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UCC2926

Unitrode
Part Number UCC2926
Manufacturer Unitrode
Description +-20A Integrated Current Sensor
Published May 8, 2015
Detailed Description ± 20A Integrated Current Sensor application INFO available UCC1926 UCC2926 UCC3926 FEATURES • Integral Non-inductive ...
Datasheet PDF File UCC2926 PDF File

UCC2926
UCC2926


Overview
± 20A Integrated Current Sensor application INFO available UCC1926 UCC2926 UCC3926 FEATURES • Integral Non-inductive Current Sense Element with Internal Kelvin Connections • 20A Current Rating • Bi-directional, High Side or Low Side Sensing • Internal Temperature Nulling Circuitry for Current Sense Element and Amplifier • Logic Compatible Current Direction Status Output • Low Offset, Chopper Stabilized Current Sense Amplifier • Uncommitted Amplifier with User Programmable Gain • Overcurrent Indication with User Programmable Threshold DESCRIPTION The UCC3926 Current Sensor IC contains a wideband, transimpedance amplifier for converting the current through an internal, non-inductive 1.
3mΩ shunt resistor into a proportional voltage.
The sense element operates in both high-side (VDD referenced) and low-side (GND referenced) applications.
The UCC3926 can measure currents up to ±20A.
This transimpedance amplifier gain is precisely trimmed to 33.
3mΩ to convert a 15A input into a 500mV output signal.
It has a very low input offset voltage from chopper-stabilization.
A cross-switching block rectifies the input signal by forcing the differential output, AOP positive with respect to the other differential output, AON.
SIGN indicates the polarity of the current.
The UCC3926 programmable amplifier provides three functions.
It converts the differential transimpedance output signal into a single-ended signal.
It has a user-controlled gain stage that sets the maximum current level to the desired voltage and it level shifts the zero current point to the desired level as well.
A comparator then compares the output of the instrumentation amplifier to a user-set reference voltage on OCREF, which provides an overcurrent status bit OC.
The UCC3926 is available in the 16 pin SOIC package.
BLOCK DIAGRAM SLUS266A - OCTOBER 1999 UDG-97139-1 ABSOLUTE MAXIMUM RATINGS Input Sense Current (IIN) .
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± 20A Supply Voltage, VDD .
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