SC225KSIT

120 kHz Bandwidth, High Voltage Isolation

Current Sensor with Integrated Overcurrent Detection

2/13

General Description

The SEC™ SC225KSIT current sensor provides economical and precise means for current sensing

applications in industrial, commercial, and communications systems. The device is offered in a small

footprint surface mount package that allows easy implementation in customer applications.

The SC225KSIT consists of a precision linear Hall sensor integrated circuit with a copper conduction

path located near the surface of the silicon die. Applied current flows through the copper conduction

path, and the analog output voltage from the Hall sensor linearly tracks the magnetic field generated

by the applied current. The accuracy of the SC225KSIT is maximized with this patented packaging

configuration because the Hall element is situated in extremely close proximity to the current to be

measured.

High level immunity to current conductor dV/dt and stray electric fields, offered by SEC proprietary

integrated shield technology, results in low ripple on the output and low offset drift in high-side, high

voltage applications.

threshold for the device. When the current flowing through the copper conduction path (between the

low state. Factory programming of the linear Hall sensor inside of the SC225KSIT results in

exceptional accuracy in both analog and digital output signals.

The internal resistance of the copper path used for current

sensing is typically 1 mΩ, for low power

loss. Also, the current conduction path is electrically isolated from the low voltage sensor inputs and

outputs. This allows the SC225KSIT family of sensors to be used in applications requiring electrical

isolation, without the use of opto-isolators or other costly isolation techniques. The SC225KSIT is

provided in a small, surface mount SOIC16 package. The lead frame is plated with 100% matte tin,

which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally,

the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt

from RoHS. The device is fully calibrated prior to shipment from the factory.

Applications

1.

Motor control and protection

2.

Load management and overcurrent detection

3.

Power conversion and battery monitoring / UPS systems

General Package Inform

Part Number

I

Sens (typ)

at V= 5 V (mV/A)

Latched

Fault

T

Packing

SC225KSIT

±50

28

Yes

–40 to 125

Tape and Reel, 1000

pieces per reel