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Below is the parameter table and instructions for the TOP243YN, a high-voltage power switch from Power Integrations.

TOP243YN Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit	Test Conditions
Input Voltage	VIN	100	230	265	VAC	Continuous operation
Output Voltage	VOUT	-	5	15	VDC	Continuous operation
Output Current	IOUT	-	0.3	0.5	A	Continuous operation
Power Dissipation	PD	-	1.5	2.5	W	Continuous operation
Operating Temperature	TOP	-40	25	85	°C	Storage and operation
Storage Temperature	TSTG	-65	-	150	°C	Non-operating
Junction Temperature	TJ	-	-	150	°C	Maximum
Thermal Resistance (Junction to Ambient)	RθJA	-	75	-	°C/W	Free air
Switching Frequency	fSW	-	65	-	kHz	Typical operation
Standby Power Consumption	PSTBY	-	0.1	0.3	W	No load
Isolation Voltage	VISO	-	3750	-	VAC	1 minute, 50/60 Hz
Input Capacitance	CIN	-	1000	-	pF	1 MHz
Output Capacitance	COUT	-	1000	-	pF	1 MHz

Instructions for TOP243YN

1. Design Considerations:

   • Ensure the input voltage range (100VAC to 265VAC) is compatible with your application.
   • Select appropriate output capacitors to maintain stable output voltage and current.
   • Use a heatsink if operating at high power levels to manage junction temperature.

2. Circuit Design:

   • Connect the input terminals (DRAIN and SOURCE) directly to the AC line through a suitable input filter.
   • Connect the output terminals (SOURCE and BULK) to the output capacitor and load.
   • Use a feedback resistor network to set the output voltage.
   • Ensure proper grounding and isolation to meet safety standards.

3. Thermal Management:

   • Monitor the junction temperature to ensure it does not exceed 150°C.
   • Use thermal paste and a heatsink if necessary to improve heat dissipation.
   • Place the device away from other heat sources to avoid overheating.

4. Safety and Compliance:

   • Follow all relevant safety standards and regulations.
   • Use appropriate insulation and isolation techniques to prevent electrical shock.
   • Test the final design for compliance with EMC and EMI standards.

5. Testing and Validation:

   • Perform initial testing under no-load conditions to verify basic functionality.
   • Gradually increase the load to the maximum rated output current while monitoring temperature and performance.
   • Conduct long-term reliability tests to ensure stable operation over time.

By following these parameters and instructions, you can effectively design and implement a power supply using the TOP243YN.

(For reference only)