## VIPer50/SP: Overview and Technical Specifications The **VIPer50** and **VIPer50SP** are high-performance SMPS (Switched Mode Power Supply) primary switchers produced by STMicroelectronics. They belong to the VIPer (Vertical Intelligent Power) family, which integrates a dedicated PWM controller with a high-voltage Power MOSFET on the same silicon chip. ### 1. Key Internal Components The VIPer50 is essentially a "system-on-chip" for power conversion. Its internal structure consists of three main blocks: | Component | Description | | :--- | :--- | | **Power MOSFET** | A high-voltage power transistor capable of handling up to **600V** or **700V** (depending on the specific revision). | | **PWM Controller** | Manages the duty cycle of the MOSFET to regulate output voltage. | | **Protection Circuitry** | Includes thermal shutdown, overcurrent protection, and undervoltage lockout (UVLO). | --- ### 2. Technical Specifications Below are the critical electrical characteristics of the VIPer50/SP series: | Parameter | Value | | :--- | :--- | | **Drain-Source Voltage ($V_{DS}$)** | 600V to 700V | | **Max Switching Frequency** | Up to 200 kHz | | **Drain Current ($I_D$)** | 1.5A | | **Package Types** | TO-220 (VIPer50) or PowerSO-10 (VIPer50SP - Surface Mount) | | **Supply Voltage ($V_{DD}$)** | 8V to 15V | --- ### 3. Pin Configuration and Functions The VIPer50 uses a specialized pinout to handle both high-voltage switching and low-voltage control signals. ```text Pin Functions: 1. DRAIN: Connection to the internal MOSFET drain (High Voltage). 2. SOURCE: Ground connection for the power and control circuits. 3. VDD: Supply voltage for the internal control logic. 4. COMP: Input for the feedback loop (Error Amplifier). 5. OSC: Pin to set the switching frequency using an RC network. ``` --- ### 4. Core Features 1. **Current Mode Control:** Provides excellent line and load regulation and simplifies loop compensation. 2. **Adjustable Switching Frequency:** By connecting an external resistor and capacitor to the OSC pin, the user can tune the frequency to optimize efficiency or EMI. 3. **Automatic Burst Mode:** Under low-load conditions, the device enters a "burst mode" to reduce power consumption, aiding in meeting "Green Energy" standby requirements. 4. **Integrated Startup:** It features a high-voltage current source for internal startup, eliminating the need for bulky external resistors. ### 5. Common Applications * Offline Power Supplies (AC/DC converters) * Auxiliary power supplies for industrial equipment * Adapters for peripherals (printers, monitors) * Home appliance control boards