Below is the parameter table and instructions for the UCC3570D, a high-voltage current-mode PWM controller.

UCC3570D Parameter Table

UCC3570D Instructions

1. Supply Voltage (Vcc):

   • The UCC3570D operates with a supply voltage range from 12V to 30V. Ensure the supply voltage is within this range to avoid damage to the device.

2. Start-Up Current (Icc(start)):

   • The start-up current is typically 1.0mA at 12V. This is the current drawn by the device during the initial power-up phase.

3. Operating Current (Icc(op)):

   • The operating current is typically 2.5mA at 12V and a switching frequency of 100kHz. This is the current drawn by the device during normal operation.

4. Maximum Output Current (Iout(max)):

   • The maximum output current is 1.0A at 12V with a load resistance of 1Ω. Ensure that the load does not exceed this limit to prevent damage.

5. Minimum On-Time (ton(min)):

   • The minimum on-time is 450ns at 12V and a switching frequency of 100kHz. This is the shortest time the output can remain high.

6. Maximum Duty Cycle (D(max)):

   • The maximum duty cycle is 95% at 12V and a switching frequency of 100kHz. This is the maximum percentage of the switching period that the output can be high.

7. Oscillator Frequency (fsw):

   • The switching frequency can be set between 100kHz and 1000kHz using an external resistor (Rf) ranging from 10kΩ to 100kΩ. Calculate the resistor value based on the desired frequency.

8. Current Limit Threshold (ILIM):

   • The current limit threshold is 0.5V at 12V and a switching frequency of 100kHz. This is the voltage level at which the current limit circuit will activate to protect the device.

9. Shutdown Input Voltage (Vshut):

   • The shutdown input voltage is 1.2V. When the voltage at the shutdown pin exceeds this threshold, the device will enter a low-power shutdown mode.

10. Thermal Shutdown Temperature (Tshut):

    • The thermal shutdown temperature is 160°C. If the device temperature exceeds this value, it will automatically shut down to prevent damage.

11. Operating Temperature Range (Toper):

    • The operating temperature range is -40°C to 125°C. Ensure the device operates within this temperature range to maintain reliable performance.

12. Storage Temperature Range (Tstg):

    • The storage temperature range is -65°C to 150°C. Store the device within this temperature range to prevent damage.

Additional Notes:

• Always refer to the datasheet for detailed information and specific application notes.
• Ensure proper heat sinking if operating at high temperatures or under high load conditions.
• Use appropriate decoupling capacitors to stabilize the supply voltage and reduce noise.

If you have any specific questions or need further assistance, feel free to ask!