Overview
The VIPER22AS-E, produced by STMicroelectronics, is a low power off-line SMPS (Switch-Mode Power Supply) primary switcher. This component integrates a dedicated current mode PWM (Pulse Width Modulation) controller and a high voltage power MOSFET on the same silicon chip. This integration makes it highly suitable for various off-line power supply applications, including battery charger adapters, standby power supplies for TVs or monitors, and auxiliary supplies for motor control.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Temperature | -40 | 150 | °C | |
| Switching Frequency | 54 | 60 | 66 | kHz |
| VDD Voltage Range | 9 | 38 | V | |
| Drain-Source Voltage (BVDSS) | 730 | V | ||
| Drain Current (ID) | 0.56 | 0.7 | 0.84 | A |
| Static Drain-Source Resistance (rDS(on)) | 15 | 17 | 31 | Ω |
| Package | SO-8 | |||
| RoHS Compliance | Ecopack2 |
Key Features
- Fixed 60 kHz Switching Frequency: Ensures consistent and efficient operation.
- Wide VDD Voltage Range (9 V to 38 V): Accommodates changes in auxiliary supply voltage, making it suitable for battery charger adapter configurations.
- Current Mode Control: Provides precise control over the output current.
- Auxiliary Undervoltage Lockout with Hysteresis: Prevents the device from operating under unsafe voltage conditions.
- High Voltage Start-up Current Source: Enables reliable start-up even at high voltages.
- Overtemperature, Overcurrent, and Overvoltage Protection with Auto-Restart: Ensures the device's safety and reliability by automatically restarting after a fault condition is cleared.
- Automatic Burst Mode in Low Load Condition: Reduces power consumption during low load conditions.
- Overvoltage Protection in HICCUP Mode: Protects the device from overvoltage conditions using a hiccup mode.
Applications
- Battery Charger Adapters: Suitable for charging batteries due to its wide VDD voltage range and high voltage start-up current source.
- Standby Power Supplies for TVs or Monitors: Ideal for providing power in standby modes due to its low power consumption and automatic burst mode.
- Auxiliary Supplies for Motor Control: Used in motor control applications where reliable and efficient power supply is crucial.
Q & A
- What is the VIPER22AS-E?
The VIPER22AS-E is a low power off-line SMPS primary switcher that combines a dedicated current mode PWM controller and a high voltage power MOSFET on the same silicon chip.
- What is the switching frequency of the VIPER22AS-E?
The switching frequency is fixed at 60 kHz.
- What is the VDD voltage range of the VIPER22AS-E?
The VDD voltage range is from 9 V to 38 V.
- What types of protection does the VIPER22AS-E offer?
The device offers overtemperature, overcurrent, and overvoltage protection with auto-restart.
- What is the typical power capability of the VIPER22AS-E?
The typical power capability varies by mains type, with up to 12W for European mains and up to 7W for US/wide range mains.
- What package type is the VIPER22AS-E available in?
The VIPER22AS-E is available in an SO-8 package.
- Is the VIPER22AS-E RoHS compliant?
Yes, the VIPER22AS-E is RoHS compliant with an Ecopack2 grade.
- What are the typical applications of the VIPER22AS-E?
Typical applications include battery charger adapters, standby power supplies for TVs or monitors, and auxiliary supplies for motor control.
- How does the automatic burst mode in the VIPER22AS-E work?
The automatic burst mode reduces power consumption during low load conditions by operating in a burst mode.
- What is the overvoltage protection mechanism in the VIPER22AS-E?
The device uses a hiccup mode for overvoltage protection.
