Overview
The STMicroelectronics VIPER22ASTR-E is a low-power off-line SMPS (Switch-Mode Power Supply) primary switcher integrated circuit. It combines a dedicated current mode PWM (Pulse Width Modulation) controller with a high voltage power MOSFET on the same silicon chip. This device is designed for use in various AC/DC converter applications, offering a wide range of input voltages and robust protection features.
Key Specifications
| Attribute | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Controller Type | Current Mode Controller |
| Topology | Flyback |
| Start-Up Voltage | 14.5V |
| Supply Voltage | 9V to 38V |
| Supply Current | 4.5mA (Typical) |
| Maximum Switching Frequency | 66 kHz |
| Rated Power | 7W |
| Operating Temperature Range | -40°C to +150°C |
| Storage Temperature Range | -55°C to +150°C |
| Package Style | SOIC-8 / DIP-8 |
| Mounting Type | Surface Mount |
| Pin Count | 8 |
| Isolation | Isolated |
| Internal Switch | Yes |
| Breakdown Voltage-Max | 730V |
Key Features
- Dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip.
- Wide input voltage range: 9V to 38V.
- Fixed 66 kHz switching frequency.
- Robust protection features including overtemperature, overcurrent, and overvoltage protection with auto-restart.
- Auxiliary undervoltage lockout with hysteresis.
- Automatic burst mode in low load conditions.
- High voltage start-up current source suitable for battery charger adapters and standby power supplies.
Applications
- Off-line power supplies for various devices such as TVs, monitors, and other consumer electronics.
- Battery charger adapters.
- Standby power supplies.
- Auxiliary supplies for motor control and other high voltage applications.
- European and US mains type configurations (85-265 Vac).
Q & A
- What is the VIPER22ASTR-E used for?
The VIPER22ASTR-E is used in low-power off-line SMPS applications, such as AC/DC converters, battery charger adapters, and standby power supplies.
- What is the switching frequency of the VIPER22ASTR-E?
The switching frequency is fixed at 66 kHz.
- What are the protection features of the VIPER22ASTR-E?
The device includes overtemperature, overcurrent, and overvoltage protection with auto-restart.
- What is the operating temperature range of the VIPER22ASTR-E?
The operating temperature range is -40°C to +150°C.
- What package styles are available for the VIPER22ASTR-E?
The device is available in SOIC-8 and DIP-8 package styles.
- What is the maximum breakdown voltage of the VIPER22ASTR-E?
The maximum breakdown voltage is 730V.
- Does the VIPER22ASTR-E have an internal switch?
Yes, it has an internal switch.
- What is the rated power of the VIPER22ASTR-E?
The rated power is 7W.
- Is the VIPER22ASTR-E RoHS compliant?
Yes, the VIPER22ASTR-E is RoHS compliant.
- What is the start-up voltage for the VIPER22ASTR-E?
The start-up voltage is 14.5V.
