| Part Number | KA3844B | KA3842B | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | 
| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers | 
|   |   | |
| Product Status | Active | Obsolete | 
| Output Isolation | - | - | 
| Internal Switch(s) | No | No | 
| Voltage - Breakdown | - | - | 
| Topology | - | - | 
| Voltage - Start Up | 16 V | 16 V | 
| Voltage - Supply (Vcc/Vdd) | 12V ~ 25V | 12V ~ 25V | 
| Duty Cycle | 48% | 97% | 
| Frequency - Switching | Up to 500kHz | Up to 500kHz | 
| Power (Watts) | - | - | 
| Fault Protection | - | - | 
| Control Features | Frequency Control | Frequency Control | 
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 
| Supplier Device Package | 8-DIP | 8-DIP | 
| Mounting Type | Through Hole | Through Hole |