SRM-SPM

The world’s first Smart Power Module (SPM®) designed especially for driving single-phase switched reluctance motors (SRM) for vacuum cleaners. Fairchild’s SRM-SPM® integrates a high-voltage IC (HVIC) and low-voltage IC (LVIC), IGBTs, fast recovery diodes and a thermistor in an ultra-compact (44mm X 26.8mm) Mini-DIP package. This package features Direct Bonded Copper (DBC) technology that significantly increases thermal performance. Compared to typical discrete solutions, Fairchild’s FCAS50SN60 reduces power circuit space by up to 40%, enabling designers to incorporate the controller into the SRM assembly. This compact solution greatly reduces overall system size while simultaneously enhancing reliability.

Product Offering

Products	BV_CES (Min) (V)	I_c (T_c=25^oC) (A)	Motor Rating		Heat Sink	Thermistor
			Watt (kW)	(V_AC) (V)
FCAS50SN60	600	50	2	220	DBC	NTC

Features

• 600V/50A rating asymmetric bridge converter.
• Low-loss efficient IGBTs and FRDs optimized for SRM drive applications
• Single-phase IGBT asymmetric bridge converter including control ICs for gate driving and protection
- High-side: Control circuit under voltage (UV) protection (without fault signal output)
- Low-side: UV and short-circuit (SC) protection through external shunt resistor (with fault signal output)
• Single-grounded power supply and opto-coupler-less interface due to built-in HVIC
• High-active input signal logic
• Isolation voltage rating of 2500Vrms/min
• Very low leakage current due to ceramic and DBC substrate.
• Package designed to satisfy the basic creepage and clearance spacing – UL certified No. E209204

Application Circuit Example