TLE8242-2 Datasheet, PDF (6/78 Pages) Infineon Technologies AG – 8 Channel Fixed Frequency Constant Current Control With Current Profile Detection

POSx
NEGx
OUTx
Electronic
Module
TLE8242-2
Overview
Vs
0.2 Ω
10nF
Figure 1 External Circuit Diagram for Direct PWM Mode Operation
1.3.2 Constant Current Mode Operation
During constant current operation, the POSx and NEGx pins must be connected to the circuit in the configuration
shown in Figure 2.
Note: An external recirculation diode is required in this configuration otherwise the IC may be damaged.
Vs
Electronic
Vs
Module
POSx
NEGx
OUTx
0.2 Ω
10nF
Figure 2 External Circuit Diagram for Constant Current Mode Operation
During constant current operation, the PWM control signal driven at the OUTx pin is controlled by the control loop
shown in Figure 3. The PWM Frequency is programmed via the SPI message # 8. In this message the main period
Data Sheet
6
Rev. 1.0, 2010-02-09