High-linearity TRIAC dimming compatible LED drive circuit
A technology of LED driving and high linearity, applied in the application of electrical components, semiconductor lamps, etc., can solve the problems of delay, non-monitoring of output current, jumping and shaking, etc., to reduce switching loss, expand the selection space, and reduce the size of the device. small effect
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[0028] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.
[0029] Such as Figure 1 to Figure 2 As shown, a high linearity TRIAC dimming compatible LED drive circuit includes a dimming input module 101 coupled to each other, an ignition module 102, a bridge stack and a filter module 103, a DC / DC converter 104, a dummy load module 105, a PWM Control module 106, switch tube drive module 107, MCU intelligent control module 108, FB pin voltage linear adjustment module 109 and FB pin compensation module 110, also connected between the DC / DC converter 104 and the switch tube drive module 107 There is a high frequency switching device Q3.
[0030] The dimming input module 101 includes a TRIAC dimmer and a safety resistor RF1 connected in series before the TRIAC dimmer on the AC input L line.
[0031] The ignit...
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