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PDF MBI5153 Data sheet ( Hoja de datos )
| Número de pieza | MBI5153 | |
| Descripción | 16-Channel PWM Constant Current LED Driver | |
| Fabricantes | Macroblock | |
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Macroblock
Preliminary Datasheet
MBI5153
16-Channel PWM Constant Current LED Driver
Features
for 1:32 Time-Multiplexing Applications
3V-5.5V supply voltage
16 constant current output channels
Constant output current range:
- 0.5~20mA @ 5V supply voltage
- 0.5~10mA @ 3.3V supply voltage
Excellent output current accuracy:
Between channels:：<±2.5％(Max.)
Between ICs: <±3％(Max.)
Built-in 16K-bit SRAM to support time-multiplexing for 1 ~ 32 scans
14-bit /13-bit color depth PWM control to improve visual refresh rate
6bit current gain，12.5%~200%
LED failure isolation
-LED failure induced cross elimination
LED open detection
Integrating ghost elimination circuit
GCLK multiplier technology
Maximum DCLK frequency: 30MHz
Product Description
MBI5153 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with
selectable 14-bit / 13-bit color depth. MBI5153 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. The innovative architecture with embedded SRAM is designed to support up to 1:32
time-multiplexing applications. Users only need 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 to save the data
bandwidth and to achieve high grayscale with very low data clock rate. With scan-type Scrambled-PWM (S-PWM)
technology, MBI5153 enhances PWM 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. In addition, the innovative GCLK multiplier technique doubles visual refresh rate.
MBI5153 drives the corresponding LEDs to the brightness specified by image data. With MBI5153, all output
channels can be built with 14-bit color depth (16,384 gray scales). When building a 14-bit color depth video, S-PWM
technology reduces the flickers and improves the image fidelity.
Through compulsory error detection, MBI5153 detects individual LED for open-circuit errors without extra
components. MBI5153 equipped an innovative cross elimination function, and it solves the cross phenomenon
induced by failure LEDs. Besides, integrated ghost elimination circuit eases the ghost problems.
Macroblock, Inc. 2014
Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: [email protected]
- 1 - May 2014, V1.00
1 page | ||
| Páginas | Total 1 Páginas | |
| PDF Descargar | [ Datasheet MBI5153.PDF ] | |
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