Preliminary
MY9168
Constant Current LED Driver
16-Channel
MY-Semi
With Ghost Image Abatement
General Description
Features
✦ 3.3V ~ 5.0V Operating supply voltage (±10%)
✦ 3~55mA/5V Constant current output range
✦ 3~35mA/3.3V Constant current output range
✦ 16V Rated output channels for long LED strings
✦ ±3% (max.) Current accuracy between channels
✦ ±3% (max.) Current accuracy between chips
✦ ±0.1% Output current regulation capability
✦ 30MHz Clock frequency for data transfer
✦ Current setting by one external resister
✦ Schmitt trigger input
The MY9168 16-channel constant current LED
driver with ghost image abatement is suitable
for multiplexing display system. The device
has wide supply voltage range (3.3V ~ 5.0V) and
provides 16 open-drain constant current sinking outputs
that are rated to 1 6 V and delivers up to 55mA of high
accuracy current to each string of LED. The current at
each output is programmable by means of an external
current-sensing resistor. The MY9168 features a fast
30MHz DCK input, allowing a wide LED dimming (on/off)
range to be implemented. The MY9168 offers a 4-wire
serial interface,
transparent latch. The serial interface allows
microcontroller to configure the output channels using four
inputs (DI, DCK, LAT, and ENB) and data output (DO).
a 16-bit shift register, and a 16-bit
a
✦ Power on reset
a
DO allows multiple drivers to be cascaded and operated
together.
✦ Stagger output delay
✦ Fast current transient response
The MY9168’s on-board pass elements minimize the
need for external components, while at the same time,
providing ±3%(max.) LED current accuracy. Additional
features include a ±0.1% regulated output current capability
✦ Ghost image abatement
✦ Low knee voltage for constant current
✦ High level HBM ESD protection (Iout pin > 8000V)
✦ -40°C to +85°C Ambient temperature range
and fast output transient response
.
The MY9168 is available in a 24-pin SOP/SSOP/QFN
package and specified over the -40°C to +85°C ambient
temperature range.
Applications
Order information
❑ Indoor and Outdoor LED Video Displays
❑ Variable Message Sign (VMS)
Part
Package Information
SOP24-236mil-1.0mm
SSOP24-150mil-0.635mm
MY9168SA
MY9168SS
2000 pcs/Reel
2500 pcs/Reel
3000 pcs/Reel
❑ Dot Matrix Module
❑ Architectural and Decorative Lighting
❑ Industrial Lighting
MY9168QF QFN24-4mmx4mm-0.5mm
❑
LCD Display Backlighting
Typical Operating Circuits
Pin Configuration
VLED
Power
System
DI
DO
DI
DO
MY9168
MY9168
n
1
Controller
DCK
LAT
ENB
Aug. 2013 Ver. 0.4
MY-Semi Inc.
0
For pricing, delivery, and ordering information, pleases contact MY-Semi Inc. at +886-3-560-1668,
or email to INFO@MY-Semi.com.tw or visit MY-Semi’s website at www.MY-Semi.com.tw
