Details

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BUY BQ24090DGQT https://www.utsource.net/itm/p/5881399.html
1A, Single-Input, Single Cell Li-Ion Battery Charger

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	4.0	-	28	V
Input Current Limit	ILIM	Default setting	-	500	3000	mA
Charge Voltage	VCHG	Lithium-Ion/Polymer	-	4.2	4.2	V
Charge Current	ICHG	Programmable	100	-	1500	mA
Battery Regulation	VREG	-	-	4.2	4.2	V
Thermal Regulation	TREG	-	80	-	120	掳C
Quiescent Current	IQ	No load, suspend	-	60	70	渭A
Efficiency	畏	VIN=5V, IOUT=1A	80	-	90	%

Instructions for BQ24090DGQT

1. Power Input Configuration:

   • Connect the input power supply to the VIN and GND pins. Ensure the voltage is within the operating range of 4.0V to 28V.

2. Input Current Limit Setting:

   • The input current limit can be set using an external resistor connected between the ILIM pin and GND. Refer to the datasheet for specific resistor values corresponding to desired current limits.

3. Charge Configuration:

   • Set the charge voltage by connecting the VCHG pin to the appropriate reference voltage or leave it floating for default settings (4.2V).
   • Adjust the charge current via the PROG pin with an external resistor.

4. Thermal Considerations:

   • Place the device in an area with adequate airflow or heat dissipation to prevent overheating. Monitor the temperature to stay within the thermal regulation range.

5. Quiescent Current Management:

   • When the device is in suspend mode, ensure that the quiescent current does not exceed typical values to conserve battery life.

6. Efficiency Optimization:

   • For optimal efficiency, operate the device under conditions close to the specified efficiency range. Use recommended input voltages and output currents.

7. Safety Features:

   • Utilize built-in safety features such as over-temperature protection and short-circuit protection to safeguard against potential faults.

For detailed specifications and application circuits, refer to the official datasheet provided by the manufacturer.

(For reference only)