SN3101
Jan. 2010 P0.5 SI-EN Technology
1
3-Channel RGB LED Driver
Description
The SN3101 is a constant current LED driver featuring
One Shot Programming mode and Interface Intensity
Control mode for RGB lighting effects.
Each output of the SN3101 is a constant current sink
pulse width modulated in 256 steps, featuring One Shot
Programming mode and Interface Intensity Control mode
for RGB lighting effects. The output current is user
selectable to be one of 5 levels, 17.5mA, 30.9mA,
42.1mA, 48.2mA or 71.9mA (typical). At 42.1mA the
SN3101 outputs require only 0.42V of headroom
voltage.
In One Shot Programming mode, the timing
characteristics for output current - current rising, holding,
falling and off time, can be adjusted individually so that
each output can independently maintain a pre-established
pattern without requiring any additional interface activity,
thus saving valuable system resources.
In Interface Intensity Control mode, the PWM duty cycle
of each output can be independently programmed and
controlled in 256 steps to simplify color mixing.
T ypical Application Circuit
Features
3 channels of 256 steps PWM RGB LED drivers
Changing intensity of color LEDs with two modes:
-One Shot Programming Mode
-Interface Intensity Control Mode
Programmable output current level settings
For anode-common LEDs
SPI interface
Supply voltage range: 3.0V to 5.5V
Operating temperature range T
A
= −40°C ~ +85°C
Package: DFN-10, 3mm × 3mm
Application
Cellular phones
MP3/MP4/CD/minidiskplayers
Digital picture frame/toy
Figure 1 Typical Application Circuit
SN3101
Jan. 2010 P0.5 SI-EN Technology
2
Pin Configuration
Package Pin Configurations (Top View)
DFN-10
SDB
OUT1
OUT0
VDD
SDI
SCK
CS
GND
1
2
3
4
6
7
8
9
GND
10
OUT2
5
Pin Description
No. Pin I/O Description
1 SDB I Shutdown, pull to GND in the shutdown mode.
2 VDD
-
Power supply.
3 ~ 5 OUT0 ~ OUT2 O LED outputs.
6, 10 GND
-
Ground.
7
CS
_____
I Active low chip select for serial communications.
8 SCK I Input clock for data shift on rising edge.
9 SDI I/O Input serial data for data shift resister.
Thermal Pad
-
Connect to GND.
Ordering Information
Order Number Packa ge Type QTY/Reel Operati ng Te mperatu re Range
SN3101I310E DFN-10 2500
-40°C ~ +85°C
SN3101 □ □ □ □
Lead Free Code
E: Lead Free
Pin Code
10: 10 Pins
Package Type
3: DFN, 3mm × 3mm
Operating Temperature Range
I: Industrial, -40°C ~ +85°C