阅读说明：本技术 一种采用电感串联方式的led电路及其实现方法 (LED circuit adopting inductor series connection mode and implementation method thereof ) 是由 陈金亮 王文斌 黄志英 朱忠有 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种采用电感串联方式的LED电路,贴片芯片U1的4脚分别与贴片整流桥堆BD1的3脚以及输出端LED+连接,至少两个贴片电感L串联后一端分别与贴片芯片U1的5脚、6脚和9脚连接,另一端与输出端LED-连接；本发明还公开了一种采用电感串联方式的LED电路的实现方法。本发明通过至少两个贴片电感串联的方式实现电路导通,降低了单个材料成本,并且大大的提升了生产效率；本发明通过至少两个贴片电感串联来实现电路的能量装换,串联起来后的等效电感在开关开通时储能,在开关关断时给负载续流；本发明通过至少两个贴片电感串联与贴片电解电容C3组成二阶滤波,从而输出相对稳定的电压和电流。(The invention discloses an LED circuit adopting an inductor series connection mode, wherein 4 pins of a chip-mounted device U1 are respectively connected with 3 pins of a chip-mounted rectifier bridge stack BD1 and an output end LED +, one end of at least two chip-mounted devices L after being connected in series is respectively connected with 5 pins, 6 pins and 9 pins of a chip-mounted device U1, and the other end of each chip-mounted device L is connected with the output end LED-; the invention also discloses a realization method of the LED circuit adopting the inductor series connection mode. The circuit is conducted in a mode that at least two patch inductors are connected in series, so that the cost of a single material is reduced, and the production efficiency is greatly improved; the energy conversion of the circuit is realized by connecting at least two patch inductors in series, the equivalent inductor after the series connection stores energy when the switch is switched on, and the equivalent inductor performs follow current on the load when the switch is switched off; according to the invention, at least two patch inductors are connected in series to form second-order filtering with the patch electrolytic capacitor C3, so that relatively stable voltage and current are output.)

1. The utility model provides an adopt LED circuit of inductance series connection mode which characterized in that: including paster chip U1, rectifier bridge pile BD1, output LED + and output LED-, wherein, 4 feet of paster chip U1 are connected with 3 feet and output LED + of paster rectifier bridge pile BD1 respectively, and two at least paster inductances L establish ties back one end and are connected with 5 feet, 6 feet and 9 feet of paster chip U1 respectively, and the other end is connected with output LED-.

2. The LED circuit of claim 1, wherein the LED circuit comprises: 2 feet of the patch rectifier bridge stack BD1 are connected with a zero line N, 1 foot of the patch rectifier bridge stack BD1 is connected with a patch fuse F1, the other end of the patch fuse F1 is connected with a live line L, and 4 feet of the patch rectifier bridge stack BD1 are grounded.

3. The LED circuit of claim 2, wherein the LED circuit comprises: the 3 pins of the patch rectifier bridge stack BD1 are respectively connected with a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2, and the other ends of the patch electrolytic capacitor C1 and the patch electrolytic capacitor C2 are grounded.

4. The LED circuit of claim 3, wherein the LED circuit comprises: the 2 feet of the chip U1 are connected with the resistor R1, the other end of the resistor R1 is grounded, and the 1 foot of the chip U1 is grounded.

5. The LED circuit of claim 4, wherein the LED circuit comprises: the 8 pins of the chip U1 are respectively connected with a sampling resistor RS1, a sampling resistor RS2 and a sampling resistor RS3, and the other ends of the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3 are grounded.

6. The LED circuit of claim 5, wherein the LED circuit comprises: the 5 feet, the 6 feet and the 9 feet of the chip-mounted device U1 are all connected with a diode D1, the other end of a diode D1 is connected with the 4 feet of the chip-mounted device U1, a chip electrolytic capacitor C3 is connected between an output end LED + and an output end LED-, and a discharge resistor R2 and a discharge resistor R3 are connected in series and then connected between the output end LED + and the output end LED-.

7. The LED circuit of claim 6, wherein the LED circuit comprises: the 5 pins, the 6 pins and the 9 pins of the chip-on-chip U1 are respectively connected with a chip inductor L1, the other end of the chip inductor L1 is connected with a chip inductor L2, and the other end of the chip inductor L2 is connected with an output end LED-.

8. The method for implementing the LED circuit in the inductive series mode according to any one of claims 1 to 7, comprising the following steps:

the first step, pins 1 and 2 of a patch rectifier bridge stack BD1 are connected with a mains supply, pin 1 of a rectifier bridge stack BD1 is connected with a live wire L through a patch fuse F1, and an alternating current voltage is integrated into a direct current voltage through a rectifier bridge stack BD 1;

smoothing the rectified filtering direct current voltage by using a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2;

thirdly, 4 pins of the chip U1 supply power to the chip, and after the chip U1 is started, the on-off state of a switch tube in the chip is controlled through internal logic, so that the energy storage and the energy discharge of the chip inductor L1 and the chip inductor L2 are adjusted;

the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3 are used for adjusting the output current of the chip U1 so as to control the output power;

fifthly, at least two chip inductors L are connected in series to serve as main inductors of the circuit, and a chip electrolytic capacitor C3 serves as an output electrolytic capacitor and is used for filtering to guarantee the stability of output voltage;

and sixthly, the discharge resistor R2 and the discharge resistor R3 provide a discharge path for the output circuit.

9. The method of claim 8, wherein the method further comprises: the more than two chip inductors L are connected in series to generate magnetic flux leakage, when the two chip inductors are close to each other, the magnetic flux leakage generates mutual inductance between the two chip inductors, a magnetic field generated by a first inductive circuit can excite a second inductive circuit, and when two currents interact through the magnetic field, the generated currents generate mutual excitationBy mutual inductance L_MDetermining:

10. The method of claim 9, wherein the method further comprises: a pin 2 of the patch rectifier bridge stack BD1 is connected with a zero line N, a pin 1 of the patch rectifier bridge stack BD1 is connected with a patch fuse F1, the other end of the patch fuse F1 is connected with a live line L, a pin 4 of the patch rectifier bridge stack BD1 is grounded, a pin 3 of the patch rectifier bridge stack BD1 is also connected with a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2 respectively, the other ends of the patch electrolytic capacitor C1 and the patch electrolytic capacitor C2 are grounded, a pin 2 of the patch chip U1 is connected with a resistor R1, the other end of the resistor R1 is grounded, a pin 1 of the patch chip U1 is grounded, a pin 8 of the patch chip U1 is connected with a sampling resistor RS1, a sampling resistor RS2 and a sampling resistor RS3 respectively, the other ends of the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3 are grounded, a pin 5, a pin 6 and a pin 9 of the patch chip U1 are connected with a diode D1, the other end of the patch D1 is connected with a pin U1, and an LED chip 1 + C1 is connected with an output, the discharging resistor R2 and the discharging resistor R3 are connected in series and then connected in parallel between an output end LED + and an output end LED-, a pin 5, a pin 6 and a pin 9 of the chip U1 are respectively connected with the chip inductor L1, the other end of the chip inductor L1 is connected with the chip inductor L2, and the other end of the chip inductor L2 is connected with the output end LED-.

Technical Field

The invention belongs to the technical field of LED lamps, and particularly relates to an LED circuit adopting an inductor series connection mode and an implementation method thereof.

Background

With the application of the LED lamp becoming more and more extensive, the competition that leads to because the maturity of market is constantly upgraded, and the cost pressure is bigger and bigger, more and more trade companies adopt DOB integration scheme, have following several shortcomings:

1. the large inductor is introduced in the single-circuit scheme for realization, so that full surface mounting cannot be realized, the production efficiency is low, and the cost is high;

2. the multi-circuit scheme realizes high power, and at the moment, the device is more, the efficiency is low, and the material and manufacturing cost is high.

Disclosure of Invention

The present invention is directed to an LED circuit using series connection of inductors to solve the above problems. The LED circuit adopting the inductor series connection mode has the characteristic of enabling an LED module to realize full-surface-mount production.

The invention also aims to provide a realization method of the LED circuit adopting the inductor series connection mode.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an adopt LED circuit of inductance series connection mode, includes paster chip U1, rectifier bridge heap BD1, output LED + and output LED-, wherein, 4 feet of paster chip U1 are connected with 3 feet and output LED + of paster rectifier bridge heap BD1 respectively, and two at least paster inductance L establish ties back one end and are connected with 5 feet, 6 feet and 9 feet of paster chip U1 respectively, and the other end is connected with output LED-.

In the invention, further, pin 2 of the patch rectifier bridge stack BD1 is connected with the neutral line N, pin 1 of the patch rectifier bridge stack BD1 is connected with the patch fuse F1, the other end of the patch fuse F1 is connected with the live line L, and pin 4 of the patch rectifier bridge stack BD1 is grounded.

In the invention, the 3 pins of the patch rectifier bridge stack BD1 are further connected with a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2 respectively, and the other ends of the patch electrolytic capacitor C1 and the patch electrolytic capacitor C2 are grounded.

In the invention, the pin 2 of the chip U1 is connected to the resistor R1, the other end of the resistor R1 is grounded, and the pin 1 of the chip U1 is grounded.

In the invention, the 8 pins of the chip U1 are respectively connected with the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3, and the other ends of the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3 are grounded.

In the invention, the 5 pin, the 6 pin and the 9 pin of the chip U1 are all connected with the diode D1, the other end of the diode D1 is connected with the 4 pin of the chip U1, the chip electrolytic capacitor C3 is connected in parallel between the output end LED + and the output end LED-, and the discharge resistor R2 and the discharge resistor R3 are connected in series and then connected in parallel between the output end LED + and the output end LED-.

In the invention, the 5 pin, the 6 pin and the 9 pin of the chip U1 are respectively connected with the chip inductor L1, the other end of the chip inductor L1 is connected with the chip inductor L2, and the other end of the chip inductor L2 is connected with the output terminal LED-.

Further, the method for implementing the LED circuit using the inductor series connection mode includes the following steps:

the first step, pins 1 and 2 of a patch rectifier bridge stack BD1 are connected with a mains supply, pin 1 of a rectifier bridge stack BD1 is connected with a live wire L through a patch fuse F1, and an alternating current voltage is integrated into a direct current voltage through a rectifier bridge stack BD 1;

smoothing the rectified filtering direct current voltage by using a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2;

thirdly, 4 pins of the chip U1 supply power to the chip, and after the chip U1 is started, the on-off state of a switch tube in the chip is controlled through internal logic, so that the energy storage and the energy discharge of the chip inductor L1 and the chip inductor L2 are adjusted;

the sampling resistor RS1, the sampling resistor RS2 and the sampling resistor RS3 are used for adjusting the output current of the chip U1 so as to control the output power;

fifthly, at least two chip inductors L are connected in series to serve as main inductors of the circuit, and a chip electrolytic capacitor C3 serves as an output electrolytic capacitor and is used for filtering to guarantee the stability of output voltage;

and sixthly, the discharge resistor R2 and the discharge resistor R3 provide a discharge path for the output circuit.

In the invention, further, the method for implementing the LED circuit adopting the inductor series connection mode comprises more than two chip inductorsThe L series connection can generate magnetic flux leakage, when the two chip inductors are close to each other, the magnetic flux leakage generates mutual inductance between the two chip inductors, a magnetic field generated by the first inductor circuit can excite the second inductor circuit, and when the two currents interact through the magnetic field, the generated voltage is excited by the mutual inductance L_MDetermining:

where V2 is the error voltage injected into the second inductor circuit, and I1 is the current flowing through the chip inductor in the first inductor circuit, the inductor pitch is not less than 5mm when the chip inductors are arranged.

Further, in the invention, the method for implementing the LED circuit using the inductor series connection mode includes connecting pin 2 of a patch rectifier bridge stack BD1 with a neutral line N, connecting pin 1 of the patch rectifier bridge stack BD1 with a patch fuse F1, connecting the other end of the patch fuse F1 with a live line L, grounding pin 4 of the patch rectifier bridge stack BD1, connecting pin 3 of the patch rectifier bridge stack BD1 with a patch electrolytic capacitor C1 and a patch electrolytic capacitor C2 respectively, grounding the other ends of the patch electrolytic capacitor C1 and the patch electrolytic capacitor C2, connecting pin 2 of the patch chip U1 with a resistor R1, grounding the other end of the resistor R1, grounding pin 1 of the patch chip U1, connecting pin 8 of the patch chip U1 with a sampling resistor RS1, a sampling resistor RS2 and a sampling resistor RS3 respectively, grounding the sampling resistor RS1, the sampling resistor RS2 and the other end of the sampling resistor RS3, and connecting pins 5, 6 and 1D 9 of the patch chip U4628 with a diode, the other end of the diode D1 is connected with the 4 feet of the chip U1, a chip electrolytic capacitor C3 is connected between the output end LED + and the output end LED-, the discharge resistor R2 and the discharge resistor R3 are connected in series and then are also connected in parallel between the output end LED + and the output end LED-, the 5 feet, the 6 feet and the 9 feet of the chip U1 are respectively connected with a chip inductor L1, the other end of the chip inductor L1 is connected with the chip inductor L2, and the other end of the chip inductor L2 is connected with the output end LED-.

Compared with the prior art, the invention has the beneficial effects that:

1. the components are orderly arranged on the PCB in a surface mount mode, so that the LED module can realize full surface mount production;

2. the circuit is conducted in a mode that at least two patch inductors are connected in series, so that the cost of a single material is reduced, and the production efficiency is greatly improved;

3. the energy conversion of the circuit is realized by connecting at least two patch inductors in series, the equivalent inductor after the series connection stores energy when the switch is switched on, and the equivalent inductor performs follow current on the load when the switch is switched off;

4. according to the invention, at least two patch inductors are connected in series to form second-order filtering with the patch electrolytic capacitor C3, so that relatively stable voltage and current are output.

Drawings

FIG. 1 is a schematic diagram of the circuit structure of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.