Macroblock
Features
Constant current range: 3~30mA
One external resistor only
Preliminary Datasheet
MBI6120
Single-wire 3-Channel Constant Current
Sink Driver for Small LED Clusters
3-channel constant current sink driver for LED strips
Sustaining voltage at output channels: 17V (max.)
Supply voltage 5V~12V with built-in LDO
Embedded 12-bit PWM generator
- Gray scale clock generated by the embedded oscillator
- S-PWM patented technology
Reliable data transmission
- One-wire transmission interface to eliminate clock signal wire
- Built-in buffer for long distance transmission
RoHS-compliant package
Application
LED strips
LED guardrail tubes
Architectural lighting
Product Description
MBI6120 is a 3-channel, constant current, PWM-embedded sink driver for LED strips. MBI6120 provides constant
current ranging from 3mA to 30mA for each output channel and the constant output current is adjustable with an
external resistor. Besides, MBI6120 can operate with a supply voltage ranging from 5V to 12V and sustain 17V at
output channels.
With Scrambled-PWM (S-PWM) technology, MBI6120 enhances pulse width modulation by scrambling the “ON”
time into several “ON” periods to increase visual refresh rate at the same gray scale performance. Besides, the gray
scale clock (GCLK) is generated by the embedded oscillator. The 12-bit gray scale mode provides 4,096 gray
scales for each LED to enrich the color.
In addition, MBI6120 features a one-wire transmission interface to make cluster-to-cluster connection much easier
by eliminating the global clock signal. To improve the transmission quality, MBI6120 provides a unique protocol
(patent pending) and serial data signal regeneration. MBI6120 is also featured by auto-synchronization.
©Macroblock,
Inc. 2012
6F-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30072, R.O.C.
TEL: +886-3-579-0068, FAX: +886-3-579-7534, E-mail:
info@mblock.com.tw
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June 2012, V1.00
MBI6120
Pin Configuration
SDI
R-EXT
GND
SDO
1
2
3
4
MBI6120GD
Top View
Single-wire 3-Channel Constant-Current
Sink Driver for Small LED Clusters
8
7
OUTA
OUTB
OUTC
VDD
MBI6120
6
5
Terminal Description
Pin
1
2
3
4
5
6
7
8
-
Name
SDI
R-EXT
GND
SDO
VDD
OUTC
OUTB
OUTA
Description and function
Input terminal for serial data
Input terminal for setting up output current
Ground terminal
Output terminal for serial data
Supply voltage terminal
Output terminal for channel C
Output terminal for channel B
Output terminal for channel A
Heat dissipation pad.* Please connect to GND.
Thermal Pad
*The desired thermal conductivity will be improved on condition that a heat-conducting copper foil on PCB is
soldered with thermal pad.
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June 2012, V1.00
MBI6120
Typical Application Circuit
Single-wire 3-Channel Constant-Current
Sink Driver for Small LED Clusters
J
3
VIN
GND
TVS
1
DC/DC
Converter
V
LED
J
1
VIN
GND
SDI
C
1
1uF
5
VDD
GND
8
7
6
V
DS
OUTA OUTB
OUTC
3
1
J
2
MBI6120
SDO
R-EXT
2
4
SDI
R
2
option
VOUT
GND
SDO
TVS
2
TVS
3
R
1
Note:
1. TVS
1
~TVS
3
are Transient Voltage Suppressor (TVS).
2. C
1
is required and the value of the C
1
is reference only.
3. For hot plug, system grounding, connector design, external ESD protection, or other circuit information, please
refer to the
“MBI6120 Application Note”
for detailed information.
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June 2012, V1.00
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