Overview
The VIPER12ASTR-E, produced by STMicroelectronics, is a highly integrated power management IC that combines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip. This device is designed for low power offline switched-mode power supplies and is particularly suited for applications requiring a wide input voltage range and robust protection features.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switching Frequency | 60 kHz | - |
| VDD Voltage Range | 9 V to 38 V | V |
| Drain Current (nom) | 0.4 A | A |
| Transistor Breakdown Voltage (min) | 730 V | V |
| RDS(on) (max) | 30 Ω | Ω |
| Operating Temperature Range | -40°C to 150°C | °C |
| Package | SO-8 | - |
| Thermal Resistance Junction-Case (max) | 25 °C/W | °C/W |
| Thermal Resistance Ambient-Case (max) | 55 °C/W | °C/W |
Key Features
- Fixed 60 kHz switching frequency
- Wide VDD voltage range (9 V to 38 V)
- Current mode control
- Auxiliary undervoltage lockout with hysteresis
- High voltage start-up current source
- Overtemperature, overcurrent, and overvoltage protection with auto-restart
- Automatic burst mode in low load condition
- Overvoltage protection in HICCUP mode
Applications
The VIPER12ASTR-E is typically used in various offline power supply applications, including:
- Battery charger adapters
- Standby power supplies for TVs or monitors
- Auxiliary supplies for motor control
Q & A
- What is the switching frequency of the VIPER12ASTR-E?
The switching frequency is fixed at 60 kHz.
- What is the VDD voltage range for the VIPER12ASTR-E?
The VDD voltage range is from 9 V to 38 V.
- What type of control does the VIPER12ASTR-E use?
The device uses current mode control.
- Does the VIPER12ASTR-E have overvoltage protection?
Yes, it has overvoltage protection with auto-restart.
- What is the typical power capability of the VIPER12ASTR-E for European input voltages?
For European input voltages (195 - 265 Vac), the typical power capability is 8 W for SO-8 packages and 13 W for DIP-8 packages.
- What is the operating temperature range of the VIPER12ASTR-E?
The operating temperature range is from -40°C to 150°C.
- What type of package is the VIPER12ASTR-E available in?
The device is available in an SO-8 package.
- Does the VIPER12ASTR-E have thermal protection?
Yes, it has overtemperature protection with auto-restart.
- What is the drain current rating of the VIPER12ASTR-E?
The nominal drain current is 0.4 A.
- What is the breakdown voltage of the MOSFET in the VIPER12ASTR-E?
The minimum transistor breakdown voltage is 730 V.
