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BU2872AK Datasheet FL tube driver

Manufacturer: ROHM

Overview: 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.

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General Description

s 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 Output pin for LED Key data input pin General-purpose input pin I/O I I/O I I O I I O I O O O I I Function Connected to the power supply of the system Connected to the oscillation capacitor Connected to the ground of the system Serial data input starting from MSB Serial data output starting from MSB Serial data read at rising edge Serial initialization at "L", effective at "H" Output pin for segment Output: Pch open drain + pull-down resistance Pull-down resistance connection for FLP driver Outp

Key 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.

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