LT1943 - LT1943是High Current Quad Output Regulator for TFT LCD Panels

LT1943是LINEAR凌力尔特公司的一款LCD / CCD / OLED 偏置产品，LT1943是LT1943是High Current Quad Output Regulator for TFT LCD Panels，本站介绍了LT1943的封装应用图解、特点和优点、功能等，并给出了与LT1943相关的LINEAR元器件型号供参考。

LT1943 - LT1943是High Current Quad Output Regulator for TFT LCD Panels - LCD / CCD / OLED 偏置 - 电源管理 - 凌力尔特

LT1943 - High Current Quad Output Regulator for TFT LCD Panels

LT1943 - High Current Quad Output Regulator for TFT LCD Panels - Linear Technology（凌力尔特）

功能描述

The LT1943 quad output adjustable switching regulator provides power for large TFT LCD panels. The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel. Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output VLOGIC with up to 2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AVDD, VON and VOFF required by the LCD panel. A high-side PNP provides delayed turn-on of the VON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage.

All switchers are synchronized to an internal 1.2MHz clock, allowing the use of low profile inductors and ceramic capacitors throughout. A current mode architecture provides excellent transient response. For best flexibility, all outputs are adjustable. Soft-start is included in all four channels. A PGOOD pin can drive an optional PMOS pass device to provide output disconnect for the AVDD output.

特点

4 Integrated Switches: 2.4A Buck, 2.6A Boost,

0.35A Boost, 0.35A Inverter (Guaranteed Minimum Current Limit)

Fixed Frequency, Low Noise Outputs

Soft-Start for all Outputs

Externally Programmable VON Delay

Integrated Schottky Diode for VON Output

PGOOD Pin for AVDD Output Disconnect

4.5V to 22V Input Voltage Range

PanelProtectTM Circuitry Disables VON Upon Fault

Available in Thermally Enhanced 28-Lead TSSOP

应用