MAX20070|MAX20070B - Integrated TFT Power Supply and LED Backlight Drivers

MAX20070|MAX20070B是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX20070|MAX20070B是Integrated TFT Power Supply and LED Backlight Drivers，本站介绍了MAX20070|MAX20070B的封装应用图解、特点和优点、功能等，并给出了与MAX20070|MAX20070B相关的Maxim元器件型号供参考。

MAX20070|MAX20070B - Integrated TFT Power Supply and LED Backlight Drivers - DC-DC开关调节器 - Integrated TFT Power Supplies and LED Backlight Driver Reduce System Component Count - 美信半导体

产品概述

The MAX20070/MAX20070B are highly integrated power supplies and LED backlight drivers for automotive TFT-LCD applications. The devices integrate one buck-boost converter, one boost converter, two gate-driver supplies, and a boost/SEPIC converter that can power one to two strings of LEDs in the display backlight.

The source-driver power supplies consist of a boost converter and an inverting buck-boost converter that can generate voltages up to +15V and -15V. Both source-driver power supplies can deliver up to 100mA. The positive source-driver supply regulation voltage (VPOS) is set by connecting an external resistor-divider on FBP. Connecting the FBP pin to ground sets the regulation voltage (VPOS) to +6.5V. The negative source-driver supply voltage (VNEG) is always tightly regulated to -VPOS within &plsmn;50mV. The source-driver supplies use an input voltage from 2.7V to 5.5V to generate the output voltages.

The gate-driver power supplies consist of regulated charge pumps that generate up to +22V and -22V and can deliver up to 3mA each. The regulation voltage (VGVDD) on the positive charge pump is set by a resistor-divider on FBPG; the regulation voltage (VGVEE) on the negative charge pump is set by a resistor-divider on FBNG.

The ICs feature a dual-string LED driver that operates off a separate input voltage (VBATT) and can power up to two strings of LEDs with 160mA (max) of current per string.

The startup and shutdown sequences for all power domains is controlled using one of the seven preset modes that are selectable through a resistor on SEQ.

The MAX20070/MAX20070B are available in a 32-pin, 5mm × 5mm TQFN package with an exposed pad, and operates over the -40°C to +105°C ambient temperature range.

关键特性

以下关键特性由Maxim美信半导体提供：

Integrates Both TFT Power Supplies and LED Backlight Driver in One IC, Reducing Component Count

Alleviates EMI Due to Spread Spectrum on Both Source Driver Supplies and LED Driver

10000:1 Dimming Ratio at 200Hz Dimming Frequency

Available in a 32-Pin (5mm × 5mm) TQFN with an Exposed Pad for Heat Dissipation and Operates Over the -40°C to +105°C Ambient Temperature Range

热门应用

汽车中心显示器

汽车仪表盘

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