|
|
PDF MY9221 Data sheet ( Hoja de datos )
| Número de pieza | MY9221 | |
| Descripción | 12-channel (Support R / G / B x 4) Constant Current LED Driver | |
| Fabricantes | MY-Semi | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MY9221 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
|
No Preview Available !
MY-Semi
MY9221
12-Channel LED Driver With Grayscale
Adaptive Pulse Density Modulation Control
General Description
The MY9221, 12-channels (R/G/B x 4) c o n s t a n t
current APDM (Adaptive Pulse Density
M o d u l a t i o n ) LED driver, operates over a 3V ~ 5.5V
input voltage range. The device provides 1 2 open-drain
constant current sinking outputs that are rated to 1 7 V
and delivers up to 60mA of high accuracy current to
each string of LED. The current at each output is
programmable by means of three external current
setting resistors. MY9221 features a 1 0 M H z E M I
r e d u c t i o n data clock input. MY9221 also offers a
2-wire serial interface to send the grayscale data, control
command including 16/14/12/8-bit grayscale selection,
grayscale clock frequency division selection, output
polarity selection for high power LED driving, output Tr/Tf
timing selection, current output waveform selection, and
to realize the internal-latch function. MY9221 provides
adaptive pulse density modulation method to increase the visual
refresh rate up to 1000 Hz @ 16-bit grayscale and reduce the
flickers, and it also provides output current bilateral
processing for EMI reduction. Moreover MY9221 utilizes
clock duty recovery technique and pulse re-timing to help
long distance and multiple cascading applications.
MY9221 provides typical ±1% channel-to-channel
LED current accuracy. Additional features include a
±0.1% regulated output current capability and fast output
transient response. MY9221 is available in a 20-pin QFN
or 24-pin SSOP/TSSOP package and specified over the
-40°C to +85°C ambient temperature range.
Applications
❑ Indoor and Outdoor LED Video Displays
❑ Full Color Mesh Display
❑ Full Color Dot Matrix Module
❑ Architectural and Decorative Lighting
❑ LCD Display Backlighting
Typical Operating Circuits
Features
✦ 3 ~ 5.5V Operating supply voltage
✦ R/G/B x4 Output Channels
✦ 3~60mA@5V Constant current output range
✦ [email protected] Constant current output range
✦ Current setting by 3 external resistors
✦ 17V Rated output channels for long LED strings
✦ ±1%(typ.) LED Current accuracy between channels
✦ ±2%(typ.) LED Current accuracy between chips
✦ 20Mbps(max.) ~ 140 Kbps(min.) data rate for EMI
reduction data transfer[[[pppaaattteeennntttpppeeennndddiiinnnggg]]]
✦ 16 / 14 / 12 / 8 bit grayscale selection
✦ Built-in internal grayscale clock supports refresh rate
>1000Hz@16-bit grayscale, >256KHz@8-bit grayscale
✦ Internal Grayscale clock frequency selection for High
Power LED driving application (min. 33.6KHz)
✦ Grayscale clock source selection (SSOP & TSSOP
only): internal or external
✦ PWM or APDM control selection[[[pppaaattteeennntttpppeeennndddiiinnnggg]]]
✦ Clock duty recovery for cascading application
✦ Schmitt trigger input
✦ Output Current Tr / Tf programmable
✦ Output Current Bilateral Processing for EMI reduction
✦ -40°C to +85°C Ambient temperature range
Order information
Part Package Information
MY9221SA SOP24-236mil-1.0mm
2000 pcs/Reel
MY9221SS SSOP24-150mil-0.635mm 2500 pcs/Reel
MY9221QD QFN20-4mmx4mm-0.5mm 3000 pcs/Reel
TSSOP24-173mil-0.65mm
MY9221TE
(Exposed Pad)
Pin Configuration
2500 pcs/Reel
Nov. 2011 Ver. 1.0
SA / SS / TE
QD
MY-Semi Inc. 0
For pricing, delivery, and ordering information, please contact MY-Semi Inc. at +886-3-560-1668,
1 page  
MY-Semi
MY9221
Electrical Characteristics (VDD = 5.0 V, Ta = 25C unless otherwise noted)
CHARACTERISTIC
SYMBOL
CONDITION
MIN.
TYP.
Input Voltage “H” Level
Input Voltage “L” Level
VIH
CMOS logic level
0.7VDD
VIL
CMOS logic level
GND
Output Leakage Current
ILK VOUT = 17 V
Output Voltage (DO)
VOL
VOH
IOL = 4.8 mA
IOH= 5.3 mA
VDD-0.4
Output Current Skew
(Channel-to-Channel)*1
Output Current Skew
(Chip-to-Chip)*2
dIOUT1
dIOUT2
VOUT = 1.0 V
Rrext = 2340
1
2
Output Current Skew
(Channel-to-Channel)*1
Output Current Skew
(Chip-to-Chip)*2
Output Voltage Regulation*3
Supply Voltage Regulation*4
Supply Current*5
dIOUT3
dIOUT4
VOUT = 1.0 V
Rrext = 19.5 K
% / VOUT
% / VDD
IDD1(off)
IDD2(off)
IDD3(on)
IDD4(off)
IDD5(on)
Rrext = 2340
VOUT = 1 V ~ 3 V
Rrext = 2340
VDD = 3 V ~ 5.5 V
all pins are open
unless VDD and GND
input signal is static
Rrext = 2340
all outputs turn off
input signal is static
Rrext = 2340
all outputs turn on
input signal is static
Rrext = 19.5 K
all outputs turn off
input signal is static
Rrext = 19.5 K
all outputs turn on
1
2
.0.1
0.6
2.40
5.73
5.85
2.84
2.84
MAX.
VDD
0.3VDD
0.1
0.4
UNIT
V
uA
V
3 %
6 %
3 %
6 %
%/V
1
mA
*1 Channel-to-channel skew is defined by the formula below: *3 Output voltage regulation is defined by the formula below:
%
Ioutn
(Iout0 Iout1 ... Iout3 )
1 *100%
% /V
Ioutn (@Voutn 3V ) Ioutn (@Voutn 1V )
Ioutn (@Voutn 3V )
*
100%
3V 1V
4
*2 Chip-to-Chip skew is defined by the formula below:
*4 Supply voltage regulation is defined by the formula below:
% (
(Iout0
Iout1
4
...
Iout3 )
(Ideal
Output
Current)
(Ideal Output Current)
*100%
% /V
Ioutn (@VDD 5.5V ) Ioutn (@VDD 3V )
Ioutn (@Vcc 3V )
* 100%
5.5V 3V
*5 IO excluded.
12-Channel LED Driver with Grayscale APDM Control
Copyright© MY-Semi Inc. 4
5 Page 
MY-Semi
MY9221
Reference Resistor
The constant current values are determined by an external resistor placed between
REXT pin and GND pin. The following formula is utilized to calculate the current value:
Iout(mA)
1.28 * 45.5
Rrext (K)
Where Rrext is a resistor placed between REXT and GND
For example, Iout is 25mA when Rrext=2340Ω and Iout is 3mA when Rrext=19.5 KΩ
Iout(mA)
60
VDD = 5V I-R Curve
50
40
30
20
10
0
0
2
4
6
8 10 12 14 16 18 20 Rext(KΩ)
Iout(mA)
40
VDD = 3.3V I-R Curve
35
30
25
20
15
10
5
0
0 2 4 6 8 10 12 14 16 18 20 Rext(KΩ)
12-Channel LED Driver with Grayscale APDM Control
Copyright© MY-Semi Inc. 10
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet MY9221.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MY9221 | 12-channel (Support R / G / B x 4) Constant Current LED Driver | MY-Semi |
| 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 |