Overview
The VIPER20ASP-E is a high-performance SMPS (Switch-Mode Power Supply) primary IC developed by STMicroelectronics. This device is part of the VIPer20 series, which utilizes VIPower M0 Technology to integrate a state-of-the-art PWM circuit and an optimized high voltage Vertical Power MOSFET on the same silicon chip. The VIPER20ASP-E is designed for offline power supplies, offering a robust and efficient solution for various power conversion applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Continuous Drain-Source Voltage (VDS) | -0.3 to 700 | V |
| Maximum Current (ID) | Internally limited | A |
| Supply Voltage (VDD) | 0 to 15 | V |
| Switching Frequency | Up to 200 kHz | kHz |
| Static Drain-Source On Resistance (RDS(on)) | 18 Ω (typical) | Ω |
| Fall Time (tf) | 100 ns | ns |
| Rise Time (tr) | 50 ns | ns |
| Junction Operating Temperature (TJ) | -65 to 150 °C | °C |
| Thermal Shutdown Temperature (Ttsd) | 140 to 190 °C | °C |
Key Features
- Current Mode Control: The device uses a current mode control method with an inner current control loop and an outer loop for voltage control, ensuring excellent line regulation and stability.
- Soft Start and Shutdown Control: Features soft start and shutdown capabilities, including automatic burst mode operation in stand-by conditions to meet the German 'Blue Angel' norm (<1W total power consumption).
- Integrated Start-Up Supply: Includes an integrated high voltage current source for start-up, which is switched off during normal operation.
- Over-Temperature Protection: Provides over-temperature protection with a thermal shutdown temperature range of 140 to 190 °C.
- Transconductance Error Amplifier: Includes a transconductance error amplifier with adjustable bandwidth for the regulation loop.
- External Clock Synchronization: Allows for external clock synchronization through the OSC pin.
- Primary Peak Current Limitation: Enables primary peak current limitation using a simple external circuit).
Applications
The VIPER20ASP-E is suitable for a variety of offline power supply applications, including:
- Offline Power Supplies: Designed for offline power supplies with secondary power capabilities of up to 10W in wide range conditions and up to 20W in single range or doubler configurations).
- Primary or Secondary Regulation: Compatible with both primary and secondary regulation loops, using fewer components compared to discrete solutions).
- Stand-by Mode Operation: Ideal for applications requiring low power consumption in stand-by mode, meeting the German 'Blue Angel' norm).
Q & A
- What is the maximum drain-source voltage of the VIPER20ASP-E?
The maximum drain-source voltage (VDS) is 700 V.
- What is the typical switching frequency of the VIPER20ASP-E?
The typical switching frequency is up to 200 kHz.
- Does the VIPER20ASP-E have over-temperature protection?
- How does the soft start feature work in the VIPER20ASP-E?
The soft start feature can be implemented using a simple capacitor connected to the COMP pin, which also serves as the compensation network.
- Can the VIPER20ASP-E be synchronized with an external clock?
- What is the purpose of the transconductance error amplifier in the VIPER20ASP-E?
The transconductance error amplifier provides adjustable bandwidth for the regulation loop and is used for voltage control.
- How does the VIPER20ASP-E handle stand-by mode operation?
The device operates in burst mode during stand-by conditions, meeting the German 'Blue Angel' norm with less than 1W total power consumption.
- What is the maximum junction operating temperature of the VIPER20ASP-E?
The maximum junction operating temperature (TJ) is 125 °C.
- Can the primary peak current be limited in the VIPER20ASP-E?
- What is the typical static drain-source on resistance (RDS(on)) of the VIPER20ASP-E?
The typical static drain-source on resistance (RDS(on)) is 18 Ω.
