When the output reaches the voltage feedback threshold set by Ul and VRl, the optocoupler turns on. Any further increase in the power supply output voltage results in the Ul transistor c urrentincreasing, whichincreases the percentage ofthe reflected voltage appearing across Rl. The resulting increase in the LinkSwitch CONTROL current reduces the duty cycle according to Figure 4 and therefore,maintains the outp ut voltage regulation.
| | | | Ratings | |
| Parameter | Symbol | Conditions | min | typ | max | Unit |
| Collector Cutoff Current | ICBO | VCB=(-)80V, IE=O | | | 01 | mA |
| Emitter Cutoff Current | IEBO | VEB=(-)4V, IC=O | | | 01 | mA |
| | | | | | |
