Be used for resonant control circuit and led drive circuit that LED drives
Technical field
The utility model relates to a kind of resonant control circuit, more particularly is meant resonant control circuit and led drive circuit thereof that a kind of LED of being used for drives.
Background technology
In the prior art, because LED has long service life, the characteristics that energy consumption is little have been widely used in lighting field at present, and various high-power LED luminous elements (LED lamp) are applied to various occasions.Yet LED is very high to the requirement of power supply, because the LED illuminating product is directly to utilize electricity network, has a lot of unsettled disturbing factors, needs usually to adopt earlier after the AC/DC conversion, again by after the DC/DC translation circuit, for LED provides driving power.Yet in existing LED driving power, its DC/DC translation circuit lacks effective frequency control system and corresponding components and parts, causes LED driving power stability not high.
Based on the defective of above-mentioned prior art, inventor's innovative design goes out resonant control circuit and the drive circuit thereof that a kind of LED of being used for drives.
The utility model content
The purpose of this utility model is to overcoming resonant control circuit and the drive circuit thereof that the deficiencies in the prior art provide a kind of LED of being used for to drive.
The technology contents that the utility model is used for the resonant control circuit of LED driving is: be used for the resonant control circuit that LED drives, it is characterized in that comprising resonant controller, described resonant controller is the L6599 cake core, described L6599 chip is provided with pin 1~pin 16, described pin 1~pin 16 is respectively the Css end, the DELAY end, the CF end, the RFmin end, the STBY end, the ISEN end, the LINE end, the DIS end, the PFC_STOP end, the GND end, the LVG end, the Vcc end, N.C. hold, the OUT end, HVG end and VBOOT end, described LVG end, HVG end and OUT end connect with the DC/DC translation circuit that is provided with, and described PFC_STOP end connects with the pfc controller that is provided with.
Its further technology contents is: the ISEN end connects with the current detection circuit that is provided with.
Its further technology contents is: the LINE end connects with the input of DC/DC translation circuit.
Its further technology contents is: Rfmin holds the optocoupler ground connection by the feedback circuit that is provided with.
A kind of technology contents that is provided with the led drive circuit of resonant control circuit of the utility model is: a kind of led drive circuit that is provided with resonant control circuit, its feature comprises aforesaid resonant control circuit, the PFC pre-regulating circuit that also comprise power module, connects with power module, the DC/DC translation circuit that connects with the PFC pre-regulating circuit, described DC/DC translation circuit is provided with the control end that connects with resonant control circuit.
Its further technology contents is: also comprise the PFC control circuit that connects with resonant control circuit.
Its further technology contents is: described PFC control circuit comprises L6561, L6562 or L6563 type integrated circuit (IC) chip.
Its further technology contents is: the constant-current control circuit that the output of described DC/DC translation circuit is connected with several LED luminous elements and connects with the LED luminous element, described constant-current control circuit comprises sample resistance and the current-limiting resistance that the negative pole with the LED luminous element is cascaded, the other end ground connection of current-limiting resistance, the other end of sample resistance connects with the negative input end of the operational amplifier that is provided with.
Its further technology contents is: described operational amplifier is the integrated form operational amplifier.
Its further technology contents is: described integrated form operational amplifier is the LM2902 cake core.
The utility model beneficial effect compared with prior art is: the utility model has adopted L6599 type integrated circuit (IC) chip, for led drive circuit provides reliable and effective FREQUENCY CONTROL source, have the stability height, disturb and lack by its led drive circuit that constitutes, adaptable supply frequency wide ranges, applying of it can improve the utilization rate of LED lamp in various illuminating engineerings, has excellent economic and social benefit.
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Description of drawings
Fig. 1 is a kind of circuit block diagram that is provided with the led drive circuit specific embodiment of resonant control circuit of the utility model;
Fig. 2 is a kind of circuit theory diagrams that are provided with the led drive circuit specific embodiment of resonant control circuit of the utility model.
Description of reference numerals
S resonant control circuit 1 resonant controller
2 current detection circuits, 3 feedback circuits
4 power modules, 5 PFC pre-regulating circuits
6 DC/DC translation circuits, 7 PFC control circuits
8 LED luminous elements, 9 constant-current control circuits
Embodiment
In order to more fully understand technology contents of the present utility model, below in conjunction with specific embodiment the technical solution of the utility model is further introduced and explanation, but be not limited to this.
As depicted in figs. 1 and 2, the resonant control circuit S that the utility model is used for the LED driving comprises resonant controller 1, resonant controller 1 is L6599 cake core U2, the L6599 chip is provided with pin 1~pin 16, pin 1~pin 16 is respectively the Css end, the DELAY end, the CF end, the RFmin end, the STBY end, the ISEN end, the LINE end, the DIS end, the PFC_STOP end, the GND end, the LVG end, the Vcc end, N.C. hold, the OUT end, HVG end and VBOOT end, the LVG end, HVG end and OUT end (mainly comprise the switching tube Q8 shown in Fig. 2 with the DC/DC translation circuit that is provided with, the inverter circuit that devices such as Q9 constitute, transformer T1A, and Q18, the high-frequency rectification circuit that Q19 constitutes) connect, the PFC_STOP end connects with the pfc controller that is provided with (U1 as shown in Figure 2).The ISEN end connects with the current detection circuit 2 that is provided with (detecting the electric current after the DC/AC inversion by C23, R44, D14, R62).The LINE end connects with the input (by R10, the R30 that connects among Fig. 2, the voltage that the R48 resistor voltage divider circuit detects input HV) of DC/DC translation circuit.Also comprise feedback circuit 3.
As among Fig. 1 and shown in Figure 2, a kind of led drive circuit that is provided with resonant control circuit of the utility model, comprise aforesaid resonant control circuit S, also comprise power module 4, the PFC pre-regulating circuit 5 that connects with power module 4, the DC/DC translation circuit 6 that connects with PFC pre-regulating circuit 5, DC/DC translation circuit 6 is provided with the control end that connects with resonant control circuit S.Also comprise the PFC control circuit 7 that connects with resonant control circuit S.PFC control circuit 7 mainly is L6561, L6562 or L6563 type integrated circuit (IC) chip.The constant-current control circuit 9 that the output of DC/DC translation circuit 6 is connected with 8 LED luminous elements 8 and connects with LED luminous element 8, constant-current control circuit 9 comprises sample resistance (R77 to R84 as shown in Figure 2) and the current-limiting resistance (R24 as shown in Figure 2, R35, R36, R37, R53, R54, R66 and R67) that the negative pole with LED luminous element 8 is cascaded, the other end ground connection of current-limiting resistance, the other end of sample resistance connects with the negative input end of the operational amplifier that is provided with.In the present embodiment, what operational amplifier adopted is the constant current control that two integrated form operational amplifiers are used for eight LED luminous elements, and as the LM2902 cake core, this chip is provided with four operational amplifiers.
In sum, the utility model has adopted L6599 type integrated circuit (IC) chip, for led drive circuit provides reliable and effective FREQUENCY CONTROL source, have the stability height, disturb and lack by its led drive circuit that constitutes, adaptable supply frequency wide ranges, applying of it can improve the utilization rate of LED lamp in various illuminating engineerings, has excellent economic and social benefit.
The above only further specifies technology contents of the present utility model with embodiment; so that the reader is more readily understood; but do not represent execution mode of the present utility model to only limit to this, any technology of doing according to the utility model is extended or recreation, all is subjected to protection of the present utility model.