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| Part Number | FSDH321 | FSDL321 | FSDH321L | FSDH321Z |
|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | onsemi | onsemi |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete |
| Output Isolation | Isolated | Isolated | Isolated | Isolated |
| Internal Switch(s) | Yes | Yes | Yes | Yes |
| Voltage - Breakdown | 650V | 650V | 650V | 650V |
| Topology | Flyback | Flyback | Flyback | Flyback |
| Voltage - Start Up | 12 V | 12 V | 12 V | 12 V |
| Voltage - Supply (Vcc/Vdd) | 8V ~ 20V | 8V ~ 20V | 8V ~ 20V | 8V ~ 20V |
| Duty Cycle | 67% | 77% | 67% | 67% |
| Frequency - Switching | 100kHz | 50kHz | 100kHz | 100kHz |
| Power (Watts) | 17 W | 17 W | 17 W | 17 W |
| Fault Protection | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting, Over Load, Over Temperature, Over Voltage |
| Control Features | - | - | - | - |
| Operating Temperature | -25°C ~ 85°C (TA) | -25°C ~ 85°C (TA) | -25°C ~ 85°C (TA) | -25°C ~ 85°C (TA) |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-SMD, Gull Wing | 8-DIP (0.300", 7.62mm) |
| Supplier Device Package | 8-MDIP | 8-MDIP | 8-LSOP | 8-DIP |
| Mounting Type | Through Hole | Through Hole | Surface Mount | Through Hole |
