EL7520 4通道DC / DC控制器

EL7520 and EL7520A are 4-channel DC/DC controllers that provide a complete power supply system for TFT-LCD applications. They consist of a 1MHz PWM boost controller, which generates the main voltage for the column driver, and three LDO controllers for VON, VOFF, and VLOGIC supplies. They also include integrated start-up sequence and start-up delay control.

EL7520 and EL7520A operate from 3V to 5.5V. The boost controller can drive a wide range of output current depending on the external FET. It can be programmed to operate in either P-mode for fast transient response or PImode for improved load regulation. The EL7520 and EL7520A also integrate fault protection for all four output channels. When a fault is detected, the device is latched off until either the input supply voltage or enable is cycled. Therefore, they are ideal to use in any size of TFT-LCD panels.

The EL7520 and EL7520A are available in a 20 Ld 4x4 QFN package with maximum height of 0.9mm and is specified for operation of the -40°C to +85°C temperature range.

EL7520 特点

• Complete TFT-LCD supply controller
  • 1MHz PWM boost controller
  • VON LDO controller
  • VOFF LDO controller
  • Logic supply LDO controller
• Integrated start-up sequence for VLOGIC/VBOOST, VOFF, VON or VLOGIC, VOFF, VBOOST, VON
  • VLOGIC permanently enabled in 'A version (EL7520A)
• Programmable sequence delay
• In-rush current control
• Fully fault protected
• Thermal shutdown
• Internal soft-start
• 3V to 5.5V VDD
• 20 Ld 4x4 QFN package
• Low cost
• Pb-Free plus anneal available (RoHS compliant)

EL7520 芯片订购指南

芯片型号	产品状态	温度范围	封装尺寸图	潮湿敏感度等级MSL	美元价格US $
EL7520ILZ	量产	Ind	20 Ld QFN	3	2.40
EL7520ILZ-T13	量产	工业级	20 Ld QFN T+R	3	2.40
EL7520ILZ-T7	量产	工业级	20 Ld QFN T+R	3	2.40

EL7520 应用技术支持与电子电路设计开发资源下载

1. EL7520 数据资料 datatSheet 下载.PDF