Details

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BUY LTC4090EDJC-5#PBF https://www.utsource.net/itm/p/12609442.html

Parameter	Description	Value
Part Number	Linear Technology (now part of Analog Devices) Battery Charger and Manager	LTC4090EDJC-5#PBF
Package Type	Package Type	DFN-12
Operating Temperature	Temperature Range	-40掳C to 85掳C
Input Voltage Range	Input Voltage	2.7V to 5.5V
Battery Charge Current	Maximum Charge Current	500mA
Battery Type	Compatible Battery Type	Single-cell Li-Ion/LiFePO4
Charging Method	Charging Method	Constant Current/Constant Voltage (CC/CV)
Battery Regulation	Battery Float Voltage	4.1V or 3.6V (depending on battery type)
Quiescent Current	Quiescent Current	<1渭A
Reverse Blocking	Reverse Battery Protection	Yes
Pin Count	Number of Pins	12
Size	Package Dimensions	3mm x 3mm

Instructions for Use:

1. Power Supply Connection:

   • Connect the input voltage to the VIN pin. Ensure the voltage is within the specified range (2.7V to 5.5V).

2. Battery Connection:

   • Connect the positive terminal of the battery to the BAT pin.
   • Connect the negative terminal of the battery to GND.

3. Setting Charge Current:

   • The charge current can be set using an external resistor connected between PROG and GND. Refer to the datasheet for specific resistor values corresponding to desired charge currents.

4. Thermal Considerations:

   • Ensure adequate heat dissipation, especially during charging, as the device operates efficiently but can generate heat depending on the input voltage and charge current.

5. Reverse Battery Protection:

   • The LTC4090 includes reverse battery protection, so no additional components are required for this function.

6. Status Indication:

   • Monitor the STAT pin for status indication. This pin can be used to indicate charging status or faults.

7. Shutdown Mode:

   • To enter shutdown mode, pull the EN pin low. In this mode, the quiescent current drops to less than 1渭A.

8. Layout Considerations:

   • Keep the layout compact with short traces, especially for high-frequency nodes like SW and BYPASS.
   • Place decoupling capacitors close to the power pins for stable operation.

Refer to the full datasheet for detailed specifications and application circuits.

(For reference only)