描述 Description

The PACVGA105 incorporates 7 channels of ESD protection for signal lines commonly found in a VGA port for PCs. ESD protection is implemented with current steering diodes designed to safely handle the high peak surge currents associated with the IEC-61000-4-2 Level-4 ESD Protection Standard (±8kV contact discharge). When the channels are subjected to an electrostatic discharge, the ESD current pulse is diverted via the protection diodes into the positive supply rails or ground where they may be safely dissipated. The upper ESD diodes for the R, G and B channels are connected to a separate supply rail (VRGB) to facilitate interfacing to graphics controller ICs with low voltage supplies. The remaining channels are connected to the main 5V rail (VCC). The lower diodes for the R, G and B channels are also connected to a dedicated ground pin (GNDA) to minimize crosstalk due to common ground impedance. Two non-inverting buffers are also included in this IC for buffering the HSYNC and VSYNC signals from the graphics controller IC. These buffers will accept TTL input levels and convert them to CMOS output levels that swing between GND and VCC. These drivers have a nominal 60Ω output impedance to match the characteristic impedance of the HSYNC and VSYNC lines of the video cables typically used. The inputs of these drivers also have high impedance pull-ups (50kW nom.) pulling up to the VAUX rail. In addition, the DDC_CLOCK and DDC_DATA channels have 1.8kΩ resistors pulling these inputs up to the main 5V (VCC) rail.

特性 Features

Seven channels of ESD protection designed to meet IEC-61000-4-2 Level-4 ESD requirements (±8kV contact discharge)
Very low loading capacitance from ESD protection diodes at less than 5pF typical
TTL to CMOS level-translating buffers for the HSYNC and VSYNC lines
Three independent supply pins (VCC, VRGB and VAUX) to facilitate operation with sub-micron Graphics Controller ICs
High impedance pull-ups (50kΩ nominal to VAUX) for HSYNC and VSYNC inputs
Pull-up resistors (1.8kΩ nominal to VCC) for DDC_CLK and DDC_DATA lines

應(yīng)用 Application

ESD protection and termination resistors for VGA (video) port interfaces
Digital TV, Set Top Box, PC/Notebook, Gaming

簡介

PACVGA105屬于集成電路（IC）的電源管理-專用。由制造生產(chǎn)的PACVGA105電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲器總線端接、接地故障檢測、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護、觸覺驅(qū)動器、熱電制冷器控制等。