PCA9620 - LCD High-Drive Segment Driver

With the PCA9620, NXP expands its proven portfolio of LCD segment drivers into high-end applications. Optimized for use in automotive and demanding industrial applications, it delivers the kind of features typically associated with larger dot-matrix drivers in a single LQFP80 package.

The PCA9620 from NXP 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 eight backplanes, 60 segments, and up to 480 elements.

The PCA9620 is compatible with most microprocessors or microcontrollers and communicates via a two-line bidirectional I²C-bus. Communication overheads are minimized using a display RAM with auto-incremented addressing and display memory switching.

The PCA9620 features an internal charge pump with internal capacitors for on-chip generation of the LCD driving voltages.

PCA9620 Features

AEC Q100 grade 2 compliant for automotive applications
Low power consumption
Extended operating temperature range from -40...+105 ℃
60 segments and 8 backplanes allowing to drive:
- up to 60 7-segment alphanumeric characters
- up to 30 14-segment alphanumeric characters
- any graphics of up to 480 elements
480-bit RAM for display data storage
Selectable backplane drive configuration: static, 2, 4, 6, or 8 backplane multiplexing
Programmable internal charge pump for on-chip LCD voltage generation up to 3 × 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...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
Display memory bank switching in static, duplex, and quadruplex drive modes
Programmable frame frequency in steps of 10 Hz in the range of 60...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