Overview
The STC04IE170HV is a high-voltage power switch developed by STMicroelectronics. It is designed for use in high-efficiency power conversion applications, particularly in switch-mode power supplies (SMPS) and other high-voltage systems. This component is often used in conjunction with PWM controllers like the L6565 to achieve high efficiency and reliability in various power supply designs.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage Rating | 1700 V |
| Maximum Input Voltage | Up to 850 V DC |
| Output Power | Up to 80 W |
| Output Voltage | 24 V / 3.33 A (typical) |
| Auxiliary Output Voltage | 15 V / 0.1 A |
| Switching Frequency | Minimum 50 kHz |
| Maximum Overvoltage | 200 V |
| Peak Current (Primary) | 1.6 A |
| RMS Current (Primary) | 0.65 A |
| Peak Current (Secondary) | 16 A |
| RMS Current (Secondary) | 6.5 A |
| Primary Inductance | 1.56 mH |
| Turn Ratio (Primary/Secondary) | 10 |
Key Features
- High-voltage capability up to 1700 V, making it suitable for applications requiring high DC input voltages.
- High efficiency, contributing to overall system efficiency of over 80%.
- Compatibility with PWM controllers like the L6565 for quasi-resonant mode operation.
- Zero Voltage Switching (ZVS) at minimum input voltage to reduce power losses.
- Proportional driving method to optimize performance and reduce dynamic saturation.
- High reliability and robust design for use in variable load conditions.
Applications
The STC04IE170HV is primarily used in switch-mode power supplies (SMPS), particularly in three-phase auxiliary power supplies for motor drives and welding applications. It is also suitable for other high-voltage power conversion systems where high efficiency and reliability are critical.
Q & A
- What is the maximum voltage rating of the STC04IE170HV?
The maximum voltage rating of the STC04IE170HV is 1700 V. - What is the typical output voltage and current of the STC04IE170HV in a 3-phase SMPS application?
The typical output voltage is 24 V with a current of 3.33 A. - What is the minimum switching frequency of the STC04IE170HV?
The minimum switching frequency is 50 kHz. - What is the maximum overvoltage limited by the clamping circuit in the STC04IE170HV?
The maximum overvoltage is limited to 200 V. - How does the STC04IE170HV achieve Zero Voltage Switching (ZVS)?
ZVS is achieved at the minimum input voltage (Vinmin = 250 V) to reduce power losses at turn-on. - What is the primary inductance value in a typical application of the STC04IE170HV?
The primary inductance is typically 1.56 mH. - What is the turn ratio between the primary and secondary sides in a typical application?
The turn ratio is typically 10. - What are the typical RMS currents on the primary and secondary sides?
The RMS current on the primary side is 0.65 A, and on the secondary side, it is 6.5 A. - What type of core material is recommended for the transformer in applications using the STC04IE170HV?
The recommended core material is N67 from EPCOS or equivalent. - What is the significance of the proportional driving method in the STC04IE170HV?
The proportional driving method helps in optimizing the performance by providing a base current related to the collector current, thus avoiding device over-saturation at low loads.
