1. Package & Pinout: IPB120: PG-TO263-3-2 (Standard 3-pin D2PAK) IPB180: PG-TO263-7 (7-pin D2PAK, featuring additional Kelvin source and power source pins) The TO263-7 package reduces the impact of source lead inductance on gate drive via an independent driver loop (Kelvin source), enabling faster and more reliable switching while mitigating ringing risk. This necessitates a complete PCB layout redesign. 2. On-State Resistance (Rds(on)) & Continuous Drain Current (Id): IPB120: Rds(on) = 2.8 mΩ @ 100A, Id = 120A IPB180: Rds(on) = 1.7 mΩ @ 100A, Id = 180A The IPB180 offers a significant reduction in conduction loss (approximately 40% lower) and a 50% increase in current handling capability. This results in lower temperature rise at the same current or the ability to handle higher current under equivalent thermal conditions, thereby improving system efficiency and power density. 3. Switching Performance & Drive Requirements: IPB120: Qg = 195 nC, Ciss = 15750 pF IPB180: Qg = 270 nC, Ciss = 21900 pF The IPB180 has higher gate charge and input capacitance, which will result in relatively slower switching speeds and increased switching losses. To fully leverage its low Rds(on) advantage, a more robust gate driver (capable of delivering higher peak current) is required to maintain adequate switching speed. 4. Power Dissipation Capability: IPB120: Pd = 188W IPB180: Pd = 250W Benefiting from an optimized die and package design, the IPB180 possesses a higher theoretical thermal dissipation capability. Combined with its lower on-resistance, it can handle higher steady-state power in practical applications.