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TOP203YAI from POWER

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TOP203YAI

Manufacturer: POWER, TOP

Three-terminal Off-line PWM Switch
Partnumber Manufacturer Quantity Availability
TOP203YAI POWER, TOP 90 In Stock

Description and Introduction

Three-terminal Off-line PWM Switch The TOP203YAI is a power IC manufactured by POWER Integrations.  

### **Specifications:**  
- **Type:** Off-line switcher IC  
- **Input Voltage Range:** 85V to 265V AC  
- **Output Power:** Up to 5W (depending on design)  
- **Switching Frequency:** 132 kHz  
- **Package:** TO-220-7C (through-hole)  
- **Efficiency:** High efficiency with integrated frequency jitter for reduced EMI  
- **Protection Features:** Overload, over-temperature, and line under-voltage protection  

### **Descriptions:**  
The TOP203YAI is a member of the TOPSwitch-II family, designed for low-power offline flyback converters. It integrates a high-voltage MOSFET, PWM controller, and thermal protection in a single package, simplifying power supply designs.  

### **Features:**  
- **Integrated MOSFET:** 700V power MOSFET  
- **Auto-Restart Protection:** For fault conditions  
- **Frequency Jittering:** Reduces EMI filtering requirements  
- **Low Standby Power Consumption:** Suitable for energy-efficient applications  
- **Wide Input Voltage Range:** Supports universal AC input  

This IC is commonly used in adapters, chargers, and auxiliary power supplies.

Application Scenarios & Design Considerations

Three-terminal Off-line PWM Switch

Alternative Part Number

  • TNY264PN --: TinySwitch-III family off-line switcher with integrated MOSFET, a common drop-in replacement for TOPSwitch devices in low-power supplies.
  • LNK304PN --: LinkSwitch-TN integrated switcher suitable for low-power non-isolated supplies, often used where TOPSwitch parts are unavailable.
  • VIPER12A --: Integrated off-line PWM switcher with built-in power MOSFET, functionally similar to TOPSwitch in small AC-DC converters.
  • TOP204YAI --: Same TOPSwitch-II family with higher power rating, pin-compatible and often used as a drop-in upgrade for TOP203YAI.
  • TOP202YAI --: Same TOPSwitch-II series with slightly lower power rating, pin-compatible and suitable for lower-power designs.
  • TOP221YN --: TOPSwitch-II three-terminal off-line switcher in a comparable package, usable as a functional substitute with minor design review.

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