CPC3981 ve CPC3982 MOSFET
Providing a closed switch function when no power is present can be challenging. Littelfuse has got a large portfolio of normally on N-Channel Depletion Mode MOSFET devices. These are turned-off with a negative gate-source voltage.
CPC3981 and CPC3982 are devices in small SOT-223-2L and SOT-23 packages and their unique 800 V drain-source blocking voltage capability makes them ideal for use in mains powered Switched Mode Power Supply (SMPS) and Power Factor Correction (PFC) start-up circuits to provide bias power in the moment of start-up. Compared to conventional resistor divider start-up circuits, the depletion mode MOSFET turns off once the SMPS is operating, it eliminates permanent losses through that path and by that it increases the SMPS circuit efficiency.
- SOT-223-2L and SOT-23
- Unique 800 V breakdown voltage
- ID of minimum 100 mA and 20 mA
- Small power packages
- Large Drain-Source creepage distances
- RDS(on)max of 45 Ω and 380 Ω
- VGS(off): −1.4 V to −3.1 V
- SOT-223-2L and SOT-23
- Normally on switches
- Power supply start-up circuits
- Solid State Relays
- Auxiliary power supplies
- Telecommunications
- Current regulators