Description
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°C to 85°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 |
<1μA |
| Reverse Blocking |
Reverse Battery Protection |
Yes |
| Pin Count |
Number of Pins |
12 |
| Size |
Package Dimensions |
3mm x 3mm |
Instructions for Use:
Power Supply Connection:
- Connect the input voltage to the VIN pin. Ensure the voltage is within the specified range (2.7V to 5.5V).
Battery Connection:
- Connect the positive terminal of the battery to the BAT pin.
- Connect the negative terminal of the battery to GND.
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.
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.
Reverse Battery Protection:
- The LTC4090 includes reverse battery protection, so no additional components are required for this function.
Status Indication:
- Monitor the STAT pin for status indication. This pin can be used to indicate charging status or faults.
Shutdown Mode:
- To enter shutdown mode, pull the EN pin low. In this mode, the quiescent current drops to less than 1μA.
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)
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