4 x 60 Automotive LCD Segment Driver with Integrated Charge Pump

Overview

The PCA8543 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes, 60 segments, and up to 240 elements. The PCA8543 is compatible with most microcontrollers and communicates via the two-line bidirectional I²C-bus. Communication overheads are minimized using a display RAM with auto-incremented addressing and display memory switching. The PCA8543 features an internal charge pump with internal capacitors for on-chip generation of the LCD driving voltages.

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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
60 segments and 4 backplanes allowing to drive:
- up to 30 7-segment alphanumeric characters
- up to 15 14-segment alphanumeric characters
- any graphics of up to 240 elements
Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
Programmable internal charge pump for on-chip LCD voltage generation up to 3 x V_DD2
400 kHz I²C-bus interface
Selectable linear temperature compensation of V_LCD
Selectable display bias configuration
Wide range for digital and analog power supply: from 2.5 V to 5.5 V
Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high threshold (automobile) twisted nematic LCDs
On-chip RAM for display data storage arranged in two banks
Display memory bank switching
Programmable frame frequency in steps of 10 Hz in the range of 60 Hz to 300 Hz; factory calibrated with a tolerance of ±15 % covering the whole temperature and voltage range
Selectable inversion scheme for LCD driving waveforms: frame or line inversion
Integrated temperature sensor with temperature readout
On chip calibration of internal oscillator frequency and V_LCD

Target Applications

Instrument cluster
Car radio
Climate control units

MoreLess

Features

AEC-Q100 grade 2 compliant for automotive applications
Low power consumption
Extended operating temperature range from -40 °C to +105 °C
60 segments and 4 backplanes allowing to drive:
- up to 30 7-segment alphanumeric characters
- up to 15 14-segment alphanumeric characters
- any graphics of up to 240 elements
Selectable backplane drive configuration: static, 2, or 4 backplane multiplexing
Programmable internal charge pump for on-chip LCD voltage generation up to 3 x V_DD2
400 kHz I²C-bus interface
Selectable linear temperature compensation of V_LCD
Selectable display bias configuration
Wide range for digital and analog power supply: from 2.5 V to 5.5 V
Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high threshold (automobile) twisted nematic LCDs
On-chip RAM for display data storage arranged in two banks
Display memory bank switching
Programmable frame frequency in steps of 10 Hz in the range of 60 Hz to 300 Hz; factory calibrated with a tolerance of ±15 % covering the whole temperature and voltage range
Selectable inversion scheme for LCD driving waveforms: frame or line inversion
Integrated temperature sensor with temperature readout
On chip calibration of internal oscillator frequency and V_LCD