IC interior voltage-stabilized power supply circuit special for motorcycle igniter

Abstract

The invention relates to an integrated circuit inner stabilized voltage supply circuit special for a motorcycle igniter. The stabilized voltage supply circuit comprises a first filter capacitor, a second filter capacitor, a first resistor and a first diode, wherein the first diode is respectively connected with the first filter capacitor, and connected with the second filter capacitor and an integrated circuit inner stabilized voltage supply through the first resistor; the integrated circuit inner stabilized voltage supply comprises that a zener diode which is connected with the positive electrode of a second diode in the opposite direction; the negative electrode of the second diode is connected with a second resistor and the base of a triode through a third diode; the other end of the second resistor is connected with the emitter of the triode and is grounded; and the collector of the triode is connected with the negative electrode of the zener diode. The inner stabilized voltage supply circuit has the advantages that when voltage pulse generated by a magnetoelectric generator is disturbed by hard pulse, the triode is quickly switched on so that the disturbing pulse is diverted by the triode and does not pass through the zener diode, the second diode and the third diode; therefore, the diodes can not be burned down by heavy current so as to protect the inner stabilized voltage supply circuit.

Description

technical field [0001] The invention relates to an internal stabilizing power supply circuit of a special integrated circuit of a motorcycle igniter, which can avoid circuit damage caused by strong pulses. Background technique [0002] Conventional motorcycle igniter ASIC internal regulated power supply circuit such as figure 1 shown. The voltage pulse generated by the magneto is rectified by the first diode D1 and then limited by the first resistor R1 to charge the second filter capacitor C2. The DC stabilized voltage V1 is composed of the internal voltage stabilized control circuit of the integrated circuit, that is, the sum of the voltages on the Zener diode DZ connected in sequence, the second diode D2, the third diode D3 and the fourth diode D4, That is, V1=V DZ +V D2 +V D3 +V D4 . In an integrated circuit, the Zener diode DZ is realized by the reverse direction of the P-N junction, and the forward voltage at both ends is usually controlled at about 6.9 volts, wh...

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Problems solved by technology

[0003] The high-voltage ignition of the motorcycle igniter tends to generate extremely large interference pulses that are added to the voltage pulses generated by the magneto. Although the first capacitor C1 can filter out most of the interference pulses, there are still a small number of interference pulses that enter the integrated circuit through the first resistor R1. Inside the circuit; since the inside of the integrated circuit usually can only withstand the voltage within 35 volts and limited power consumption (determined by the internal Zener diode and the layout area of ​​the diode), one pin of the internal regulated power supply of the integrated circuit will be damaged due to strong Damaged by pulse (large voltage) interference

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