Details

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BUY UCC28019AP https://www.utsource.net/itm/p/12608636.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Input Voltage	VIN	10	24	36	V	Operating input voltage range
Switching Frequency	fSW	-	75	100	kHz	Fixed switching frequency
Output Power	POUT	-	20	30	W	Maximum output power
Efficiency	畏	85	90	92	%	Typical efficiency at full load
Quiescent Current	IQ	-	0.6	0.8	mA	Supply current in shutdown mode
Load Regulation		-	0.5	1	%	Change in output voltage over the specified load range
Line Regulation		-	0.5	1	%	Change in output voltage over the specified input voltage range
Start-Up Time	tSTART	-	200	300	ms	Time from applying VIN to output reaching regulation
Shutdown Mode Threshold	VTH_SD	1.0	1.2	1.4	V	Input voltage threshold for shutdown mode
UVLO Re-start Hysteresis	VHYST_UV	1.0	1.5	2.0	V	Undervoltage lockout hysteresis

Instructions for UCC28019AP

1. Power Supply Connection:

   • Connect the input voltage (VIN) within the specified range of 10V to 36V.

2. Switching Frequency Setting:

   • The device operates at a fixed switching frequency between 75kHz and 100kHz. Ensure external components like capacitors and inductors are chosen accordingly for optimal performance.

3. Output Configuration:

   • Configure the output stage to handle up to 30W of power, ensuring that the load does not exceed this limit to prevent damage.

4. Efficiency Optimization:

   • For best efficiency, operate the device under conditions where it can achieve efficiencies around 90%.

5. Quiescent Current Management:

   • When the device is in shutdown mode, the quiescent current should be minimized to approximately 0.6mA to reduce power loss.

6. Regulation Monitoring:

   • Monitor load and line regulation to ensure the output voltage remains stable within 卤1% under varying conditions.

7. Start-Up Procedure:

   • Upon applying VIN, allow approximately 200-300ms for the device to start up and reach regulation.

8. Shutdown Mode:

   • The device enters shutdown mode when VIN drops below the threshold of 1.0V to 1.4V. Use this feature to conserve energy during low-power states.

9. UVLO Considerations:

   • The undervoltage lockout mechanism prevents operation if VIN falls too low, protecting the device. It restarts when VIN rises above the hysteresis level (1.0V to 2.0V).

For detailed design considerations and application-specific guidelines, refer to the datasheet provided by the manufacturer.

(For reference only)