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Numéro de référence | MBI5045 | ||
Description | 16-Channel SPWM Constant Current LED Driver | ||
Fabricant | Macroblock | ||
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1 Page
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
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Pages | Pages 24 | ||
Télécharger | [ MBI5045 ] |
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