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Overview
| Topology | Buck Converter |
| Input voltage | 7-30 V |
| Switching frequency | 270-330 kHz |
| Output 1 | 6.05 V / 12 A |
| IC revision | A |
Description
Demonstration circuit 1930A is a high current synchronous inverting buck-boost LED driver featuring the LT®3744. The unique drive stage used on the LT3744 allows the anodes of three LEDs to be connected together for better heat sinking in both the step-down configuration and the inverting buck-boost configuration. The pros and cons of each configuration can be found in the data sheet. This demonstration circuit 1930A is for customers to test the inverting buck-boost configuration. The step-down configuration is shown in a separate demonstration circuit DC2339A.
Features
- Ideal for Driving Up to 40A LEDs
- Up to 3000:1 PWM Dimming
- 20:1 Analog Dimming
- ±3% Current Regulation Accuracy
- ±3% Voltage Regulation Accuracy
- Unique Inverting Buck-Boost Topology AllowsGrounded Heat Sink to Be Used for RGB LEDs
- 3.3V to 36V Input Voltage Range
- Peak Current Mode with DC LED Current Sensing
- Open and Shorted LED Protection and Fault Reporting
- Floating LED Driver Allows Single Power Solution
- Drive Multicolor LEDs or Single LED with ThreeDifferent Regulated Currents
- Thermally Enhanced 5mm × 6mm QFN 36-LeadPackage
Typical applications
- LED Driver for DLP Projectors / Heads-Up Displays / High Power LED