The TPAFE411 is designed for Hall elements to use in closed-loop current-sensor modules. The internal precision excitation circuitry for the Hall-element could effectively eliminate the offset and offset-drift of the Hall element. The TPAFE411 also provides a 350 mA H-bridge for driving the sensor compensation coil, and an internal precision current sensing amplifier to generate the output signal.

There is a high accuracy voltage reference, high accuracy HALL Sensor front end and precision current sensing amplifier inside TPAFE411. These techniques significantly improve the accuracy of the overall current-sensor module. When the power supply is 5 V, the output voltage is pin-selectable to support a 2.5 V output. When the power supply is 3.3 V, the output voltage is to support a 1.65 V output. For the heat dissipation, 4 mm × 4 mm QFN package with exposed pad is selected for the TPAFE411.

The TPAFE411 is specified to work over industrial temperature range of −40°C to +125°C.

Features

 Internal Precision Voltage Reference

− Accuracy: 0.2% (max)

− Temp Drift: 50 ppm (max)

− Pin Selectable for 2.5 V, 1.65 V, and Ratio Metric

 Switching Current HALL Sensor Excitation

− Reduce HALL Sensor Offset and Drift

− Reduce HALL Sensor 1/f Noise

 Extended Current Measurement Range

− H-Bridge Drive Capability: 350 mA

 Precision Current Sensing Amplifier

− Offset and Drift: 100 μV and 2 μV/°C (Max)

− Bandwidth: 200 kHz

 Overrange and Error Flags

 Power Supply: 2.7 V to 5.5 V

 Package: QFN 4 mm x 4 mm with exposed pad

 Temp Range: −40°C to +125°C

Applications

 Close-Loop HALL Sensor Module