Low-loss current sensor reduces board space

Claimed to reduce board space by 75%, the Si8500 low-loss high-accuracy ac current sensor family measures up to 20 A of current for control and protection in power systems and is ideal for a broad range of applications including ac/dc switching power supplies, isolated dc/dc supplies, motor control and electronic ballasts for lighting. The device integrates the functional equivalent of a current transformer circuit into a 4 x 4 x 1-mm QFN package, including the current transformer, blocking diode, burden resistor and output RC filter.

The family also integrates temperature and offset compensation circuitry to achieve a measurement accuracy of ±5% with a 2 Vpp full-scale output signal swing. The Si8510 family also offers a “ping-pong” output that enables one Si8510 to replace two current transformer circuits in full-bridge applications. ($1.49 ea/1,000samples now.)

Silicon Laboratories , Austin , TX
Sales 512-416-8500
http://www.silabs.com