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An Introduction to MBI5025

An Introduction to MBI5025. High precision at low current operation. Trend in LED Display. High Definition Resolution Color depth Uniformity Color shift Brightness/color in day and night Nature of aging in LED Reliability Higher ESD, EMI elimination Low temperature Green Technology

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An Introduction to MBI5025

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  1. An Introduction to MBI5025 High precision at low current operation

  2. Trend in LED Display • High Definition • Resolution • Color depth • Uniformity • Color shift • Brightness/color in day and night • Nature of aging in LED • Reliability • Higher ESD, EMI elimination • Low temperature • Green Technology • Low power • Pb-free Time-multiplexing design => Static design

  3. Design Issues and Expectations • Low power consumption • The accuracy of pulse width modulation • LSB will be distorted if channel skew is large at low current • Uniformity at dark • Night time will need lower brightness (current) • Low supply voltage working at 3.3V • High precision in low current operation

  4. OUT0 OUT1 OUT14 OUT15 IO Regulator R-EXT VDD 16-bit Output Driver 16 16-bit Output Latch LE 16 GND 16-bit Shift Register SDO SDI CLK MBI5025: 16-Ch LED Driver • PrecisionDrive™ • Bit-to-Bit: < ±3% • Chip-to-Chip: < ±6% • Output current in accuracy • 3-50mA @ Vds=0.8V • Fast response of output current (400ns ) • Electrical • 3.0V~5.5V supply voltage • 3~50mA output current • -0.5v~17v output voltage • 25MHz clock frequency

  5. PrecisionDrive™ @MBI5025 • ±3% current accuracy in ports and ±6% in ICs • The current varied with supply voltage change and ambient temperature change is also restricted to 1%. • The current varied with the LED forward voltage change is confined to 0.1% per volt. • A wide range of forward voltage (VF) variations

  6. Skew between Channels @MBI5025 Within the spec (<±3%) in Iout= 3mA~50mA and VDD= 3.0-5.5V

  7. Skew between Chips @MBI5025 Outstanding in Iout < 3mA and VDD= 3.0-3.6V

  8. Line Regulation Improvement of operating voltage at VDD= 3.0-3.6V << 1%

  9. Advantages of MBI5025 • Supply voltage: 3.3V / 5.0V • 3.3V CMOS-compatible inputs • Function and pin connection and packages are same with MBI5026 • High precision at low current • Bit-to-Bit <3% @ 3*mA~45mA • Chip-to-Chip <6% @ 3*mA~45mA

  10. Product Lineup V

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