|
|
PDF LED2472G Data sheet ( Hoja de datos )
| Número de pieza | LED2472G | |
| Descripción | 24-channels LED driver | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LED2472G (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
LED2472G
24-channels LED driver with error detection and gain control
74)3(3
0/34(3[
Features
• 24 constant current output channels
• Output current: from 4 mA to 72 mA
• 8 x 3 independently controlled channels (RGB)
• Current programmable through external
resistor
• 7-bit global current gain adjustment in two
ranges
• Error detection mode (both open and shorted
LED)
• Programmable shorted LED detection
thresholds
• Auto power-saving / auto wakeup
• Gradual output delay (selectable)
• Supply voltage: 3 V to 5.5 V
• Thermal shutdown and thermal flag
• Up to 30 MHz CLK 4 wires interface
• 20 V current generators rated voltage
Applications
• Full color large displays
• LED signage
• LED screens for indoor and outdoor billboards
Datasheet - production data
Description
The LED2472G is a monolithic, low voltage, low
current power 24-bit shift register designed for
LED panel displays with particular features
oriented to indoor and outdoor LED screen
billboards. The LED2472G guarantees 20 V of
output driving capability, allowing several LEDs to
be connected in series. The device is configured
in 3 groups (red, green and blue) of 8
independently-controlled channels. The LED
current can be separately regulated for each color
within the range from 4 mA to 72 mA. This range
is divided into two sub-ranges and the current can
be adjusted within each range in 64 steps of
resolution (6 bits per color). A single external
resistor is required. All the controls and the shift
register data are accessible via serial interface. A
single 24-bit configuration register is used to
choose features and settings to fit the application.
The LED failure detection circuit checks 3
different conditions that can occur at the output
line: short to GND, short to LED power supply rail
or open channel. The auto power shutdown and
auto power-on feature (selectable) allows the
device to save power without any external
intervention. Thermal management includes
overtemperature flag and the output thermal
shutdown (170 °C). The high clock frequency of
up to 30 MHz makes the device suitable for high
data rate transmission. A selectable gradual
output delay reduces the inrush current. The
supply voltage ranges from 3 V and 5.5 V.
Table 1. Device summary
Order code
Package
Packaging
LED2472GBTR TQFP48-EP
Tape and reel
LED2472GQTR MLPQ40-EP 5x5
April 2014
This is information on a product in full production.
DocID024620 Rev 3
1/39
www.st.com
39
1 page  
LED2472G
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Pinout for TQFP48EP (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pinout for MLPQ40 (top view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Timing for clock, serial-in, serial-out, latch enable and outputs . . . . . . . . . . . . . . . . . . . . . 15
OE and Outputs timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
LED2472G simplified block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Input terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Data input time diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Digital key timing diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Configuration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SDO Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Gradual delay on first four channels of RED color group . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Different color sequence in data loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Iout vs. gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
External resistor to connect to ISET pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Error detection process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
LE high for 14 CLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Typical dropout voltage vs. output current (only one channel ON) . . . . . . . . . . . . . . . . . . . 31
TQFP48-EP package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
TQFP48-EP recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MLPQ40-EP 5x5 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
MLPQ40-EP 5x5 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
DocID024620 Rev 3
5/39
5 Page 
LED2472G
Electrical characteristics
Symbol
Table 5. Electrical characteristics (continued)
Parameter
Test conditions
Min.
%/ΔVOUT
Output current vs. output
voltage regulation(3)
%/ΔVDD
Output current vs. supply
voltage regulation(4)
Rup
Rdw
Rext
Pull-up resistor for OE pin
Pull-down resistor for LE pin
External current setup
resistance
IDD1
Supply current (OFF)
IDD2
IDD1
Supply current (ON)
IDD2
IDD
Supply current (autoOFF)
(AutoOFF)
SDE1
SDE2
ODC
LED short detection voltage
LED open detection current
Vo from 1.2 V to 3 V; (Io = 61
mA)
CFG-0 = CFG-1 = CFG-2 = “1”
Vdd from 3 V to 5.5 V
Vo = 1.2 V; (Io = 61 mA)
CFG-0 = CFG-1 = CFG-2 = “1”
No data transfers,
all outputs OFF,
CFG-0 = CFG-1 = CFG-2 = “0”
GRG = “0”; CFG-6 = “0”
No data transfers,
all outputs OFF,
CFG-0 = CFG-1 = CFG-2 = “1”
CFG-6 = “0”
No data transfers,
all outputs ON,
CFG-0 = CFG-1 = CFG-2 = “0”
GRG = “0”
No data transfers,
all outputs ON,
CFG-0 = CFG-1 = CFG-2 = “1”
All output OFF
CFG-6 = “1”
CFG-3 = CFG-4 = CFG-5 = “0”
CFG-3 = CFG-4 = CFG-5 = “1”
-
-
400
-
-
-
Typ. Max. Unit
±0.2 -
%/V
±1 -
500 650
kΩ
100
8
mA
16
8
mA
15
200 500 µA
2.0
3.0
0.5 IOL
V
DocID024620 Rev 3
11/39
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet LED2472G.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LED2472G | 24-channels LED driver | STMicroelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |