Automotive-grade power bridges run cooler in SMT package

Automotive-grade power bridges run cooler in SMT package

New Products |
By Jean-Pierre Joosting

STMicroelectronics has introduced five automotive-grade power-semiconductor bridges in popular configurations, housed in an advanced ACEPACK™ SMIT package that eases assembly and enhances power density over conventional TO-style packages.

Engineers can choose from two STPOWER 650-V MOSFET half bridges, a 600-V ultrafast diode bridge, a 1200-V half-controlled full-wave rectifier, and a 1200-V thyristor-controlled bridge leg. All devices meet automotive-industry requirements and are suitable for electric vehicle on-board chargers (OBC) and DC/DC converters, as well as industrial power conversion.

The ACEPACK SMIT surface mounted package delivers the easy handling of an insulated package with the thermal efficiency of an exposed drain. It allows direct-bonded copper (DBC) die attachment for efficient top-side cooling. The 4.6 cm2 exposed metal topside of the ACEPACK SMIT permits easy attachment of a planar heatsink. This creates a space-saving low profile that maximizes thermal dissipation for greater reliability at high power. The module and heatsink can be placed using automated inline equipment, which saves manual processes and boosts productivity.

While minimizing the stack height and enhancing power density, the topside cooling design and 32.7- x 22.5-mm package footprint allow 6.6-mm lead-to-lead creepage distance. The tab-to-lead insulation is 4500 Vrms. The package also has low parasitic inductance and capacitance.

The SH68N65DM6AG and SH32N65DM6AG 650V-MDmesh DM6 MOSFET half bridges now available in ACEPACK SMIT are AQG-324 qualified. Their Rds(on) (max) of 41 mΩ in the SH68N65DM6AG and 97 mΩ in the SH32N65DM6AG ensures high electrical efficiency and low thermal dissipation. They can be used in DC/DC converters for both OBC and high voltage to low voltage section. Their multi-role flexibility helps streamline inventory and simplify procurement.

The STTH60RQ06-M2Y 600-V, 60-A full-wave bridge rectifier comprises ultrafast diodes with soft recovery characteristic and is PPAP capable for use in automotive applications. The STTD6050H-12M2Y 1200-V, 60-A half-controlled single-phase AC/DC bridge rectifier is AEC-Q101 qualified and has high noise immunity with dV/dt of 1000-V/μs.

The STTN6050H-12M1Y is a 1200-V, 60-A half bridge that comprises two internally connected thyristors (silicon-controlled rectifiers – SCRs). AEC-Q101 qualified, it can be used in automotive OBCs and charging stations and industrial applications such as AC/DC conversion in motor drives and power supplies, single- and tri-phase controlled rectifier bridges, totem-pole power-factor correction, and solid-state relay.
All automotive-grade devices are in production now.


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