TLE8242-2 Datasheet, PDF (61/78 Pages) Infineon Technologies AG – 8 Channel Fixed Frequency Constant Current Control With Current Profile Detection

Field
Bits
Average
19:0
Dither
Current
Type
DATA
TLE8242-2
Functional Description and Electrical Characteristics
Description
20 bit summation of the total current over a dither period.
(RESET Value = 0)
Dither
Current
Feedback
[mA] =
Avg Dither Current
2¹⁵ ∗ Dither Steps
∗
320[mV]
Rsense [Ohm]
Equation: Average Dither Current Feedback with Dither enabled
(12)
Dither Current Feedback [mA] = ^{Avg Dither Current} ∗ ^320[mV]
2¹³
Rsense [Ohm]
Equation: Average Dither Current Feedback with Dither disabled
(13)
Note: When the selected channel is different than the previously selected channel (the last time this message was
addressed), the new Average Dither Current data will be available after no more than two dither cycles. When the
selected channel is the same as the previously selected channel, the new Average Dither Current data will be
available in no more than one dither cycle.
Note: When M=512 in Direct PWM mode, the following formula applies. The application software must ensure that
the register has not overflowed.
Dither Current Feedback [mA] = ^{Avg Dither Current} ∗ ^320[mV]
2¹⁷ ∗ Dither Steps Rsense [Ohm]
Equation: Average Dither Current Feedback M=512 with dither enabled
(14)
Dither Current Feedback [mA] = ^{Avg Dither Current} ∗ ^320[mV]
2¹⁵
Rsense [Ohm]
Equation: Average Dither Current Feedback M=512 with dither disabled
(15)
Data Sheet
61
Rev. 1.0, 2010-02-09