Self-adaptive LED fluorescent lamp

A self-adaptive LED fluorescent lamp, comprising a housing (9), a PCB (10) and two lamp caps (11), the housing (9) comprising a lampshade (12) and a radiator (13) that are fastened with each other, each one of the two lamp caps (11) being sleeved on two sides of the housing (9), one or more LED lamp sets (15) and LED driving control units (16) being arranged on the PCB (10), a heat conductive double-sided silicone tape (14) being stuck between the PCB (10) and the radiator, the LED driving control unit (16) comprising an input signal module (1), a protection module and a rectifier filter module (4), wherein the LED driving control unit (16) further comprises a voltage detection module 5 arranged behind the rectifier filter module (4) to detect and judge the voltage, an intelligent switching module (6) connected with the voltage detection module (5) to achieve intelligent switchover of the LED lamps, and a linear constant current module (7) connected with the intelligent switching module (6);

• the voltage detection module (5) comprises a first resistor (R5) and a second resistor (R6), which are connected between a positive output end and a negative output end of the rectifier filter module (4) for voltage division, and a first capacitor C3 connected with the second resistor (R6) in parallel;
• the intelligent switching module (6) comprises a first relay (S1), a second relay (S2) and a field effect transistor (Q), a grid end G of the field effect transistor (Q) is connected with a common end of the first resistor (R5) and the second resistor (R6), a drain end D of the field effect transistor (Q) is connected with a negative end (VCC−) of the second relay (S2), a source end S of the field effect transistor (Q) is connected with a negative output end of the rectifier filter module (4), the output of the intelligent switching module (6) is connected with one or more LED lamp sets (15), in each lamp set (15), one or more LED lamps are connected in series, and each LED lamp is connected with one or more compensation resistors (R) in series;
• and, the linear constant current module (7) comprises two IC linear driving chips, the input end (IN) of each of the IC linear driving chips is connected with a second normally open end (OFF2) of the second relay (S2), and the output end (OUT) thereof is connected with the negative output end of the rectifier filter module (4).