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PDF MBI5045 Data sheet ( Hoja de datos )
| Número de pieza | MBI5045 | |
| Descripción | 16-Channel SPWM Constant Current LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Macroblock
Preliminary Datasheet
MBI5045
16-Channel SPWM Constant Current LED Driver
with Low Knee Voltage
Features
z 16 constant-current output channels
z 16-bit color depth PWM control
z Scrambled-PWM technology to improve refresh rate
z Compulsory open circuit detection to detect individual LED errors
-Full panel, data independent
-Silent error detection with 0.1mA
z 6-bit programmable output current gain
z Constant output current range: 2~45mA
-2~ 45mA at 5.0V supply voltage
-2~30mA at 3.3V supply voltage
z Output current accuracy:
-Between channels: <±3% (typ.), and
-Between ICs: <±3% (typ.)
z Staggered delay of output, preventing from current surge
z Maximum data clock frequency: 30MHz
z Schmitt trigger input
z 3.0V-5.5V supply voltage
Small Outline Package
GF: SOP24L-300-1.00
Shrink SOP
GP: SSOP24L-150-0.64
Product Description
MBI5045 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with 16-bit
color depth which features a 16-bit shift register to convert serial input data into each pixel gray scale of output port.
Also, the function is a 16-channel constant current LED driver with VDS=0.2V @ IOUT=20mA, which is excellent
compared to the conventional design. MBI5045 is dedicated to lowering power consumption in LED video display
application. The low knee voltage (LKV) design makes MBI5045 work at a constant output current with low VDS and
still guarantee PrecisionDrive™ feature. The output current can be preset through an external resistor. Moreover,
the preset current of MBI5045 can be further programmed to 64 gain steps for LED global brightness adjustment.
With Scrambled-PWM (S-PWM) technology, MBI5045 enhances Pulse Width Modulation by scrambling the “on”
time into several “on” periods. The enhancement equivalently increases the visual refresh rate. When building a
16-bit color depth video, S-PWM reduces the flickers and improves the fidelity. MBI5045 offloads the signal timing
generation of the host controller which just needs to feed data into drivers. MBI5045 drives the corresponding
brightness of LEDs by specifying image data. With MBI5045, all output channels can be built with 16-bit color depth
(65,536 gray scales). Each LED’s brightness can be calibrated with the compensated gamma correction or LED
deviation information inside the 16-bit image data.
MBI5045 provides a silent error detection which detects LED open circuit error and the execution won’t be observed.
©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 - December 2012, V1.00
1 page  
MBI5045
16-Channel SPWM Constant Current LED
with Low Knee Voltage
Electrical Characteristics (VDD=5.0V)
Characteristics
Symbol
Condition
Min. Typ. Max. Unit
Supply Voltage
Sustaining Voltage at OUT
Ports
Output Current
Input Voltage
“H” level
“L” level
Output Leakage Current
Output Voltage SDO
Current Skew (Channel)
Current Skew (IC)
Output Current vs.
Output Voltage Regulation*
Output Current vs.
Supply Voltage Regulation*
LED Open Error Detection
Threshold
Pull-down Resistor
Supply
Current
“Off”
“On”
*One channel on.
VDD
VDS
IOUT
IOH
IOL
VIH
VIL
IOH
VOL
VOH
dIOUT
dIOUT2
%/dVDS
%/dVDD
-
OUT0 ~ OUT15
Refer to “Test Circuit for
Electrical Characteristics”
SDO
SDO
Ta=-40~85ºC
Ta=-40~85ºC
VDS=17.0V
IOL=+1.0mA
IOH=-1.0mA
IOUT=20mA
VDS=0.25V
Rext=680Ω
IOUT=20mA
VDS=0.25V
Rext=680Ω
VDS within 0.25V and 1.5V,
Rext=680Ω@20mA
VDD within 4.5V and 5.5V
VDS,TH
-
RIN(down) LE
IDD(off) 1 Rext=Open, OUT0 ~ OUT15 =Off
IDD(off) 2 Rext=6KΩ, OUT0 ~ OUT15 =Off
IDD(off) 3 Rext=680Ω, OUT0 ~ OUT15 =Off
IDD(off) 4 Rext=348Ω, OUT0 ~ OUT15 =Off
IDD(on) 1 Rext=6KΩ, OUT0 ~ OUT15 =On
IDD(on) 2
IDD(on) 3
Rext=680Ω, OUT0 ~ OUT15 =On
Rext=348Ω, OUT0 ~ OUT15 =On
4.5 5.0 5.5
V
- - 17.0 V
2
-
0.7xVDD
GND
-
-
VDD-0.4
-
-
-
-
-
-
-
-
±3.0
45
-1.0
1.0
VDD
0.3xVDD
0.5
0.4
-
±4.0
mA
mA
mA
V
V
µA
V
V
%
-
±3.0 ±6.0
%
- ±0.2 ±0.5 % / V
- ±1.0 ±2.0 % / V
-
0.15 0.20
V
250 450 800 KΩ
- 5.5 9.0
- 6.5 8.5
- 8.0 11.0
- 10.0 13.0 mA
- 6.5 9.0
- 8.0 11.5
10.0 13.5
December 2012, V1.00
-5-
5 Page 
MBI5045
16-Channel SPWM Constant Current LED
with Low Knee Voltage
Enable Write Configuration
DCLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 N1 N2 N3
LE
SDI
F E DC B A 9 8 7 6 5 4 3 2 1 0
Next Data
SDO
Previous Data
F ED
Setting Gray Scales of Pixels
MBI5045 implements the gray level of each output port using the S-PWM control algorithm. With the 16-bit data, all
output channels can be built with 65,536 gray scales.
The 16-bit input shift register latches 16 times of the gray scale data into each data buffer with a “data latch”
command sequentially. With a “global latch” command for additional latch, the 256-bit data buffers will be clocked in
with the MSB first, loading the data from port 15 to port 0.
Full Timing for Data Loading
Port 15
Port 14
Port 1
Port 0
DCLK
LE
SDI
SDO
00 01 02
0E 0F 10 11 12
1E 1F 20 21 22
EE EF F0 F1 F2 FD FE FF T0 T1
D0 F D0E D 0D D01 D00 D1 F D1E D1 D
Previous Data
Previous Data D0F D 0E D0D
D11 D10 D2F D2 E D 2D
D01 D 00 D1 F D1E D1 D
D21 D20 DFF DFE DFD DF 2 DF 1 DF0
DD1 DD0 DEF DEE DED DE 2 DE 1 DE 0
Don't Care
Don't Care
T4 T5 T6
Data
Latch
Data
Latch
Data
Latch
Data
Latch
Global
Latch
Error Detection Principle
The principle of MBI5045 LED open-circuit detection (LE+17DCLK) is based on the fact that the LED loading status
is judged by comparing the effective voltage value (VDS) of each output port with the target voltage (VDS,TH ) = 0.15V.
Thus, after the command of “error detection”, the output ports of MBI5045 will be turned on with current 0.1mA for
open-circuit detection.
The error detection time (tEDD) is from the LE falling edge of “enable error detection” command to the LE falling edge
of “read error status code” command. The detection time shall be controlled within a proper length. Longer error
detection time may cause flickers. Conversely, if the error detection time is shorter; the detection result may not be
stable. In general case, LE is suggested to last over 700ns. When the detection is finished, the LE falling edge
should follow the first DCLK falling edge for reading the error detection result.
D CLK
LE
SD O
1. Enable Error Detection
1 2 16 17
2. Error Detection Time(min. 700 ns)
3. Error Detection Result
18 1 2 3 4 5 6 7 8
err15 err14
er r13
err12 err11
err 10
err9
err8
- 11 -
December 2012, V1.00
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet MBI5045.PDF ] | |
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