YX8018 TO-94 8018 TO94 Solar Light Joule Thief DC DC Converter Booster IC 1.25V LED Control IC
 
Model: YX8018; Operating voltage: 1.2V; Output current: 30mA; Package Type: TO-94.
YX8018 is design for solar LED light. Apply for solar garden light, solar string light, LED driver.
It is driven by a switching circuit, optical switch circuit, over dischargeprotection circuit, the internal integration of short based diodes and other circuit.
The YX8018 transistor usual driver found in solar lights.
This solar light transistor can aid in the repair and replacement of old / faulty solar lights
 
Resources:
1. YX8018 JOULE THIEF SOLAR LED DRIVER