Linear constant current drive chip and multi-chip parallel LED lighting circuit

Abstract

The invention discloses a linear constant current drive chip and a multi-chip parallel LED lighting circuit, and relates to the LED lighting circuit. The linear constant current drive chip comprises alinear constant current drive circuit, a metal base plate and eight pins; the pins are symmetrically distributed on the two sides of the metal base plate; the pins comprise a first power end, a second power end, at least one intermediate power end arranged on one side of the metal base plate and additional intermediate power ends which are arranged on the other side of the metal base plate and have the same number; the intermediate power ends and the additional intermediate power ends are in one-to-one correspondence according to the same order, and the corresponding intermediate power ends and additional intermediate power ends are connected; the first power end, the intermediate power ends, the second power end and the additional intermediate power ends are sequentially arranged aroundthe metal base plate; when the linear constant current drive chip is used for forming the multi-chip parallel LED lighting circuit, a line does not need to use a jumper, the circuit is simple, and thereliability is high.

Description

technical field [0001] The invention relates to an LED lighting circuit, in particular to a linear constant current drive chip and a multi-chip parallel LED lighting circuit. Background technique [0002] In existing high-power LED lighting drive circuits, the rated power of one linear constant current driver chip usually cannot meet the usage requirements, and it is often necessary to use multiple linear constant current driver chips in parallel to form a multi-chip parallel LED lighting circuit to expand power. [0003] refer to figure 1 , which is an existing multi-chip parallel LED lighting circuit including 3 linear constant current driver chips, including a rectifier circuit, 3 linear constant current driver chips connected in parallel and a series lighting group composed of 3 light emitting diodes connected in series. The rectification circuit is a bridge rectification circuit composed of 4 diodes. The input terminal of the rectification circuit is connected to the m...

AI Technical Summary

Problems solved by technology

However, considering the heat dissipation of the light-emitting diode and the linear constant current driver chip, the multi-chip parallel LED lighting circuit is usually patch-welded on the same single-sided copper-clad aluminum substrate, so that the wire intersection points in the multi-chip parallel LED lighting circuit It needs to be implemented by jumpers, which increases the cost and the area of ​​the circuit board, and at the same time reduces the reliability of the multi-chip parallel LED lighting circuit, which is prone to short circuits

Images