Abstract: A Light Emitting Diode (LED) driving circuit includes a reference-voltage terminal, an input terminal to receive a pulse-width modulated (PWM) power signal, and a PWM output terminal. An LED is coupled across the PWM output terminal and the reference-voltage terminal. A measurement capacitor circuit and a voltage-divider network are coupled in parallel with the LED. During an interruption of the PWM power signal, a sense node of the voltage-divider provides a voltage indicative of a temperature of the LED prior to the interruption. The voltage indicative of the temperature is used to control driving of the LED.

Abstract: A Light Emitting Diode (LED) driving circuit includes a reference-voltage terminal, an input terminal to receive a pulse-width modulated (PWM) power signal, and a PWM output terminal. An LED is coupled across the PWM output terminal and the reference-voltage terminal. A measurement capacitor circuit and a voltage-divider network are coupled in parallel with the LED. During an interruption of the PWM power signal, a sense node of the voltage-divider provides a voltage indicative of a temperature of the LED prior to the interruption. The voltage indicative of the temperature is used to control driving of the LED.

Abstract: A coil carrier (1) comprising of an U shaped plastic profile has material thickness which fulfills dielectric strength requirements between the primary (2)and secondary winding. The outside applied primary ribbon turns (2) are bridging the gap of the U coil carrier. The inside fixed wound ferrite rod (3) is located close to the bottom of the U profile. The internal volumes at the closed side of the coil carrier (5) are already filled with glue. The remaining volume inside the ignition transformer can later easily been filled with encapsulating material through shown remaining penetration interstices between the primary turns (4) and two openings at the beginning and the end of the long rod ignition transformer (T) when finally being potted together with the ignition circuitry (C) in the housing (H) in one common process step.

Abstract: A coil carrier (1) comprising of an U shaped plastic profile has material thickness which fulfills dielectric strength requirements between the primary (2) and secondary winding. The outside applied primary ribbon turns (2) are bridging the gap of the U coil carrier. The inside fixed wound ferrite rod (3) is located close to the bottom of the U profile. The internal volumes at the closed side of the coil carrier (5) are already filled with glue. The remaining volume inside the ignition transformer can later easily been filled with encapsulating material through shown remaining penetration interstices between the primary turns (4) and two openings at the beginning and the end of the long rod ignition transformer (T) when finally being potted together with the ignition circuitry (C) in the housing (H) in one common process step.