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Multi-chip module drives motors up to 70A

Lead-free package hosts controller chip and power-MOSFET bridge

Infineon has announced additions in its NovalithIC family of integrated driver ICs for motor drive applications. The components combine three chips in a lead-free package, using both chip-on-chip and side-by-side assembly, to reduce pcb space for power electronics driving motor applications with currents of up to 70 Ampere. Applications include automotive heating, and air-conditioning systems (HVAC), seat belt systems and fuel pumps as well as in industrial drives. The BTN7971B doubles the switching speed of the previous devices, reducing the switching losses by 50 percent. The package contains a fully-integrated high-current half-bridge; a p-channel high-side MOSFET and an n-channel low-side MOSFET with an integrated driver IC. On-state resistance is typically 16 mOhm and the quiescent current 7 µA, in an architecture that eliminates the need for a charge pump. The BTN7930 outputs up to 32A; the BTN7960, 47A; and the BTN7970 up to typically 70A. All operate in PWM applications with frequencies of up to 25 kHz.
A further device, the BTN7971, has improved switching behaviour with losses reduced by 50%. Engineering samples of the BTN7971 are available now. Example pricing for the BTN 7960 in a TO-263 package is €1,95 (100,000)