IL6083_16 Datasheet, PDF (5/10 Pages) IK Semicon Co., Ltd – PWM Power Control IC with Interference Suppression

IL6083
Output Slope Control
The slope of the lamp voltage is internally limited to reduce radio interference by limitation of the voltage gain
of the PWM comparator.
Thus, the voltage rise on the lamp is proportional to the oscillator voltage increase at the switchover time
according to the equation.
Via an external capacitor, C4, the slope can be further reduced as follows:
To damp oscillation tendencies, a resistance of 100Ω in series with capacitance C4 is recommended.
Interference Suppression
• “On-board” radio reception according to VDE 0879 part 3/4.81
• Test conditions refering to Figure 3
• Application circuit according to Figure 1 or Figure 4
• Load: nine 4 W lamps in parallel
• Duty cycle = 18%
• VBatt = 12 V
• fOsc = 100 Hz
Figure 3. Voltage Spectrum of On-board Radio Reception
Rev. 00