Product	Start up current	Operating Current	Frequency	Effective Current Limit	Features	Package	PDF
SE3900	240μA	450μA	60K	420mA	1.Low Cost Emitter Drive PWM Solution 2.0.13W Standby Power 3.Short Circuit and Over Current Protection 4.Current Mode Operation 5.Available in TO-92	TO92	SE3900.pdf
SE3901	240μA	450μA	60K	420mA	1.Low Cost Emitter Drive PWM Solution 2.0.13W Standby Power 3.Short Circuit and Over Current Protection 4.Current Mode Operation 5.Available in TO-94 6.Internal Zener Diode	TO94	SE3901.pdf