Quick Start Procedure; Hardware Setup - Linear Technology DC1552A Demo Manual

DEMO MANUAL DC1552A

QUICK START PROCEDURE

Demonstration circuit 1552A is easy to set up to evaluate
the performance of the LT8500 and LT3595A. Follow the
procedure for testing a single DC1552A without chaining
multiple boards together.
NOTE: Make sure that the P
exceed 45V. A hot-plugged input above 40V can result in
damage to the IC with input voltage ringing.
1. Connect a panel of LEDs to the output connector P1 of
DC1552A. The LED strings should be between 2 LEDs
per string up to about 32V of LEDs per string. There is
room for 48 strings of LEDs to be connected to a single
DC1552A.
2. Connect the serial data interface to connector P3.

HARDWARE SETUP

2
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DC input voltage does not
VIN
Up to 45V
Input
Supply
48 Pixel LED panel
30mA per pixel
optimized for 8V-32V LED per pixel
Figure 1. Typical Hardware Setup for Testing a Single DC1552A as a 48 Pixel LED Driver
3. With power off, connect the PVIN power supply to the
PVIN and GND connection on P2.
4. Turn the PVIN power supply on.
5. Begin sending and receiving serial data from the serial
interface.
6. Observe the LED string running at the programmed
LED current and the patterns on the LED panel.
In order to tie multiple DC1552A LED drivers together in
a chain, follow the recommended component setup in
Table 1. Repeat the Quick-Start Procedure, but connect
the serial output of one DC1552A PCB to the serial input
of the next in the chain with a cable from the P4 output on
the PCB to the P3 input of the next PCB before power-up.
Solo
Serial
Data
Interface
dc1552af