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Analog Devices LT3746EUHH | Demoboard DC1406A
LT3746EUHH Demo Board | 32-Channel 20mA LED Driver (x3 for RGB), 9V ≤ VIN ≤ 40V, VLED up to 4.2V @ 20mA
Overview
| Topology | Buck Converter |
| Input voltage | 9-40 V |
| Output 1 | 4.2 V |
| Output 2 | 3 V |
| IC revision | 2 |
Description
Demonstration circuit 1406A features the LT®3746, 32-channel 20mA LED driver with buck controller and serial interface. Each channel has an individually adjustable 12-bit (4096-step) grayscale PWM dimming control and a 6-bit (64-step) dot correction current adjustment. Both dimming control and current adjustment are accessible via a 30MHz cascadable serial data interface. Individual open/short LED and overtemperature flags are sent back during status read-back.
Three LT3746’s are connected in series to control 32 RGB LEDs stuffed on the demo board. Each IC drives a separate color. The evaluation software installed in a host computer communicates with the DC1406A via the interface board DC590B, an USB serial controller.
The LT3746 data sheet gives a complete description of the part, its operation and application information. The datasheet must be read in conjunction with this quick start guide for working on or modifying the demo circuit 1406A.
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | Size | Version | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744778115 | SPEC | 9 files | WE-PD SMT Power Inductor | 15 | 2.25 | 1.75 | 130 | 7332 | Standard |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | L (µH) | IRP,40K (A) | ISAT (A) | RDC max. (mΩ) | Size | Version | Samples |
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