AAT1598数据手册AAT中文资料规格书

描述 Description

\tAAT1598 is a DC-DC converter with 4-strings white LEDs backlight driver. It’s input voltage can be operated from 4.5V to 33V. The mismatch current of every string is within ±2.0%. The maximum mismatch among each IC is ±3.0%.The OVP pin can be setup for different LEDs configuration.


\tAAT1598 provides protection when the LEDs are in open conditions. The protective function closes the open LEDs string and keep the others working. Users can use the PWM pin to adjust the brightness of these LEDs strings.


\tAAT1598 offers a simple and economical solution for LCD white LEDs backlight driver.

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特性 Features

• Step-Up Dc-Dc Converter
•▪4.5V to 33V Input Voltage Range
•▪200kHz to 2.0MHz Switching Frequency
•▪Multi-Chip Parallel Operation For More Than 4 Channels
•▪Maximum Output Adjustable to 60V
•▪Internal Low-Dropout 5V Regulator
•▪Low Standby Current
•▪Internal Soft-Start
•▪Adjustable OVP Voltage Level
• 4 Channels Current Regulator
•▪External Resistor Sets LED Current
•▪Adjustable LED Current Up to 200mA
•▪User Defined String Selection
•▪±2.0% Current Matching Between Channels
•▪±3.0% Current Accuracy Between Piece
• Dimming Control
•▪External PWM Dimming Control
•▪PWM Frequency: 100Hz to 20kHz
•▪Time-Shift PWM Phase Dimming Control For Low Audible Noise
• Protections
•▪WLED Open Protection Without Latch
•▪WLED Short Protection With Latch Off
•▪OVP Protection
•▪Over Current Protection
•▪Status Output
•▪Thermal Shutdown Protection
• Compact Package
•▪TSSOP16L (Power Pad)

应用 Application

• Desktop LCD Panel BacklightLCD TVs and Monitors BacklightFlat Panel Video Displays