Details

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BUY onsemi UC3842BD1R2G https://www.utsource.net/itm/p/12606747.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	Vcc	Operating	16		40	V
		Start-up	12			V
Operating Temperature	Topr	Junction	-40		150	掳C
Switching Frequency	fsw	Typical		100	500	kHz
Current Limit	ILIM		1.2		2.7	A
Error Amplifier Transconductance	gme		300			渭S
Slope Compensation	SCOMP			100		mV/渭s
Reference Voltage	Vref		2.5			V
Maximum Duty Cycle	Dmax			50		%

Instructions for Use:

1. Power Supply Considerations:

   • Ensure the supply voltage (Vcc) is within the operating range of 16V to 40V.
   • For start-up, the supply voltage should be at least 12V.

2. Temperature Management:

   • Operate the device within the junction temperature range of -40掳C to 150掳C to avoid thermal damage.

3. Frequency Setting:

   • Set the switching frequency between 100kHz and 500kHz as per application requirements.

4. Current Limit Adjustment:

   • Adjust the current limit between 1.2A and 2.7A using external components to prevent overcurrent conditions.

5. Error Amplifier Usage:

   • Utilize the error amplifier transconductance (gme) of 300 渭S for feedback loop stability.

6. Slope Compensation:

   • Apply slope compensation of approximately 100 mV/渭s to stabilize the control loop under varying load conditions.

7. Reference Voltage:

   • Use the internal reference voltage of 2.5V for setting up the feedback network.

8. Duty Cycle Control:

   • Maintain the duty cycle below 50% to ensure stable operation and prevent saturation issues in the power stage.

For detailed design considerations and specific application circuits, refer to the datasheet provided by onsemi.

(For reference only)