuits in the thermistor circuit.

5. Float Voltage Accuracy:

   • The float voltage accuracy is ±0.75%. This ensures precise control over the charging voltage.

6. Charge Termination:

   • Charging terminates when the charge current drops below a fraction of the programmed charge current (ICT), typically ranging from 1% to 20%.

7. Thermal Regulation:

   • The device enters thermal regulation at temperatures between 80°C and 120°C to protect against overheating.

8. Operating Temperature:

   • Operate the device within the temperature range of -40°C to 85°C for optimal performance.

9. Safety Considerations:

   • Always follow safety guidelines to prevent risks associated with high voltages and currents. Use appropriate protective equipment when handling the device.

(For reference only)