| Part Number | VIPER38LD | VIPER38HD | 
|---|---|---|
| Manufacturer | STMicroelectronics | STMicroelectronics | 
| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers | 
|   |   | |
| Product Status | Active | Active | 
| Output Isolation | Isolated | Isolated | 
| Internal Switch(s) | Yes | Yes | 
| Voltage - Breakdown | 800V | 800V | 
| Topology | Flyback | Flyback | 
| Voltage - Start Up | 14 V | 14 V | 
| Voltage - Supply (Vcc/Vdd) | 8.5V ~ 23.5V | 8.5V ~ 23.5V | 
| Duty Cycle | 80% | 80% | 
| Frequency - Switching | 60kHz | 115kHz | 
| Power (Watts) | 20 W | 20 W | 
| Fault Protection | Current Limiting, Over Temperature, Over Voltage, Short Circuit | Current Limiting, Over Temperature, Over Voltage, Short Circuit | 
| Control Features | - | - | 
| Operating Temperature | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | 
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 16-SO | 16-SO | 
| Mounting Type | Surface Mount | Surface Mount |