THAB0022_THL3504_Rev.1.00_E_Brief
THL3504
24-channel Constant Current LED Driver with LVDS Interface
DESCRIPTIONS
The THL3504 is an LED driver with 24 channel constant
current sink outputs. The constant current values for
three output groups are determined by external resistors.
T h e e m b e d d e d o sc i l l a to r a n d P W M c o n t r o l l e r
individually generates 256-step brightness set by the
dedicated registers for each channel.
The serial interface of 2-pair LVDS lines (clock and
data) features high-level noise tolerance, high-speed, and
long-distance transmission.
The LVDS allowing cascaded and multidrop connection
offers the maximum flexibility for designers to place and
connect LED drivers.
The simple and one-way communication protocol is
easily-controlled and requires less CPU resources.
FEATURES
< Driver part >
- Constant Current Output: 24 channels
- Output Sink Current: up to 40mA/ch
- Output voltage: up to 40V
- Individual Brightness Control: 256 steps
- Group Brightness Control: 64 steps
- Output disable/enable
< Serial interface part >
- 2-pair Serial LVDS Input or 3-wire Serial CMOS Input
up to 10Mbps
- Bridge Function Converting 3-wire Serial
CMOS Input to 2-pair Serial LVDS Output
- Repeater function of 2-pair Serial LVDS Input / Output
with Waveform and Timing Correction
- Device Address Selection up to 62 addresses
- General call to all devices
Protection Circuits
UVLO, Short Circuit Protection, Thermal Shutdown
Supply Voltage: 3.0~5.5V
Package: QFN 48-pin Exposed Pad
APPLICATIONS
Amusement
LED Backlight
LED Display
Digital Signage
Illumination
Block Diagram
OUT0~OUT7
REXT0
REXT1
REXT2
Registers
Address
Data
LVDS Output
SCL
OUT8~OUT15 OUT16~OUT23
Current Sink
Constant
Current
Generator
Current Sink
Current Sink
Oscillator
PWM Controller
A0~A5
SCL_INp
SCL_INn
SDA_INp
SDA_INn
LVDS Input
Input Logic
SCL_OUTp
SCL_OUTn
SDA
Re-timing
SCK SCL
CSn SDA
SI
SDA_OUTp
SDA_OUTn
MODE
3-wire to 2-wire
conversion
Copyright©2012 THine Electronics, Inc.
1
THine Electronics, Inc.
TMT [ TAIWAN MEMORY TECHNOLOGY ]
