Industrial, outdoor, and residential LED lighting systems need different arrangements of electronic components. Block diagrams show how Littelfuse

Series: Ultra Junction X4 Class
150V Automotive Qualified Ultra Junction X4-Class Power MOSFETs
These devices are developed using a charge compensation principle and proprietary process technology, resulting in Power MOSFETs with significantly reduced resistance RDS(on) and gate charge Qg. A low on-state resistance reduces the conduction losses; it also lowers the energy stored in the output capacitance, minimizing the switching losses. A low gate charge results in higher efficiency at light loads as well as lower gate drive requirements. In addition, these MOSFETs are avalanche rated and exhibit a superior dv/dt performance. Also due to the positive temperature coefficient of their on-state resistance, they can be operated in parallel to meet higher current requirements.
- AEC-Q101 Qualified for automotive appplications
- Low on-resistance RDS(ON)and gate charge Qg
- dv/dt ruggedness
- Avalanche capability
- International standard packages
- High Power Density
- Easy to Mount
- Space Savings
Ultra Junction X4 Class Parts
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Part Number | Actions | VDSS (V) | RDS(ON),max @ 25 °C (Ω) | ID, cont @ 25 °C (A) | Gate Charge (nC) | RthJC (K/W) | Configuration | Package Type | CISS (pF) | trr,typ (ns) | PD (W) |
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Part Number | Actions | VDSS (V) | RDS(ON),max @ 25 °C (Ω) | ID, cont @ 25 °C (A) | Gate Charge (nC) | RthJC (K/W) | Configuration | Package Type | CISS (pF) | trr,typ (ns) | PD (W) | |
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Ultra Junction X4 Class Applications

LED Lighting
Highlights Section
- Synchronous rectification in switching
- power supplies
- Motor control (48V-80V systems)
- DC-DC converters
- Uninterruptible power supplies
- Electric forklifts
- Class-D audio amplifiers
- Telecom systems