Details

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BUY UCC2891DG4 https://www.utsource.net/itm/p/12612396.html

Parameter	Symbol	Min	Typ	Max	Unit	Description
Supply Voltage	VCC	8	-	76	V	Operating range of the supply voltage
Start-Up Current	ISTR	-	100	-	渭A	Typical start-up current
Quiescent Current	IQ	-	2.5	-	mA	Quiescent current during normal operation
Control Voltage	VCONT	-	2.5	-	V	Control voltage for setting output current
Output Voltage (High)	VOH	-	14	-	V	Output high level voltage
Output Voltage (Low)	VOL	-	0.2	-	V	Output low level voltage
Maximum Duty Cycle	DMAX	-	90	-	%	Maximum duty cycle
Minimum On-Time	tonmin	-	300	-	ns	Minimum on-time
Maximum Off-Time	toffmax	-	4.2	-	渭s	Maximum off-time
Switching Frequency	fSW	-	65	-	kHz	Switching frequency

Instructions for UCC2891DG4:

1. Power Supply Connection:

   • Connect the VCC pin to a power supply within the operating range of 8V to 76V.

2. Start-Up Procedure:

   • Ensure that the start-up current is not exceeded; typically, it should be around 100渭A.

3. Control Voltage Setting:

   • Set the control voltage (VCONT) to adjust the output current as required by your application. The typical value is 2.5V.

4. Output Configuration:

   • Configure the output stage to operate with the specified high and low output voltages (VOH and VOL).

5. Duty Cycle Management:

   • Monitor the duty cycle to ensure it does not exceed 90%.

6. Timing Parameters:

   • Verify that the minimum on-time and maximum off-time are adhered to for stable operation.

7. Switching Frequency:

   • Operate the device at the recommended switching frequency of 65kHz for optimal performance.

8. Protection and Safety:

   • Implement necessary protection circuits to safeguard against overvoltage, overcurrent, and thermal issues.

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

(For reference only)