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Texas Instruments LM5175 | Demoboard PMP10592
LED PWM Dimming Reference Design Using High Efficiency Buck-Boost Converter
Overview
| Topology | Buck-Boost Converter |
| Input voltage | 4.5-42 V |
| Output 1 | 1.1 A |
| IC revision | A |
Description
The reference design contains a complete LM5175 based buck-boost converter and a driver and FET for PWM dimming. This design has been optimized for the 12-V automotive supply rail with support for cold-crank profile based on ISO 7637-2 pulse 4. The design provides 1.1-A constant current output to a string of 8 LEDs.
Features
- Wide VIN 4.5V-42V
- Drive 8 LEDs in series
- 1-A constant current loop
- PWM dimming driver/fet
- 0-100% PWM dimming range
- Meets ISO 7637-2 Pulse 4 (cold-crank)
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74435571500 | SPEC | 8 files | WE-HCI SMT Flat Wire High Current Inductor | 15 | 14.1 | 10.75 | 14 | 9 | 14 | MnZn |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 74435571500 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT,10% (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Material | Samples |
|---|