Inventronics (Hangzhou), Inc.

Inventronics (Hangzhou) Co., Ltd.

Thinklux (Zhejiang) Lighting Technology Co., Ltd.

Xinke Wu

Guichao Hua

Xiaoli Yao

Liang'an Ge

Lijun Ren

Liangan Ge

Delai Jiang

Congfeng Zhang

Wanyu Tang

Xiaojun Guo

Kun Lang

A multi-path constant current driving circuit. In the multi-path constant current driving circuit, a current sharing transformer (T, T, T, T(n&#x2212;1)) is provided in power supply circuits which are provided with adjacent rectifier and filter units (Z, Z, Z, Zn). A first winding of the current sharing transformer (T, T, T, T(n&#x2212;1)) is connected between a first terminal of a secondary winding of a first power supply circuit and the rectifier and filter unit (Z, Z, Z, Zn) of the first power supply circuit. A second winding of the current sharing transformer (T, T, T, T(n&#x2212;1)) is connected between a first terminal of a secondary winding of a second power supply circuit and the rectifier and filter unit (Z, Z, Z, Zn) of the second power supply circuit. In-phase current flows through the dotted terminal of the first winding and the synonym terminal of the second winding of the current sharing transformer (T, T, T, T(n&#x2212;1)). The current sharing transformer (T, T, T, T(n&#x2212;1)) is used for sharing the current between the power supply circuits which are provided with the adjacent rectifier and filter units (Z, Z, Z, Zn ). The driving circuit is provided with high current sharing efficiency, a small size and a low cost.

Multi-path constant current driving circuit

A drive circuit for realizing accurate constant current of multiple LEDs is disclosed. The drive circuit comprises a high-frequency impulse Alternating Current (AC) power carrying N circuit units with same structure. Each of the circuit unit comprises a rectifier filter circuit, a blocking capacitor Cand two LED loads. The rectifier filter circuit comprises two independent half-wave rectifier circuits, and two filter capacitors. Each of the two half-wave rectifier circuits comprises two diodes connected in series to supply power for the corresponding LED load. The filter capacitor is connected in parallel with the two ends of an LED load respectively, and the blocking capacitor Cis connected in series with the input end of the rectifier filter circuit. The circuit also comprises N&#x2212;1 equalizing transformers, each of which connects in series between two adjacent circuit units. A drive circuit for constant output current of multiple LEDs with high efficient, low cost and great flow equalization is provided in the embodiment of the invention. When the differential voltage of the two LED loads is large, high efficiency can also be achieved.

Drive circuit for realizing accurate constant current of multiple LEDs

A constant current control circuit with multiple outputs for a LED driver, the circuit including a single-output constant current power supply, and multiple output circuits, each output circuit comprising a current sharing circuit, a current sharing control circuit and a LED load. The LED load and the current sharing circuit are in series and form a series loop with a first terminal and a second terminal of the series loop connected to a first output terminal and a second output terminal of the constant current power supply.

Constant current control circuit with multiple outputs for LED driver

A multi-path constant current drive circuit includes a DC/AC converter, a main transformer and at least two rectifying and filtering units. The main transformer includes at least one assistant side winding with a tap; together with the assistant side winding of the main transformer, each of the at least two rectifying and filtering units respectively forms a power supply loop; each power supply loop includes a first rectifying loop and a second rectifying loop, which are relatively used for the rectification of the positive and the negative half-cycle alternating voltage; a current-equalizing transformer is arranged between the adjacent first power supply loop and second power supply loop, the windings of the current-equalizing transformer are respectively in the rectifying loops contained in the first power supply loop and the second power supply loop, thus realizing the current equalization between the different rectifying loops in which the adjacent rectifying and filtering units are contained. The multi-path constant current drive circuit performs a good current equalization, and can reduce the volume of the current-equalizing transformer and decrease the cost.

A LED drive circuit for SCR dimming including an external controller configured to receive AC voltage from a power network to convert the AC voltage to an AC voltage with a lacked phase by phase controlling the voltage through a thyristor, and a LED driver that includes a bridge rectifier configured to shape the AC voltage with the lacked phase output into a unidirectional pulse DC voltage, and a phase angle detecting circuit configured to shape the AC voltage signal output with lacked phase from the external controller into a saw-tooth wave pulse signal.

LED drive circuit for SCR dimming

The invention discloses a hollow, liquid cooling and strip-shaped LED lamp, comprising an LED driver, an LED light source, and LED substrate, a light distributing lampshade, electrical connectors at two ends and a lamp socket. The invention is characterized in that a hollow inner container is set in the light distributing lampshade. The hollow chamber between the hollow inner container and the light distributing lampshade is filled with heat conducting liquid. The LED substrate is immersed in the heat conducting liquid. The invention conducts heat by conduction and convection of the heat conducting liquid, which can obtain good heat radiating effect. Meanwhile, the inner container and the light distributing lampshade form a hollow radiating shell filled with high performance heat conducting liquid, and the hollow radiating shell can be made of light weight materials. Therefore, the radiating shell is light in weight, environmental friendly, durable and low cost. Especially, since the heat conducting liquid fills in the hollow chamber of the hollow radiating shell directly in the invention, the heat radiating effect will be improved and at the same time the volume of the product will not increase.

Hollow, liquid cooling and strip-shaped LED lamp

A current-driven synchronous rectifying drive circuit designed for a T-type voltage doubler rectifier with an energy feedback circuit including a clamp and energy feedback circuit, a high frequency transformer, a current transducer, an energy storage capacitor, an output capacitor, a first and a second synchronous rectifier, and a first drive circuit connected to the first synchronous rectifier and a second drive circuit connected to the second synchronous rectifier.

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Zhejiang, China

Xinke Wu