MBI5050 LED Driver Datasheet

MBI5050 Datasheet, PDF, Equivalent


Part Number

MBI5050

Description

16-Channel PWM Constant Current LED Driver

Manufacture

Macroblock

Total Page 30 Pages
Datasheet
Download MBI5050 Datasheet


MBI5050
Macroblock
Preliminary Datasheet
MBI5050
16-Channel PWM Constant Current LED Driver
Features
For Time-multiplexing Applications
z 3V-5.5V supply voltage
z Constant output current range: 3~45mA
- 3~45mA @ 5V supply voltage
- 3~30mA @ 3.3V supply voltage
z Backward compatible with MBI5026 and MBI5030 in package
z 16 constant current output channels
z Built-in 4K-bit SRAM to support time-multiplexing for 1 ~ 8 scans
z 16-bit /14-bit color depth PWM control
z Scan-type Scrambled-PWM technology to improve visual refresh rate
z 6-bit programmable output current gain
z Excellent output current accuracy:
Between channels: <±1.5% (typ.), and
Between ICs: <±3% (typ.),
z Staggered delay of output to reduce EMI
z Maximum data clock frequency: 30MHz
z Schmitt trigger input
Small Outline Package
GGF:FS: SOOPP2244LL-2-33060-1-1.0.000
Shrink SOP
GP: SSOP24L-150-0.64
Product Description
MBI5050 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with
selectable 16-bit / 14-bit color depth. MBI5050 features a 16-bit shift register which converts serial input data into
each pixel’s gray scale of the output port. Sixteen regulated current ports are designed to provide uniform and
constant current sinks for driving LEDs with a wide range of VF variations. The output current can be preset through
an external resistor. Moreover, the preset current of MBI5050 can be further programmed to 64-step for LED global
brightness adjustment.
The innovative architecture with embedded SRAM is designed to support up to 8:1 time-multiplexing applications.
User only needs to send the whole frame data once and to store in the embedded SRAM of the LED driver, instead
of sending every time when the scan line is changed. It helps save the data bandwidth and achieve high grayscale
with very low data clock rate.
With scan-type Scrambled-PWM (S-PWM) technology, MBI5050 enhances Pulse Width Modulation by scrambling
the “on” time of each scan line into several “on” periods and sequentially drives each scan line for a short “on” period.
The enhancement equivalently increases the visual refresh rate of scan-type LED displays. MBI5050 drives the
corresponding LEDs to the brightness specified by image data. With MBI5050, all output channels can be built with
16-bit color depth (65,536 gray scales). Each LED’s brightness can be calibrated enough from minimum to
maximum brightness with compensated gamma correction or LED deviation information inside the 16-bit image data.
When building a 16-bit color depth video, S-PWM technology reduces the flickers and improves the image fidelity.
Also, MBI5050 offloads the signal timing generation of the host controller which just needs to feed data into drivers.
©Macroblock, Inc. 2012
Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: info@mblock.com.tw
-1-
June 2012, V1.03

MBI5050
MBI5050
Block Diagram
16-Channel PWM Constant Current LED Driver
For Time-multiplexing Applications
R-EXT
IO Regulator
and DAC
OUT0 OUT1
OUT14 OUT15
Output Buffers
GCLK
LE
GND
SDI
DCLK
16-bit
Counter
Control
Unit
16 16
16 16
4K-bit
SRAM buffers
16 16
16-bit Shift Register (FIFO)
Figure 1
SDO
- 2 - June 2012, V1.03


Features Macroblock Preliminary Datasheet MBI50 50 16-Channel PWM Constant Current LED Driver Features For Time-multiplexin g Applications z 3V-5.5V supply voltag e z Constant output current range: 3~45 mA - 3~45mA @ 5V supply voltage - 3~30m A @ 3.3V supply voltage z Backward comp atible with MBI5026 and MBI5030 in pack age z 16 constant current output channe ls z Built-in 4K-bit SRAM to support ti me-multiplexing for 1 ~ 8 scans z 16-bi t /14-bit color depth PWM control z Sca n-type Scrambled-PWM technology to impr ove visual refresh rate z 6-bit program mable output current gain z Excellent o utput current accuracy: Between channel s: <±1.5% (typ.), and Between ICs: <± 3% (typ.), z Staggered delay of output to reduce EMI z Maximum data clock freq uency: 30MHz z Schmitt trigger input S mall Outline Package GGF:FS: SOOPP2244L L-2-33060-1-1.0.000 Shrink SOP GP: SSOP 24L-150-0.64 Product Description MBI50 50 is designed for LED video applicatio ns using internal Pulse Width Modulation (PWM) control with selec.
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