Overview
The MC33363ADWR2G is a high voltage switching regulator integrated circuit produced by onsemi. This device is designed to operate directly from a rectified 240 Vac line source, making it suitable for various high-voltage applications. The MC33363A features a monolithic design that includes all the necessary active high voltage power, control, and protection circuitry for implementing flyback or forward converters with a minimal number of external components.
Key Specifications
| Rating | Symbol | Value | Unit |
|---|---|---|---|
| Drain Voltage | VDS | 700 | V |
| Drain Current | IDS | 1.5 | A |
| Startup Input Voltage | Vin | 500 | V |
| Power Supply Voltage | VCC | 40 | V |
| Thermal Resistance, Junction-to-Air | RJA | 80 | °C/W |
| Thermal Resistance, Junction-to-Case | RJC | 15 | °C/W |
| Oscillator Frequency (CT = 390 pF, TJ = 25°C) | fOSC | 260 kHz | |
| Error Amplifier Voltage Feedback Input Threshold | VFB | 2.52 - 2.68 V | |
| Regulator Output Voltage | Vreg | 6.5 V |
Key Features
- On-chip 700 V, 1.5 A SENSEFET power switch
- On-chip 500 V active off-line startup FET
- Rectified 240 Vac line source operation
- Latching PWM for double pulse suppression
- Cycle-by-cycle current limiting
- Input undervoltage lockout with hysteresis
- Output overvoltage protection comparator
- Trimmed internal bandgap reference
- Internal thermal shutdown
- Pb-free device
Applications
The MC33363ADWR2G is suitable for a variety of high-voltage applications, including:
- Flyback and forward converters
- Off-line power supplies
- High-voltage DC-DC converters
- Industrial power supplies
- Aerospace and automotive systems requiring high reliability and efficiency
Q & A
- What is the maximum drain voltage of the MC33363ADWR2G?
The maximum drain voltage is 700 V.
- What is the maximum drain current of the MC33363ADWR2G?
The maximum drain current is 1.5 A.
- What is the typical oscillator frequency of the MC33363ADWR2G with CT = 390 pF?
The typical oscillator frequency is 260 kHz.
- What is the voltage feedback input threshold of the error amplifier?
The voltage feedback input threshold is between 2.52 V and 2.68 V.
- Does the MC33363ADWR2G have thermal protection?
- What is the purpose of the startup input pin?
The startup input pin connects directly to the rectified AC line voltage source and supplies internal bias and charges the VCC bypass capacitor during startup.
- What type of package is the MC33363ADWR2G available in?
The device is available in a SOIC-16WB (Pb-free) package.
- What is the function of the overvoltage protection input?
The overvoltage protection input provides runaway output voltage protection due to external component or connection failures in the control loop feedback signal path.
- Does the MC33363ADWR2G have short-circuit protection for the regulator output?
- What is the minimum external bypass capacitor required for the regulator output stability?
The minimum external bypass capacitor required is 1.0 μF.
