Current sensor integrated circuit
Silicon Laboratories

Silicon Labs' isolated AC and high-side DC current sensors provide current sensing solutions for a wide range of power applications. The Si85xx family is ideal for a broad range of applications including ac-dc switching power supplies, isolated dc-dc supplies, UPS systems, motor control and electronic lighting ballasts.

Features

Isolated AC Current Sensors (Si850x/1x)
5, 10 and 20 A full-scale versions, 2 VPP output swing
Available 5 kV isolation rating
±5% measurement accuracy
Low loss: < 1.3 mΩ series resistance
Leading-edge noise suppression
"Ping-Pong" output mode allows one Si851x to replace two current transformers in full-bridges
High-side or low-side current sensing

High-Side DC Current Sensor (Si8540)
+5 to +36 V supply operation
0.2% full scale accuracy
90 μA max supply current
9 μA shutdown current
-40 to +85 ºC

Applications

Power supplies
Motor controls
Lighting equipment
Industrial equipment
Battery chargers
Smart battery packs
UPS Sytems