| Part Number | FSFR2100U | FSFR2100 | 
|---|---|---|
| Manufacturer | Fairchild Semiconductor | onsemi | 
| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers | 
|   |   | |
| Product Status | Obsolete | Active | 
| Output Isolation | Isolated | Isolated | 
| Internal Switch(s) | Yes | Yes | 
| Voltage - Breakdown | 500V | 600V | 
| Topology | Half-Bridge | Half-Bridge | 
| Voltage - Start Up | 14.5 V | 14.5 V | 
| Voltage - Supply (Vcc/Vdd) | 11.3V ~ 25V | 11.3V ~ 25V | 
| Duty Cycle | 50% | 50% | 
| Frequency - Switching | Up to 300kHz | Up to 300kHz | 
| Power (Watts) | 400 W | 450 W | 
| Fault Protection | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting, Over Load, Over Temperature, Over Voltage | 
| Control Features | EN, Frequency Control | Frequency Control | 
| Operating Temperature | -40°C ~ 130°C (TJ) | -40°C ~ 130°C (TJ) | 
| Package / Case | 10-SSIP Module, 9 Leads, Formed Leads | 10-SIP Module, 9 Leads, Formed Leads | 
| Supplier Device Package | 9-SIP | 9-SIP | 
| Mounting Type | Through Hole | Through Hole |