TLE82452-3SA_15 Datasheet, PDF (30/71 Pages) Infineon Technologies AG – 2 Channel High-Side and Low-Side Linear Solenoid Driver IC

TLE82452-3SA
Current Control
microcontroller to calculate the average switching cycle period over a dither period. If dither is disabled, the
contents of this register is 0.
The contents of the feedback registers are 0 when the respective channel is not operating. The number of PWM
cycles per dither cycle value is 0 if dither is disabled.
8.9
Calibration Mode
In case the accuracy of the current regulation must be improved by module calibration, the TLE82452-3SA device
includes a calibration mode of operation. In order to enter calibration mode, the CM bit in the CALIBRATION
register must be set by writing a 1 to this bit location. Calibration mode will not be entered unless the setpoint for
all two channels are zero and the EN enable bit (in the SETPOINT register) is set to 1. If one or more of the
channels is not off and a 1 is written to the CM bit, the write command is ignored and the CM bit will remain at 0.
In the Calibration Mode of operation, the individual transistors of the output stages can be controlled by writing to
the CALx bits in the CALIBRATION register. The resulting output current will be measured by the device and can
be monitored by reading the FEEDBACK register. When the device is in calibration mode, the FEEDBACK register
contains a 16 bit field which represents the average load current measured during the calibration. Ical = 1.5 *
readout / 65535. The Current Feedback Register is not valid if the PWM period is set to 0x00 hex in the PWM
Register.
Current limitation is not active during calibration mode. Exceeding 1.5 A may damage the device.
Data Sheet
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30
Rev 1.0, 2015-03-27