Details

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BUY UCC2805DTR https://www.utsource.net/itm/p/12612005.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	8.5	-	36	V
Start-Up Current	Icc(start)	-	150	-	渭A
Operating Current	Icc(op)	-	2.5	-	mA
Maximum Duty Cycle	Dmax	-	0.9	-	-
Minimum On-Time	ton(min)	-	1.8	-	渭s
Maximum Off-Time	toff(max)	-	14	-	渭s
Frequency Range	fsw	30	100	300	kHz
Output Voltage (High)	Vo(High)	-	Vcc-2	-	V
Output Voltage (Low)	Vo(Low)	-	0	-	V
Output Current (Sink)	Io(sink)	-	100	-	mA
Output Current (Source)	Io(source)	-	50	-	mA
Thermal Shutdown Temperature	TSD	150	-	-	掳C

Instructions for Using UCC2805DTR

1. Power Supply:

   • Ensure the supply voltage (Vcc) is within the specified range of 8.5V to 36V.
   • The start-up current should not exceed 150 渭A, and the operating current should be around 2.5 mA.

2. Frequency and Duty Cycle:

   • Set the switching frequency (fsw) between 30 kHz and 300 kHz.
   • The maximum duty cycle (Dmax) is typically 0.9.

3. Timing Parameters:

   • The minimum on-time (ton(min)) is 1.8 渭s.
   • The maximum off-time (toff(max)) is 14 渭s.

4. Output Characteristics:

   • The output voltage (Vo) will be high at Vcc-2V and low at 0V.
   • The output can sink up to 100 mA and source up to 50 mA.

5. Thermal Management:

   • Monitor the thermal shutdown temperature (TSD), which is set at 150掳C to prevent damage from overheating.

6. Circuit Design:

   • Use appropriate external components such as resistors and capacitors to set the desired operating parameters.
   • Ensure proper PCB layout to minimize noise and interference.

7. Protection:

   • Implement overcurrent protection and thermal shutdown mechanisms to safeguard the device.

8. Testing:

   • Test the circuit under various conditions to ensure stable operation and compliance with specifications.

(For reference only)