| Topology | Buck-Boost Converter | 
| Input voltage | 9-32 V | 
| Output 1 | -28 V / 1.5 A | 
| IC revision | C | 
This reference design uses the TPS40170 sync buck controller in a buck-boost converter to regulate the current in a series string of 6 to 8 LEDs (-28V) at up to 1.5A. Efficiency is greater than 93%. The output current can be adjusted with an external control voltage.
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|  | 74435573300 | SPEC | 9 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 33 | 8.7 | 8 | 9 | 21.7 | 9.5 | MnZn | 
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
|  | 74435573300 | SPEC | 
| Samples | 
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples | 
|---|