TLE7241E Datasheet, PDF (44/71 Pages) Infineon Technologies AG – Dual Channel Constant Current Control Solenoid Driver

TLE 7241E
Functional Description and Electrical Characteristics
Figure 22 Symmetrical Dither Clipping
5.5.4
Error Correction Registers / Average Switch Threshold
Trimming
The average switch threshold of each channel is trimmed at wafer test under the
following operating conditions: T_amb = 25 °C, V_BAT = 14 V, V_cc = 5.0 V, V_REF = 2.5 V,
average current command = 299_H (800 mA with 1 Ω sense resistor), dither = off,
hysteresis = 80 mVpp.
The TLE 7241E includes 5 error correction registers for each channel. The registers are
written during room temperature wafer testing. After the device has been trimmed, the
average of the upper and lower switch thresholds is measured at 5 average current
operating points. The difference in the measured value and the ideal value is
permanently stored in the 5 error registers. The contents of the error correction register
are an 8 bit signed value that must be added to the ideal current command to minimize
the average current error.
Data Sheet
44
Rev. 1.1, 2009-01-19