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

TLE8242-2
Overview
Autozero
Value
“ON”
Autozero
Value
“OFF”
AVG
CURRENT READ
MIN
CURRENT READ
MAX
CURRENT READ
Current
Readout
CURRENT SET
POINT
DITHER STEP SIZE
DITHER STEPS
+
+
Dither
Generation
-
+
Auto Zero
Average
-+
A/D
Amp
KP
KI
Σ
+
+
PWM
Block
DUTY
CYCLE
DIRECT PWM ^{CL K}
POSx
NEGx
OUTx
Underlined = CAN BE PROGRAMMED VIA SPI
Italics = CAN BE MONITORED VIA SPI
Figure 3 Control Loop - Simplified Diagram
Table 1 describes the effect on the integrator of the PI controller of several events.
Table 1 Control Loop Integrator Control
Condition
Reset Active
V5D undervoltage
V5Ax undervoltage
ENABLE pin low (SPI message #10 bit EN = 0)
ENABLE pin low (SPI message #10 bit EN = 1)
VBAT overvoltage
Short to BAT
Phase_Sync Transition
Average Current set to 0
Control Mode set to Direct PWM
Main Period Set (N, M) Changed
KP, KI settings Changed
Action to Integrator
Cleared
Cleared
Cleared
Cleared
Remains Operational
Held at current value
Cleared
Remains Operational
Integrator value for first PWM cycle = value from end of
last complete PWM cycle.
Cleared
Cleared
Remains Operational
Remains Operational
Data Sheet
8
Rev. 1.0, 2010-02-09