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PDF MBI6120 Data sheet ( Hoja de datos )
| Número de pieza | MBI6120 | |
| Descripción | Single-wire 3-Channel Constant Current Sink Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6120 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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Macroblock
Preliminary Datasheet
MBI6120
Single-wire 3-Channel Constant Current
Sink Driver for Small LED Clusters
Features
z 3-channel constant current sink driver for LED strips
z Constant current range: 3~30mA
z One external resistor only
z Sustaining voltage at output channels: 17V (max.)
z Supply voltage 5V~12V with built-in LDO
z Embedded 12-bit PWM generator
- Gray scale clock generated by the embedded oscillator
- S-PWM patented technology
z Reliable data transmission
- One-wire transmission interface to eliminate clock signal wire
- Built-in buffer for long distance transmission
z RoHS-compliant package
Application
z LED strips
z LED guardrail tubes
z 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: [email protected]
- 1 - June 2012, V1.00
1 page  
MBI6120
Single-wire 3-Channel Constant-Current
Sink Driver for Small LED Clusters
Equivalent Circuits of Inputs and Outputs
R-EXT terminal
OUTA,B,C terminal
SDI terminal
SDO terminal
- 5 - June 2012, V1.00
5 Page 
MBI6120
Single-wire 3-Channel Constant-Current
Sink Driver for Small LED Clusters
The Structure of Packet
The data packet of MBI6120 is composed of two parts:
1. Header:
The header defines the cascaded IC numbers and also contains a command to decide the data type.
2. Data:
This is the gray scale data for each IC.
Structure of one packet:
Total N pieces of IC in cascade, N=1~1024
SDI IC1 IC2 IC3
One Packet
ICN‐1
ICN
Header ICN data ICN‐1 data
IC2 data IC1 data
MSB
H1
MSB
CLK
Header
MSB MSB
CMD NUM
Total 36 logic bit
gap
2 bit width
Header[35:24] H1: 12-bit strings of ‘1’ as the preamble of the data packet
Header[23:20] CLK: 4-bit GCLK selector
Header[19:12] CMD: 8-bit command
Header[11:0] NUM: 12-bit number of cascaded devices
gap: a symbol defined in the previous page
As for the sequence of the SDI gray scale data, the data of the last IC will be sent first from the controller.
Table of the Definition of the Header
Definition
Bit
Value
Function
H1 [35:24] 12’b111111111111 Data rate detection
[23:22] xx (don’t care)
Reserved
2’b00 (default)
GCLK=5.2MHz (typ.)
CLK
[21:20]
2’b01
2’b10
GCLK=2.6MHz (typ.)
GCLK=1.3MHz (typ.)
2’b11
GCLK=650kHz (typ.)
8’b00000000
Gray scale data
CMD
[19:12]
8’b01010101
Other values
Software reset
Ineffective, ignored
[11:10] xx (don’t care)
Reserved
NUM
[9:0]
10’b0000000001~
10’b1111111111
Number of cascaded IC’s
- 11 -
June 2012, V1.00
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MBI6120.PDF ] | |
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