How to Use Dioda schottky: Examples, Pinouts, and Specs

The Dioda Schottky (Manufacturer: OOOT, Part ID: 90QE9Q) is a semiconductor device designed to allow current to flow in one direction with minimal forward voltage drop and high-speed switching capabilities. Its unique construction, utilizing a metal-semiconductor junction, makes it highly efficient for applications requiring low power loss and fast response times.

• Power rectification in power supplies
• High-frequency switching circuits
• Voltage clamping and protection
• RF and microwave applications
• Solar panel bypass diodes
• Low-voltage, high-efficiency DC-DC converters

• Forward Voltage Drop (Vf): 0.2V to 0.45V (typical, depending on current)
• Maximum Reverse Voltage (Vr): 90V
• Maximum Forward Current (If): 9A
• Reverse Leakage Current (Ir): ≤ 1mA at Vr = 90V
• Junction Temperature Range (Tj): -55°C to +150°C
• Switching Speed: < 10ns
• Package Type: TO-220

The Dioda Schottky (90QE9Q) is typically housed in a TO-220 package with three pins. Below is the pin configuration:

1. Polarity Matters: Ensure the anode is connected to the positive side of the circuit and the cathode to the negative side. Reversing the polarity will block current flow.
2. Heat Dissipation: The TO-220 package includes a metal tab for heat dissipation. Use a heatsink if the diode operates at high currents to prevent overheating.
3. Voltage Ratings: Do not exceed the maximum reverse voltage (90V) to avoid breakdown.
4. Current Ratings: Ensure the forward current does not exceed 9A to prevent damage.
5. Bypass Applications: In solar panels, connect the diode in parallel with the panel to prevent reverse current during low light conditions.

The Dioda Schottky can be used in an Arduino-based DC motor driver circuit to protect against back EMF. Below is an example:

• The Schottky diode is placed across the motor terminals to prevent voltage spikes from damaging the Arduino or motor driver.

// Example code for controlling a DC motor with Arduino UNO
// The Schottky diode protects against back EMF from the motor.

const int motorPin = 9; // PWM pin connected to motor driver

void setup() {
  pinMode(motorPin, OUTPUT); // Set motor pin as output
}

void loop() {
  analogWrite(motorPin, 128); // Run motor at 50% speed
  delay(5000);                // Run for 5 seconds
  analogWrite(motorPin, 0);   // Stop motor
  delay(2000);                // Wait for 2 seconds
}

• Thermal Management: Always monitor the diode's temperature during operation. Use a heatsink or thermal paste if necessary.
• Parasitic Capacitance: In high-frequency circuits, consider the diode's parasitic capacitance, as it may affect performance.
• Parallel Operation: When using multiple diodes in parallel, ensure proper current sharing by adding small resistors in series with each diode.

1. Can I use the Dioda Schottky for AC rectification?

   • Yes, but ensure the reverse voltage rating is sufficient for the peak AC voltage.

2. What makes a Schottky diode different from a regular diode?

   • Schottky diodes have a lower forward voltage drop and faster switching speeds compared to regular silicon diodes.

3. How do I test if the diode is working?

   • Use a multimeter in diode mode. Connect the positive lead to the anode and the negative lead to the cathode. A forward voltage drop of ~0.2V to 0.45V indicates a functional diode.

4. Can I use this diode in high-frequency circuits?

   • Yes, the Dioda Schottky is ideal for high-frequency applications due to its fast switching speed.

By following this documentation, you can effectively integrate the Dioda Schottky (90QE9Q) into your electronic projects for efficient and reliable performance.