Surface mount transformers sense current up to 20A
Designed for load current measurement and control in switching power supplies and overload/short-circuit protection, a series of surface mount current sense transformers have been unveiled by Coilcraft. The CST7030 transformers measure just 5.2 X 7.0mm (with a maximum height of 3.0mm) and sense up to 20A of current at frequencies between 10kHz and 1MHz.
The devices are qualified to AEC-Q200 Grade 1 standards, making them suited for conventional vehicle and xEV (EV, HEV, FCEV) applications such as current measurement in traction motors and battery management systems, as well as for use in 48V vehicle systems.
The CST7030 series is available with five turns ratios (primary-to-secondary) ranging from 1:20 to 1:150. It offers very low primary DC resistance of 0.0015Ω and 500Vrms, one minute isolation (hipot) between windings. Coilcraft also offers a high-isolation (1,500VDC) version with its CU8965-AL series. The current sense transformers feature RoHS compliant tin-silver, over tin, over nickel, over phos bronze terminations and have a maximum reflow temperature of +260°C.
Parts are available from stock with free evaluation samples available.
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