UC384XA-BW Current Mode PWM Controller
(UC3842A-BW/ 43A-BW/ 44A-BW/ 45A-BW)
SCR must be selected for a holding current of less than 0.5mA.
The simple two transistor circuit can be used in place of the SCR as shown.
Figure 5. Latched Shutdown
Figure 6. Error Amplifier Compensation
5