Details

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BUY BD829 https://www.utsource.net/itm/p/12609588.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	VIN	4.5	-	36	V	Operating input voltage range
Output Voltage	VOUT	1.0	-	15	V	Adjustable output voltage
Output Current	IOUT	-	2.5	3.0	A	Maximum continuous output current
Quiescent Current	IQ	-	20	30	渭A	Quiescent current at no load
Dropout Voltage	VDROPOUT	-	300	500	mV	Typical dropout voltage
Switching Frequency	fSW	-	1.2	1.5	MHz	Switching frequency
Efficiency	畏	-	90	95	%	Typical efficiency
Operating Temperature	TOPR	-40	-	125	掳C	Operating temperature range
Storage Temperature	TSTG	-55	-	150	掳C	Storage temperature range
Thermal Resistance	R胃JA	-	50	70	掳C/W	Junction to ambient thermal resistance

Instructions for BD829

1. Input Connection:

   • Connect the positive terminal of the input voltage source to the VIN pin.
   • Connect the negative terminal of the input voltage source to the GND pin.

2. Output Configuration:

   • Connect the load to the VOUT pin.
   • Ensure the output voltage is set correctly using the feedback resistor network (if adjustable).

3. Feedback Resistor Network:

   • For adjustable output voltage, use the formula ( V_ = V_ left(1 + fracright) ) to determine the values of R1 and R2.
   • Connect R1 between VOUT and FB pins.
   • Connect R2 between FB and GND pins.

4. Capacitors:

   • Place an input capacitor (typically 10 渭F) between VIN and GND close to the IC to filter input noise.
   • Place an output capacitor (typically 10 渭F) between VOUT and GND to stabilize the output voltage.

5. Thermal Management:

   • Ensure adequate heat dissipation by providing a heatsink if operating at high output currents or in high ambient temperatures.
   • Monitor the junction temperature to ensure it does not exceed the maximum operating temperature.

6. Protection:

   • The BD829 includes built-in overcurrent and thermal shutdown protection.
   • Ensure the input voltage does not exceed the maximum rating to avoid damage to the IC.

7. Layout Considerations:

   • Keep the traces between the input capacitor, output capacitor, and the IC as short as possible to minimize parasitic inductance.
   • Use wide traces for power paths to reduce resistance and improve thermal performance.

8. Testing:

   • Before connecting the load, test the output voltage with a multimeter to ensure it is within the expected range.
   • Gradually increase the load to verify the stability and efficiency of the regulator.

By following these instructions, you can ensure optimal performance and reliability of the BD829 in your application.

(For reference only)