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PDF MBI5151 Data sheet ( Hoja de datos )
| Número de pieza | MBI5151 | |
| Descripción | 16-Channel PWM Constant Current LED Driver | |
| Fabricantes | Macroblock | |
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Macroblock
Preliminary Datasheet
MBI5151
16-Channel PWM Constant Current LED Driver
Features
for 1:8 Time-Multiplexing Applications
3V-5.5V supply voltage
16 constant current output channels
Constant output current range:
- 1~20mA @ 5V supply voltage
- 1~10mA @ 3.3V supply voltage
Excellent output current accuracy:
Between channels: <±2.5％(Max.)
Between ICs: <±3％(Max.)
Built-in 4K-bit SRAM to support time-multiplexing for 1 ~ 8 scans
16-bit /14-bit color depth PWM control to improve visual refresh rate
6 bit current gain, 12.5%~200%
LED open detection ( Threshold voltage, 0.3V~0.6V selectable )
Integrating ghost elimination circuit
GCLK multiplier technology
Maximum DCLK frequency: 30MHz
Staggered delay of output to reduce EMI
GF: SOP24L-236-1.00
Product Description
MBI5151 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with
selectable 16-bit / 14-bit color depth. MBI5151 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 1:8
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, MBI5151 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.
MBI5151 drives the corresponding LEDs to the brightness specified by image data. With MBI5151, all output
channels can be built with 16-bit color depth (65,536 gray scales). When building a 16-bit color depth video, S-PWM
technology reduces the flickers and improves the image fidelity.
Through compulsory error detection, MBI5151 detects individual LED for open-circuit errors without extra
components. Besides, integrated ghost elimination circuit eases the ghost problems. For EMI reduction, constant
current output with staggered delay is applied on each channel
Macroblock, Inc. 2013
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 - November 2013, V1.00
1 page | ||
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| PDF Descargar | [ Datasheet MBI5151.PDF ] | |
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