# US 2019/0174591 A1 · DALI Interface Circuit with Bootstrap Function

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0174591 A1
- Document ID: US20190174591A1
- Status: Published application
- Kind: A1
- Application number: 16/203,140
- Filed: 2018-11-28
- Published: 2019-06-06
- Earliest claimed: 2017-12-01
- Assignees: Wanjiong Lin; Self Electronics Co., Ltd.; Self Electronics USA Corp.
- Applicants: Self Electronics Co., Ltd.; Self Electronics USA Corporation
- Inventors: Pengyuan Zhao; Xiaobo You
- Web page: https://patentgrep.com/patent/US20190174591A1

## CPC

- H04L 25/0264: {Arrangements for coupling to transmission lines (duplexing arrangements H04L5/14; line equalisers, line build-out devices H04L25/03878)}
- H04L 25/028: {Arrangements specific to the transmitter end}
- H05B 47/183: {using digital addressable lighting interface [DALI] communication protocols}
- H05B 45/3725: Switched mode power supply [SMPS]
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## 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 Q2 and a bootstrap circuit electrically connected to the MOS transistor Q2. 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.

## Claims

### 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 Q2 and a bootstrap circuit electrically connected to the MOS transistor Q2, the bootstrap circuit includes a diode D4, a resistor R7, the resistor R10, the capacitor C11, the resistor R9, the anode of the diode D4 is electrically connected to the output end of the power supply circuit, the cathode of the diode D4 is connected to one end of the resistor R7, and the capacitor C11 is connected in series with the resistor R9 and then connected in parallel with the resistor R10,one end of the resistor R10 is connected to the other end of the resistor R7, the other end of the resistor R10 is grounded, the gate of the MOS transistor Q2 is electrically connected between the resistor R7 and the resistor R10, and the output end of the rectification module is connected to the drain of the MOS transistor Q2, the source of the MOS transistor Q2 is grounded, and the signal input terminal is electrically connected between the capacitor C11 and the resistor R9.

### Claim 2 (depends on 1)

The DALI interface circuit with bootstrap function as claimed in claim 1, wherein the bootstrap circuit further includes a capacitor C10, one end of the capacitor C10 is electrically connected to the gate of the MOS transistor Q2, and the other end of the capacitor C10 is grounded.

### Claim 3 (depends on 1)

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 D3, a resistor R5, a resistor R6, and a MOS transistor Q1, a resistor R2, a resistor R3, wherein an anode of the diode D3 is connected to an output end of the rectification module, a cathode of the diode D3 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to one end of the resistor R6 and the gate of the MOS transistor Q1, the source electrode of the MOS transistor Q1 is connected to the other end of the resistor R6 and is grounded, one end of the resistor R2 is connected to the output end of the power supply circuit, the other end of the resistor R2 is connected to one end of the resistor R3 and the drain of the MOS transistor Q1, and the other end of the resistor R3 is connected to the signal receiving terminal.

### Claim 4 (depends on 1)

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 Q2 to be turned on or off, and processes the square wave differential signal of the DALI bus, and outputs the processed DALI digital signal.

### Claim 5 (depends on 4)

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.

### Claim 6 (depends on 5)

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

### Claim 7 (depends on 5)

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.

### Claim 8 (depends on 7)

The DALI interface circuit with bootstrap function as claimed in claim 7, wherein the voltage shaping circuit 11 includes a capacitor D1, a varistor FV1, a capacitor C2, and a capacitor C3,the capacitor C2 is connected in parallel with the capacitor C3, and the power supply terminal of 9-18V and the anode of the diode D1 and one end of the varistor FV1 is connected, and the cathode of the diode D1 is connected to one end of the capacitor C2, the voltage conversion circuit includes a power supply chip, a capacitor C1, a diode D2, an inductor L1, a resistor R1, a resistor R4, a capacitor C4, a capacitor C5, and a capacitor C6, wherein one end of the capacitor C3 is connected to the 4 pin and the 5 pin of the power supply chip, the other end of the capacitor C3 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 D2 and the end of inductor L1 through capacitor C1, the anode of the diode D2 is grounded, the capacitor C4, the capacitor C5, and the capacitor C6 are connected in parallel, the other end of the inductor L1 is connected to one end of the resistor R1 and the capacitor C4 and is connected to the supply voltage VDD, and the other end of the resistor R1 is connected to one end of the resistor R4 and the 3-pin of the power supply chip, and the capacitor C4 is connected to the other end of the resistor R4 and grounded.

### Claim 9 (depends on 5)

The DALI interface circuit with bootstrap function as claimed in claim 5, wherein the power supply circuit includes a varistor FV2, a resistor R8, a transistor Q4, and a voltage regulator block N2, a resistor R11, a resistor R12, a capacitor C7, wherein the power supply terminal of 9.5-22.5V is connected to the collector of transistor Q4 and one end of resistor R8 and varistor FV2, the other end of resistor R8 and the base of transistor Q4 and the cathode of the voltage regulator block N2 is connected, the emitter of the transistor Q4 is connected to one end of the resistor R11 and the capacitor C7 and connected to VDD, the anode of the voltage regulator block N2 is connected to one end of the resistor R12 and the other end of the capacitor C7 and the varistor FV2, and is grounded, the other end of the resistor R11 is connected to the other end of the resistor R12 and the reference terminal of the voltage regulator block N2.

### Claim 10 (depends on 1)

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.