Details

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BUY TK83854 https://www.utsource.net/itm/p/12609468.html

Parameter	Description	Value
Part Number	TK83854
Type	Integrated Circuit (IC)
Function	High-Efficiency Step-Up DC-DC Converter
Input Voltage	Range of input voltage	2.7V to 5.5V
Output Voltage	Adjustable output voltage	5V to 12V
Output Current	Maximum continuous output current	3A
Switching Frequency	Fixed switching frequency	600kHz
Efficiency	Typical efficiency at full load	Up to 92%
Package	Type of package	SOP-8
Operating Temperature	Range of operating temperature	-40掳C to 85掳C
Protection Features	Overcurrent protection, thermal shutdown, short-circuit protection	Included

Instructions for Use

1. Power Supply Connection:

   • Connect the input power supply to the VIN and GND pins.
   • Ensure the input voltage is within the specified range (2.7V to 5.5V).

2. Output Configuration:

   • Set the desired output voltage using the feedback resistor network connected to the FB pin.
   • The output voltage can be calculated using the formula: ( V_ = 1.23 times left(1 + fracright) ), where R1 and R2 are the resistors in the feedback network.

3. Inductor Selection:

   • Choose an inductor with a value that matches the switching frequency and output current requirements.
   • A typical inductor value is 4.7渭H to 10渭H.

4. Capacitor Selection:

   • Use ceramic capacitors for input and output filtering.
   • Input capacitance: 10渭F to 22渭F.
   • Output capacitance: 22渭F to 47渭F.

5. PCB Layout:

   • Place the input and output capacitors as close as possible to the IC to minimize parasitic inductance.
   • Ensure proper thermal management by providing adequate copper area for heat dissipation.

6. Testing:

   • After assembly, test the circuit under no-load and full-load conditions to ensure stable operation and correct output voltage.
   • Monitor the temperature of the IC to ensure it does not exceed the maximum operating temperature.

7. Protection:

   • The IC includes overcurrent protection, thermal shutdown, and short-circuit protection. These features will automatically shut down the converter if any fault condition is detected.

8. Storage:

   • Store the IC in a dry, cool place to prevent damage from moisture and static electricity.

(For reference only)