A power supply circuit for a power drive chip
A power supply line, power drive technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as the breakdown of the transistor Q, and achieve the effect of ensuring normal operation, reducing maintenance costs, and avoiding the danger of breakdown
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[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0012] Such as figure 2 As shown, the power supply circuit of the power drive chip in this embodiment includes a startup circuit 1, a voltage stabilizing circuit 2 and a power supply circuit 3, the startup circuit 1 includes a first resistor R1 and a first capacitor C1, and the voltage stabilizing circuit 2 includes a triode Q , a voltage regulator tube D1, a second resistor R2 and a third resistor R3, the power supply circuit 3 includes an inductor L, a diode D2 and a second capacitor C2; one end of the first resistor R1 is connected to an external load power supply, and the other end of the first resistor R1 is respectively connected to the chip The power input pin of the IC, the first end of the first capacitor C1 and the emitter end of the transistor Q, the ground pin of the chip IC is connected to the ground terminal GND; the base end of...
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