Details

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BUY BQ24040DSQT https://www.utsource.net/itm/p/4291645.html
800mA Single-Input Single Cell Li-Ion Battery Charger With Auto Start

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VIN	Operating	3.75	-	6.0	V
Charge Current	ICHG	Programming	-	1000	2000	mA
Pre-charge Current	ITRK	Programming	-	267	533	mA
Termination Current	ITERM	Programming	-	167	333	mA
Battery Regulation Voltage	VREG	Programming	-	4.2	4.2	V
Battery Type	BTYP	Supported	-	Li-Ion	-	-
Thermal Regulation Threshold	TREG	Operating	-	110	120	掳C
Safe Timer	TSAFE	Charging	-	18	18	Hrs

Instructions for BQ24040DSQT

1. Power Supply Connection:

   • Connect the input voltage (VIN) to a power source within the operating range of 3.75V to 6.0V.

2. Battery Connection:

   • Ensure the battery connected is a Li-Ion type as specified in the parameters.

3. Charge Current Setting:

   • Program the charge current (ICHG) using external resistors according to the formula provided in the datasheet, typically between 1000mA and 2000mA.

4. Pre-Charge and Termination Currents:

   • Set pre-charge (ITRK) and termination currents (ITERM) via programming or external components as per application requirements.

5. Voltage Regulation:

   • The device automatically regulates the battery voltage to 4.2V during charging.

6. Thermal Monitoring:

   • Monitor the thermal regulation threshold (TREG) to ensure it does not exceed 120掳C to prevent overheating.

7. Safe Timer Setup:

   • A safe timer is set to 18 hours; if charging exceeds this duration, the charger will terminate the process to protect the battery.

8. System Operation:

   • Once configured, the BQ24040DSQT will manage the charging process autonomously, including transitioning from pre-charge to fast charge modes based on battery conditions.

Note: Always refer to the official datasheet for detailed specifications and application notes specific to your design requirements.

(For reference only)