You can use a dual npn+pnp to build a cheap thyristor (a). When the thyristor fires, the pulses permanently stop, leaving no voltage runaway (b)
| Authors | Christophe Basso |
| Main Document | Article «Bipolars provide safe latch-off against opto failures» |
| Description | Figure 3 |
| File Format / Size | PDF / 11 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Bipolars provide safe latch-off against opto failures»
- Figure 1. A typical current-mode architecture uses an optocoupler as a variable resistor
- Figure 2. In this battery-charger circuit, the primary controllers operate without any auxiliary winding (a). Output-voltage runaway can damage the output capacitors if the condition lasts too long (b)
- Figure 3. You can use a dual npn+pnp to build a cheap thyristor (a). When the thyristor fires, the pulses permanently stop, leaving no voltage runaway (b)
