STLED524 datasheet(1/72 Pages) STMICROELECTRONICS

部件名	STLED524

功能描述	Intelligent matrix LED display driver

PDF	72 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 72 page

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

April 2014

DocID026217 Rev 1

1/72

72

STLED524

Intelligent matrix LED display driver

Datasheet

- preliminary data

Features

• Operating input voltage range from 2.7 V to

5.5 V

• 5x24 LED matrix driver

• Adjustable luminance separately for each LED

thanks to internal registers in 255 steps

• Internal registers store 2 patterns

• 4-way scroll function with the possibility to lock

column data

• PWM dimming in 255 steps

• Adjustable blanking time

• Automatic slope function

• Cycle time and slope time adjustable for each

dot separately

• SPI interface

• Integrated step-up converter with adjustable

output voltage

• Integrated LDO with 3.1 V output @ 80 mA

• Boost efficiency 92% at 350 mA

• 2.4 MHz switching frequency

• CSP 56 bumps 0.4 mm pitch 3.4x3.0 mm

Applications

• Appliance user interfaces

• Display driver for handheld units

Description

The STLED524 is a 5x24 dot matrix LED display

driver. It can drive each dot with a current up to 20

mA. Rows of the matrix are multiplexed. Each

LED in a row is driven by a separate low-side

current mirror. Current regulators are supplied by

an integrated boost DC-DC converter. Its output

voltage can be adjusted by the internal register to

optimize efficiency according to the type of LEDs

(their forward voltage). This reduces current

mirror power dissipation and improves overall

efficiency. The STLED524 also includes an

internal LDO regulator, which can provide a

supply voltage for an additional circuitry.

Maximum current, provided by each current

mirror, is adjusted by RSET resistor. Current of

each LED (dot) can be dimmed in 255 steps due

to settings of internal registers.

The STLED524 features PWM dimming in 255

steps. Automatic slope function is also supported.

Cycle time and slope time can be adjusted for

each LED (dot) separately.

Two patterns can be stored in internal registers.

The automatic scrolling of the display content is

possible in 4 ways.

CSP 56 bumps 0.4 mm pitch 3.4x3.0 mm

Table 1. Device summary

Order code

Package

Packaging

STLED524

CSP

Tape and reel

www.st.com

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