DALI Interface Circuit with Bootstrap Function

Patent metadata

Field	Value
Publication number	US-2019174591-A1
Application number	US-201816203140-A
Country	US
Kind code	A1
Filing date	Nov 28, 2018
Priority date	Dec 1, 2017
Publication date	Jun 6, 2019
Grant date	—

Abstract

A DALI interface circuit with bootstrap function, the DALI interface circuit is powered by a power supply circuit, and includes a rectification module, a communication transmitting circuit electrically connected to the rectification module, and a signal input terminal electrically connected to the communication transmitting circuit, the communication transmitting circuit has a MOS transistor Q 2 and a bootstrap circuit electrically connected to the MOS transistor Q 2. The invention simplifies the solution, reduces components, reduces the cost, and saves space on the circuit board. The communication logic has become simpler and more stable.

First claim

1 . A DALI interface circuit with bootstrap function, the DALI interface circuit is powered by a power supply circuit, and includes a rectification module, a communication transmitting circuit electrically connected to the rectification module, and a signal input terminal electrically connected to the communication transmitting circuit, characterized in that: the communication transmitting circuit comprises a MOS transistor Q 2 and a bootstrap circuit electrically connected to the MOS transistor Q 2 , the bootstrap circuit includes a diode D 4 , a resistor R 7 , the resistor R 10 , the capacitor C 11 , the resistor R 9 , the anode of the diode D 4 is electrically connected to the output end of the power supply circuit, the cathode of the diode D 4 is connected to one end of the resistor R 7 , and the capacitor C 11 is connected in series with the resistor R 9 and then connected in parallel with the resistor R 10 ,one end of the resistor R 10 is connected to the other end of the resistor R 7 , the other end of the resistor R 10 is grounded, the gate of the MOS transistor Q 2 is electrically connected between the resistor R 7 and the resistor R 10 , and the output end of the rectification module is connected to the drain of the MOS transistor Q 2 , the source of the MOS transistor Q 2 is grounded, and the signal input terminal is electrically connected between the capacitor C 11 and the resistor R 9 .

2 . The DALI interface circuit with bootstrap function as claimed in claim 1 , wherein the bootstrap circuit further includes a capacitor C 10 , one end of the capacitor C 10 is electrically connected to the gate of the MOS transistor Q 2 , and the other end of the capacitor C 10 is grounded.

3 . The DALI interface circuit with bootstrap function as claimed in claim 1 , wherein the DALI interface circuit further includes a communication receiving circuit electrically connected to the rectification module and a signal receiving terminal electrically connected to the communication receiving circuit, the communication receiving circuit comprising a diode D 3 , a resistor R 5 , a resistor R 6 , and a MOS transistor Q 1 , a resistor R 2 , a resistor R 3 , wherein an anode of the diode D 3 is connected to an output end of the rectification module, a cathode of the diode D 3 is connected to one end of the resistor R 5 , and the other end of the resistor R 5 is connected to one end of the resistor R 6 and the gate of the MOS transistor Q 1 , the source electrode of the MOS transistor Q 1 is connected to the other end of the resistor R 6 and is grounded, one end of the resistor R 2 is connected to the output end of the power supply circuit, the other end of the resistor R 2 is connected to one end of the resistor R 3 and the drain of the MOS transistor Q 1 , and the other end of the resistor R 3 is connected to the signal receiving terminal.

4 . The DALI interface circuit with bootstrap function as claimed in claim 1 , wherein the DALI interface circuit further includes an MCU processor electrically connected to the communication receiving circuit and the communication transmitting circuit, the MCU processor controls the MOS transistor Q 2 to be turned on or off, and processes the square wave differential signal of the DALI bus, and outputs the processed DALI digital signal.

5 . The DALI interface circuit with bootstrap function as claimed in claim 4 , wherein the power supply circuit is respectively electrically connected to the rectification module and the MCU processor, and the power supply circuit converts an input voltage into an output voltage, which is then used to supply power to the MCU processor.

6 . The DALI interface circuit with bootstrap function as claimed in claim 5 , wherein the MCU processor is an MSP430FR2032 model.

7 . The DALI interface circuit with bootstrap function as claimed in claim 5 , wherein the power supply circuit includes a voltage shaping circuit and a voltage conversion circuit, one end of the voltage shaping circuit is connected to an output end of the rectification module, and the other end of the voltage shaping circuit is connected to one end of the voltage conversion circuit, the other end of the voltage conversion circuit is connected to the MCU processor.

8 . The DALI interface circuit with bootstrap function as claimed in claim 7 , wherein the voltage shaping circuit 11 includes a capacitor D 1 , a varistor FV 1 , a capacitor C 2 , and a capacitor C 3 ,the capacitor C 2 is connected in parallel with the capacitor C 3 , and the power supply terminal of 9-18V and the anode of the diode D 1 and one end of the varistor FV 1 is connected, and the cathode of the diode D 1 is connected to one end of the capacitor C 2 , the voltage conversion circuit includes a power supply chip, a capacitor C 1 , a diode D 2 , an inductor L 1 , a resistor R 1 , a resistor R 4 , a capacitor C 4 , a capacitor C 5 , and a capacitor C 6 , wherein one end of the capacitor C 3 is connected to the 4 pin and the 5 pin of the power supply chip, the other end of the capacitor C 3 is connected to the 2 pin of the power supply chip and grounded, and the 1 pin of the power supply chip is connected to the 6 pin of the power supply chip, the cathode of diode D 2 and the end of inductor L 1 through capacitor C 1 , the anode of the diode D 2 is grounded, the capacitor C 4 , the capacitor C 5 , and the capacitor C 6 are connected in parallel, the other end of the inductor L 1 is connected to one end of the resistor R 1 and the capacitor C 4 and is connected to the supply voltage VDD, and the other end of the resistor R 1 is connected to one end of the resistor R 4 and the 3-pin of the power supply chip, and the capacitor C 4 is connected to the other end of the resistor R 4 and grounded.

9 . The DALI interface circuit with bootstrap function as claimed in claim 5 , wherein the power supply circuit includes a varistor FV 2 , a resistor R 8 , a transistor Q 4 , and a voltage regulator block N 2 , a resistor R 11 , a resistor R 12 , a capacitor C 7 , wherein the power supply terminal of 9.5-22.5V is connected to the collector of transistor Q 4 and one end of resistor R 8 and varistor FV 2 , the other end of resistor R 8 and the base of transistor Q 4 and the cathode of the voltage regulator block N 2 is connected, the emitter of the transistor Q 4 is connected to one end of the resistor R 11 and the capacitor C 7 and connected to VDD, the anode of the voltage regulator block N 2 is connected to one end of the resistor R 12 and the other end of the capacitor C 7 and the varistor FV 2 , and is grounded, the other end of the resistor R 11 is connected to the other end of the resistor R 12 and the reference terminal of the voltage regulator block N 2 .

10 . The DALI interface circuit with bootstrap function as claimed in claim 1 , wherein the DALI interface circuit further includes a signal input circuit, the signal input circuit is connected to the MCU processor, and the signal input circuit comprises a button signal input circuit, an RF signal input circuit, an infrared remote control signal input circuit or one or more type of wired signal input circuit.

Assignees

• Lin Wanjiong
• Self Electronics Co Ltd
• Self Electronics Usa Corp
• Wanjiong Lin

Inventors

• Zhao Pengyuan
• You Xiaobo

Classifications

• H04L25/0264 Primary

  Arrangements for coupling to transmission lines (duplexing arrangements H04L5/14; line equalisers, line build-out devices H04L25/03878) · CPC title

• H04L25/028

  Arrangements specific to the transmitter end · CPC title

• H05B33/0842 Primary

  Electricity · mapped topic

• H05B37/02

  Electricity · mapped topic

• H05B47/183 Primary

  using digital addressable lighting interface [DALI] communication protocols · CPC title