| Parameters | 
                                
                                                                                                            
                                            | Factory Lead Time | 
                                            6 Weeks | 
                                        
                                                                            
                                            | Mounting Type | 
                                            Through Hole | 
                                        
                                                                            
                                            | Package / Case | 
                                            7-SSIP, 6 Leads, Exposed Pad, Formed Leads | 
                                        
                                                                            
                                            | Surface Mount | 
                                            NO | 
                                        
                                                                            
                                            | Number of Pins | 
                                            6 | 
                                        
                                                                            
                                            | Operating Temperature | 
                                            -40°C~150°C TJ | 
                                        
                                                                            
                                            | Packaging | 
                                            Tube | 
                                        
                                                                            
                                            | Published | 
                                            2003 | 
                                        
                                                                            
                                            | Series | 
                                            TOPSwitch®-HX | 
                                        
                                                                            
                                            | Part Status | 
                                            Active | 
                                        
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 
                                            1  (Unlimited) | 
                                        
                                                                            
                                            | Number of Terminations | 
                                            6 | 
                                        
                                                                            
                                            | Terminal Finish | 
                                            Pure Matte Tin (Sn) | 
                                        
                                                                            
                                            | HTS Code | 
                                            8542.39.00.01 | 
                                        
                                                                            
                                            | Subcategory | 
                                            Switching Regulator or Controllers | 
                                        
                                                                            
                                            | Max Power Dissipation | 
                                            105W | 
                                        
                                                                            
                                            | Technology | 
                                            CMOS | 
                                        
                                                                            
                                            | Analog IC - Other Type | 
                                            ANALOG CIRCUIT | 
                                        
                                                                            
                                            | Topology | 
                                            Flyback | 
                                        
                                                                            
                                            | Control Mode | 
                                            VOLTAGE-MODE | 
                                        
                                                                            
                                            | Frequency - Switching | 
                                            66kHz 132kHz | 
                                        
                                                                            
                                            | Internal Switch(s) | 
                                            Yes | 
                                        
                                                                            
                                            | Fault Protection | 
                                            Current Limiting, Over Temperature, Over Voltage | 
                                        
                                                                            
                                            | Duty Cycle | 
                                            78% | 
                                        
                                                                            
                                            | Output Isolation | 
                                            Isolated | 
                                        
                                                                            
                                            | Voltage - Breakdown | 
                                            700V | 
                                        
                                                                            
                                            | Radiation Hardening | 
                                            No | 
                                        
                                                                            
                                            | RoHS Status | 
                                            RoHS Compliant | 
                                        
                                                                                                    
                            
                         
                                                TOP257LN Overview
In the 7-SSIP, 6 Leads, Exposed Pad, Formed Leads package, the ac to dc converter is embedded.The AC/DC power converter Tube is available for this product.Through Hole mounts this AC/DC converter.For the ac dc converter to perform properly, it should be operated at a temperature of -40°C~150°C TJ °C.A ANALOG CIRCUIT analog integrated circuit is used in this AC DC converter.In this AC to DC transformer, the switching frequency is 66kHz 132kHz .There are a total of 6  terminations.The ac/dc converter has 6 pins.It belongs to the family of TOPSwitch?-HX manufacturers.The ac to dc conversions are included in Switching Regulator or Controllers .
TOP257LN Features
Packaged with 7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Switching Frequency at 66kHz 132kHz
With 6 pins
TOP257LN Applications
There are a lot of Power Integrations TOP257LN AC DC Converters applications. 
- White goods
 - MP3
 - RCC SMPS
 - Replacements for bulky plug-in transformers
 - Standby and Auxiliary Power Supplies 
 - Switching AC-DC Adapter
 - Linear Adapter Replacements
 - Air Conditioning
 - Power tools
 - Standby power supplies for VCR