Details

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BUY BQ24740RHDR https://www.utsource.net/itm/p/1883907.html
Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect

Parameter	Symbol	Test Conditions	Min	Typ	Max	Unit
Input Voltage Range	VIN	-	4.5	-	28	V
Maximum Input Current	IIN(MAX)	VIN = 12V	-	3.0	-	A
Output Voltage (Battery Charge)	VBAT	CC Mode	3.0	-	4.9	V
Charging Current	ICC	-	0.1	-	3.0	A
Pre-charge Current	ITRK	-	0.1	-	0.3	A
Termination Current	ITERM	-	0.01	-	0.03	A
Thermal Regulation Threshold	TREG	-	-	125	-	掳C
Efficiency (Typical)	畏	VIN = 12V, VBAT = 4.2V, ICC = 1A	-	90	-	%
Operating Temperature Range	TOPR	-	-40	-	85	掳C
Storage Temperature Range	TSTG	-	-65	-	150	掳C

Instructions for Using BQ24740RHDR

1. Power Supply Connection:

   • Connect the input power supply to the VIN pin.
   • Ensure the input voltage is within the specified range (4.5V to 28V).

2. Battery Connection:

   • Connect the battery to the BATT pin.
   • Verify that the battery voltage is within the supported range (3.0V to 4.9V).

3. Setting Charging Parameters:

   • Use external resistors or control pins to set the charging current (ICC) and termination current (ITERM).
   • For pre-charge current (ITRK), use the appropriate resistor values or control settings.

4. Thermal Management:

   • Monitor the device temperature to ensure it does not exceed the thermal regulation threshold (125掳C).
   • If the device temperature exceeds this threshold, the charging process will be reduced or halted to prevent damage.

5. Efficiency Considerations:

   • The efficiency of the charger is typically around 90% under standard operating conditions (VIN = 12V, VBAT = 4.2V, ICC = 1A).
   • Optimize the input voltage and current to achieve the best efficiency.

6. Operating and Storage Temperature:

   • Ensure the device operates within the specified temperature range (-40掳C to 85掳C).
   • Store the device in a temperature-controlled environment (-65掳C to 150掳C).

7. Protection Features:

   • The device includes overvoltage, overcurrent, and short-circuit protection.
   • Ensure all connections are secure to avoid triggering these protection features.

8. Programming and Configuration:

   • Use the I2C interface to configure advanced parameters and monitor the charging status.
   • Refer to the datasheet for specific I2C commands and register settings.

9. Safety Precautions:

   • Always follow safety guidelines when handling high-voltage circuits.
   • Do not exceed the maximum ratings for any parameter to avoid damaging the device.

10. Troubleshooting:

    • If the device fails to charge, check the input voltage, battery connection, and charging parameters.
    • Refer to the datasheet for detailed troubleshooting steps and diagnostic codes.

(For reference only)