| Parameters | 
                                                                                                            
                                            | Factory Lead Time | 12 Weeks | 
                                                                            
                                            | Mounting Type | Surface Mount | 
                                                                            
                                            | Package / Case | 10-SOP (0.154, 3.90mm Width) | 
                                                                            
                                            | Operating Temperature | -40°C~150°C TJ | 
                                                                            
                                            | Packaging | Tape & Reel (TR) | 
                                                                            
                                            | Part Status | Active | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 3  (168 Hours) | 
                                                                            
                                            | Power (Watts) | 11W | 
                                                                            
                                            | Reach Compliance Code | compliant | 
                                                                            
                                            | Analog IC - Other Type | SWITCHING CONTROLLER | 
                                                                            
                                            | Voltage - Supply (Vcc/Vdd) | 11.5V~23.5V | 
                                                                            
                                            | Topology | Buck, Buck-Boost, Flyback | 
                                                                            
                                            | Frequency - Switching | 60kHz | 
                                                                            
                                            | Internal Switch(s) | Yes | 
                                                                            
                                            | Fault Protection | Current Limiting, Short Circuit | 
                                                                            
                                            | Duty Cycle | 80% | 
                                                                            
                                            | Output Isolation | Either | 
                                                                            
                                            | Voltage - Breakdown | 730V | 
                                                                            
                                            | Voltage - Start Up | 13V | 
                                                                                                    
                            
                         
                                                VIPER122LSTR Overview
The ac to dc converter is embedded in 10-SOP (0.154, 3.90mm Width)  package.Tape & Reel (TR) case is available for the ac dc converter.Surface Mount is mounted in the way of this AC/DC converter.For the ac dc converter to perform at its best, it should be operated at a temperature of -40°C~150°C TJ °C.This AC DC converter employs SWITCHING CONTROLLER  analog IC type.60kHz is the switching frequency.Within the range of 11.5V~23.5V supply voltage (Vcc/Vdd), it can be used.
VIPER122LSTR Features
Packaged with 10-SOP (0.154, 3.90mm Width)
Switching Frequency at 60kHz
VIPER122LSTR Applications
There are a lot of STMicroelectronics VIPER122LSTR AC DC Converters applications. 
- Tablets
- MPS parts
- Standby Power for General Off-Line Applications 
- SMPS house keeping power supplies
- Consumer electronics
- Standby power
- Power tools fast chargers with trickle and on/off
- AC/DC Adaptors/Chargers for PDAs
- Standby power supplies for IR
- Standby Power Supplies