BU2872AK

Standard ICs FL tube driver BU2872AK The BU2872AK is a driver IC for the FL display unit. It has a total of 22 high withstanding voltage output pins, and supports displays ranging from 11-segment 11-character displays to 16-segment 4-character displays. A key scan function, LED drive output, and a general-purpose input pin make this IC ideal for use in the front panels of VTRs and other equipment. A serial interface enables control of all functions through a microcomputer. Applications VCRs Features 1) High withstanding voltage output. 2) Display modes: 11S × 11G ~16S × 4G 3) Variable display luminance (7 steps). 4) 3-wire serial interface. 5) Key scanning function (6 × 4). 6) Internal pull-down resistance (high withstanding voltage output). 7) QFP 44-pin package. Block diagram OSC SCK VDD G1 GRID Driver 16bit × 11word K4 KEY DATA latch (4 × 6) K1 Display DATA RAM L4 LED Driver 8bit shift - REG. VSS 16bit latch SO CS SI OSC L1 CONTROL LOGIC SW4 4bit data SW1 G6 SEGMENT Driver S / G Driver G11 / S12 G7 / S16 S11 S1 VEE 1 Standard ICs BU2872AK Pin descriptions Pin No. 14, 38 44 7, 43 6 5 8 9 15 ~ 25 27 37 ~ 32 Pin VDD OSC VSS SI SO SCK CS S1 ~ S11 VEE G1 ~ G6 Name Power supply pin 1 Oscillation pin GND pin Serial data input Serial data output Serial clock input Serial chip select High withstanding voltage output pin for segment Power supply pin 2 High withstanding voltage output pin for grid High withstanding voltage output pin for segment / grid ...