Fixed frequency off line converter The VIPER12ASTR-E is a monolithic IC from STMicroelectronics, designed for offline SMPS (Switched-Mode Power Supply) applications. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Input Voltage Range:** 9V to 38V (DC)
- **Output Power:** Up to 12W (depending on configuration)
- **Operating Frequency:** 60 kHz (fixed)
- **Drain-Source Voltage (VDSS):** 730V
- **Maximum Drain Current (ID):** 0.38A
- **Standby Power Consumption:** < 1W (at 230V AC)
- **Junction Temperature Range:** -40°C to +150°C
- **Package:** SO-8
### **Descriptions:**
- The VIPER12ASTR-E integrates a PWM controller, a high-voltage power MOSFET, and protection features in a single chip.
- It is optimized for cost-effective, low-power offline converters in applications like adapters, chargers, and auxiliary power supplies.
- The device operates in current-mode control for improved transient response.
### **Features:**
- **Integrated High-Voltage MOSFET:** 730V avalanche-rugged power switch.
- **Current-Mode Control:** Ensures stable operation under varying load conditions.
- **Built-in Protections:**
- Overvoltage protection (OVP)
- Overload protection (OLP)
- Thermal shutdown
- Soft-start for reduced inrush current
- **Low Standby Power:** Compliant with energy-saving standards.
- **Auto-Restart Mode:** Recovers automatically after fault conditions.
- **Frequency Jittering:** Reduces EMI emissions.
The VIPER12ASTR-E is suitable for applications requiring compact, efficient, and reliable power conversion.
