Automotive 102 X 4 Chip-on-Glass LCD Segment Driver

PCA8530DUG

The PCA8530 is a fully featured Chip-On-Glass (COG) Liquid Crystal Display (LCD) driver, designed for high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:4. It generates the drive signals for a static or multiplexed LCD containing up to 4 backplane, 102 segment outputs, and up to 408 segments/elements. The PCA8530 features an internal charge pump with internal capacitors for on-chip generation of the LCD driving voltage. To ensure an optimal and stable contrast over the full temperature range, the PCA8530 offers a programmable temperature compensation of the LCD supply voltage. The PCA8530 can be easily controlled by a microcontroller through either the two-line I²C-bus or a four-line bidirectional SPI-bus.

Product Details

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Features

  • AEC Q100 grade 2 compliant for automotive applications
  • Low power consumption
  • Extended operating temperature range from -40 °C to +105 °C
  • 102 segments and 4 backplanes allowing to drive:
    • up to 51 7-segment numeric characters
    • up to 25 14-segment alphanumeric characters
    • any graphics of up to 408 segments/elements
  • 408-bit RAM for display data storage
  • Two sets of backplane outputs providing higher flexibility for optimal COG layout configurations
  • Up to 4 chips can be cascaded to drive larger displays with an internally generated or externally supplied VLCD
  • Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
  • LCD supply voltage:
    • Programmable internal charge pump for on-chip LCD voltage generation up to 5 x VDD2
    • External LCD voltage supply possible as well
  • Selectable 400 kHz I²C-bus or 3 MHz SPI-bus interface
  • Selectable linear temperature compensation of VLCD
  • Selectable display bias configuration
  • Wide range for digital and analog power supply: from 2.5 V to 5.5 V
  • Wide LCD voltage range from 4.0 V for low threshold LCDs up to 12.0 V for high threshold twisted nematic and Vertical Alignment (VA) displays
  • Display memory bank switching in static and 1:2 multiplex drive modes
  • Programmable frame frequency in the range of 45 Hz to 300 Hz; factory calibrated with a tolerance of ±3 Hz (at 80 Hz)
  • Selectable inversion scheme for LCD driving waveforms: frame or n-line inversion
  • Diagnostic features for status monitoring
  • Integrated temperature sensor with temperature readout
  • On chip calibration of internal oscillator frequency and VLCD
  • Laser marking at the back-side of the die for traceability of the lot number, wafer number, and die position on the wafer

Target Applications

  • Automotive
    • Instrument clusters
    • Climate control
    • Car entertainment
    • Car radio
  • Industrial
    • Consumer
    • Medical and health care
    • Measuring equipment
    • Machine control systems
    • Information boards
    • White goods
    • General-purpose display modules

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