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US 2018/0324915 A1Published application
Electronic converter and related lighting system
AssigneeOSRAM GmbH
InventorDaniele Luccato
Life of this patent
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Abstract
Herein is disclosed an electronic converter, including a measurement circuit for determining a first signal indicative of the voltage or current supplied by the electronic converter, a regulation circuit for generating a regulation signal as a function of the first signal and one or more reference signals, and a driver circuit for driving the switching stage of the electronic converter as a function of the regulation signal.
Claims14
An electronic converter comprising:
- two input terminals for receiving an input voltage;
- two output terminals for providing a DC voltage or a DC current;
- a transformer comprising a primary winding and a secondary winding;
- a switching stage configured to selectively transfer energy from said two input terminals to said primary winding of said transformer;
- a rectification and filter circuit connected between said secondary winding of said transformer and said two output terminals;
- a measurement circuit configured to determine a first signal indicative of said DC voltage or said DC current provided via said output terminals;
- a regulation circuit configured to generate a regulation signal as a function of said first signal and one or more reference signals;
- a driver circuit configured to drive said switching stage as a function of said regulation signal;
- characterized in that said electronic converter comprises:
- an optical, inductive or capacitive coupler;
- a transmission circuit configured to:
- a) receive said first signal and a second signal,
- b) generate a bit sequence indicative of said second signal,
- c) generate an encoded bit sequence by applying a Manchester coding to said bit sequence,
- d) generate a pulse width modulated signal applied to the input of said optical, inductive or capacitive coupler, wherein said pulse width modulated signal comprises for each bit of said encoded bit sequence:
- a sequence of a first number of pulses with a first frequency when the respective bit has a first logic value, and
- a sequence of a second number of pulses with a second frequency when the respective bit has a second logic value,
- e) vary the duty cycle of said pulse width modulated signal as a function of said first signal, and
- a receiver circuit configured to monitor the received signal at the output of said optical, inductive or capacitive coupler, and determine a third signal indicative of said first signal and a fourth signal indicative of said second signal.
16 more elements
A lighting system comprising a lighting module and an electronic converter, said electronic converter comprising:
- two input terminals for receiving an input voltage;
- two output terminals for providing a DC voltage or a DC current;
- a transformer comprising a primary winding and a secondary winding;
- a switching stage configured to selectively transfer energy from said two input terminals to said primary winding of said transformer;
- a rectification and filter circuit connected between said secondary winding of said transformer and said two output terminals;
- a measurement circuit configured to determine a first signal indicative of said DC voltage or said DC current provided via said output terminals;
- a regulation circuit configured to generate a regulation signal as a function of said first signal and one or more reference signals;
- a driver circuit configured to drive said switching stage as a function of said regulation signal;
- characterized in that said electronic converter comprises:
- an optical, inductive or capacitive coupler;
- a transmission circuit configured to:
- a) receive said first signal and a second signal,
- b) generate a bit sequence indicative of said second signal,
- c) generate an encoded bit sequence by applying a Manchester coding to said bit sequence,
- d) generate a pulse width modulated signal applied to the input of said optical, inductive or capacitive coupler, wherein said pulse width modulated signal comprises for each bit of said encoded bit sequence:
- a sequence of a first number of pulses with a first frequency when the respective bit has a first logic value, and
- a sequence of a second number of pulses with a second frequency when the respective bit has a second logic value,
- e) vary the duty cycle of said pulse width modulated signal as a function of said first signal, and
- a receiver circuit configured to monitor the received signal at the output of said optical, inductive or capacitive coupler, and determine a third signal indicative of said first signal and a fourth signal indicative of said second signal.
16 more elements
Dependencies are inferred from the claim text.