Isolated Secondary-Side Overvoltage Protection Using Opto-emulators
Example Isolated Secondary-Side Overvoltage Protection Circuit- Opto-emulators are pin-to-pin drop-in replacements for traditional optocoupler solutions
- Analog transistor output opto-emulators can be used to help monitor power supplies for overvoltage events
- In this circuit, the
opto-emulator protects the controller from harmful high-voltage transients
- This allows the controller to safely monitor the power supply for overvoltage events
- The breakdown voltage of the Zener diode is used to set the voltage threshold at which the controller can detect an overvoltage event
- [FAQ] What are the benefits of Opto-emulators vs. Optocouplers? TI E2E support forums
- [FAQ] Opto-emulators - Top Questions, Answered TI E2E support forums
- Opto-emulators explained: Why you should upgrade your optocoupler technology
- Opto-emulators | TI.com
Need additional assistance? Ask our engineers a question on the TI E2E™ Isolation Support Forum.
| Catalog Part Number |
Automotive Part Number | Input Type | Output Type | VF (MAX) | CTR | Pin-to-Pin Optocouplers |
|---|---|---|---|---|---|---|
| ISOM8110 | ISOM8110-Q1 | DC Input | Open Collector | 1.4V | 100% to 155% | HCPL-181 ACPL-217 LTV356T LTV357T TLP185 TLP181 PS2701A PS2811-1 EL816 EL3H7 and more |
| ISOM8111 | ISOM8111-Q1 | 1.4V | 150% to 230% | |||
| ISOM8112 | ISOM8112-Q1 | 1.4V | 255% to 380% | |||
| ISOM8113 | ISOM8113-Q1 | 1.4V | 375% to 560% | |||
| ISOM8115 | ISOM8115-Q1 | Bidirectional DC Input |
1.5V | 100% to 155% | ||
| ISOM8116 | ISOM8116-Q1 | 1.5V | 150% to 230% | |||
| ISOM8117 | ISOM8117-Q1 | 1.5V | 255% to 380% | |||
| ISOM8118 | ISOM8118-Q1 | 1.5V | 375% to 560% |
To find a pin-to-pin alternative to
the optocouplers in your design, search TI’s cross
reference tool.
For more
opto-emulators, browse through the online parametric tool.
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