LinkSwitch-TN2TopologyBasic Circuit SchematicKey Features 1. Output referenced to input High-Side 2. Positive output (V ) with respect to -V O IN Buck – FBBP/M 3. Step down – V < V O IN Direct + DS + 4. Low cost direct feedback (±10% typ.) Feedback LinkSwitch-TN2 5. Requires an output load to maintain regulation VINVO PI-7843-031616 1. Output referenced to input FBBP/M 2. Positive output (V ) with respect to -V O IN High-Side DS 3. Step down – V < V + + O IN Buck – LinkSwitch-TN2 4. Optocoupler feedback Optocoupler - Accuracy only limited by reference choice Feedback VVINO - Low cost non-safety rated optocoupler - No pre-load required 5. Minimum no-load consumption PI-7844-031616 + + Low-Side LinkSwitch-TN2 Buck – VVINO Optocoupler Feedback BP/MFB 1. Output referenced to input SD PI-7845-031616 2. Negative output (V ) with respect to +V O IN 3. Step down – V < V O IN 4. Optocoupler feedback + IO - Accuracy only limited by reference choice - Low cost non-safety rated optocoupler Low-Side LinkSwitch-TN2 - No pre-load required Buck – V V IN F + - Ideal for driving LEDs Constant Current LED Driver BP/MFBSD VF PI-7846-031616 R = IO High-Side Buck-Boost – FBBP/M Direct DS Feedback + 1. Output referenced to input VLinkSwitch-TN2VINO 2. Negative output (V ) with respect to +V O IN + 3. Step up/down – V > V or V < V O IN O IN 4. Low cost direct feedback (±10% typ.) PI-7847-031616 5. Fail-safe – output is not subjected to input voltage if the internal power MOSFET fails 300 2 V Ω RSENSE = 6. Ideal for driving LEDs – better accuracy and IO High-Side 2 kΩ temperature stability than low-side buck FBBP/M R Buck-Boost – SENSE IO constant current LED driver Constant + DS 7. Requires an output load to maintain regulation Current LED LinkSwitch-TN2V 10 µF IN 100 nF Driver 50 V PI-7849-031616 Table 2. Common Circuit Configurations using LinkSwitch-TN2. (continued on next page) 7 Rev. M 10/20 www.power.com Document Outline Product Highlights Description Output Current Table Pin Functional Description LinkSwitch-TN2 Functional Description Applications Example Key Application Considerations Quick Design Checklist Absolute Maximum Ratings Thermal Resistance Key Electrical Characteristics Typical Performance Characteristics PDIP-8C (P Package) SMD-8C (G Package) SO-8C (D Package) PDIP-8C (P) and SMD-8C Package Marking SO-8C (D) Package Marking MSL Table ESD and Latch-Up Part Ordering Information