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Texas Instruments TPS40170 | Demoboard PMP6867
9V - 32V input to -28V/1.5A negative output buck-boost LED current regulator
Overview
| Topology | Buck-Boost Converter |
| Input voltage | 9-32 V |
| Output 1 | -28 V / 1.5 A |
| IC revision | C |
Description
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.
More information
Products
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT Flat Wire High Current Inductor, 33 µH, 8.7 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance33 µH | Performance Rated Current8.7 A | Saturation Current @ 10%8 A | Saturation Current @ 30%9 A | DC Resistance21.7 mΩ | Self Resonant Frequency9.5 MHz | MaterialMnZn |