Details

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BUY MC7812BTG https://www.utsource.net/itm/p/8400124.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Input Voltage	VI	Continuous operation	14.5	-	30	V
Output Voltage	VO		11.4	12	12.6	V
Output Current	IO		0	1.0	1.5	A
Line Regulation		25°C ≤ TJ ≤ 125°C	-	0.01	-	%
Load Regulation		25°C ≤ TJ ≤ 125°C	-	0.7	-	%
Dropout Voltage	VD	IO = 1A	-	2.0	-	V
Thermal Resistance	θJA	Junction to Ambient	-	65	-	°C/W
Operating Junction Temp	TJ		-40	-	125	°C
Storage Temperature	TSTG		-65	-	150	°C

Instructions for MC7812BTG

1. Power Supply Requirements:

   • Ensure the input voltage is within the specified range (14.5V to 30V) to prevent damage or improper operation.

2. Output Voltage Stability:

   • The output voltage should remain stable around 12V. Use appropriate capacitors on both input and output to minimize ripple and noise.

3. Heat Dissipation:

   • Given the thermal resistance, ensure adequate heat dissipation if operating near maximum load conditions. Consider using a heatsink if necessary.

4. Load Regulation:

   • The load regulation is typically 0.7%, indicating that the output voltage will change minimally with varying load conditions.

5. Line Regulation:

   • With line regulation at 0.01%, the output voltage remains very stable even with variations in input voltage.

6. Operating Temperature:

   • Keep the junction temperature between -40°C and 125°C for reliable operation. Avoid exceeding these limits to prevent thermal shutdown or damage.

7. Storage Conditions:

   • Store the device in an environment where temperatures do not exceed -65°C to 150°C to maintain its integrity.

8. Capacitor Selection:

   • Choose input and output capacitors based on the application requirements. Typically, electrolytic capacitors are used for bulk capacitance and ceramic capacitors for high-frequency filtering.

9. PCB Layout:

   • Optimize the PCB layout for minimal trace lengths from the input capacitor to the regulator input pin to reduce noise and improve stability.

10. Protection Circuits:

    • Implement necessary protection circuits such as reverse polarity protection, overvoltage protection, and short-circuit protection as required by the application.

(For reference only)