Details

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BUY BQ24172RGYR https://www.utsource.net/itm/p/5435885.html
1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage Range	VIN	-	3.9	-	32	V
Output Voltage	VOUT	-	-	4.2	-	V
Charging Current	ICHG	-	0	500	1000	mA
Pre-charge Current	IPRE	-	0	125	250	mA
Battery Voltage Detection	VBDET	-	2.8	-	3.0	V
Battery Temperature Sense	TSENSE	-	-40	-	85	掳C
Thermal Regulation	TREG	-	-	120	-	掳C
Quiescent Current	IQ	No Load	-	20	-	渭A
Shutdown Current	ISD	-	-	1	-	渭A

Instructions for Using BQ24172RGYR

1. Input Voltage Range:

   • Ensure the input voltage is within the range of 3.9V to 32V. Exceeding this range can damage the device.

2. Output Voltage:

   • The output voltage is set to 4.2V by default, suitable for charging single-cell Li-ion batteries.

3. Charging Current:

   • Set the charging current using an external resistor. The typical value is 500mA, with a maximum of 1000mA.

4. Pre-charge Current:

   • The pre-charge current is typically 125mA, with a maximum of 250mA. This is used for trickle charging deeply discharged batteries.

5. Battery Voltage Detection:

   • The battery voltage detection threshold is between 2.8V and 3.0V. This helps in determining whether the battery is deeply discharged and requires pre-charging.

6. Battery Temperature Sense:

   • Monitor the battery temperature to ensure it stays within the safe operating range of -40掳C to 85掳C.

7. Thermal Regulation:

   • The device will reduce the charging current if the internal temperature exceeds 120掳C to prevent overheating.

8. Quiescent Current:

   • The quiescent current is typically 20渭A when no load is present, ensuring low power consumption during standby.

9. Shutdown Current:

   • The shutdown current is typically 1渭A, which helps in minimizing power loss when the device is not in use.

10. Installation and Layout:

    • Place the BQ24172RGYR close to the battery and input power source to minimize trace lengths and reduce noise.
    • Use proper bypass capacitors as recommended in the datasheet to ensure stable operation.

11. Programming and Configuration:

    • If the device supports external programming, refer to the datasheet for specific resistor values and pin configurations to set the desired parameters.

12. Safety Considerations:

    • Always use appropriate fuses and protection circuits to safeguard against overvoltage, overcurrent, and short-circuit conditions.

13. Testing and Validation:

    • Test the charging circuit under various conditions to ensure reliable operation and compliance with safety standards.

For detailed specifications and additional information, refer to the BQ24172RGYR datasheet provided by Texas Instruments.

(For reference only)