AAT1599数据手册AAT中文资料规格书

描述 Description

\tThe AAT1599 is a step-up controller with 12-string constant current regulators designed for large size LCD panel backlight application.


\tThe AAT1599 uses PWM current mode control. The switching frequency ranged from 150 to 500kHz can be set by external resistor. The input range of step-up converter is 5 to 28 volt. Precise 5 volt is supplied by internal LDO.


\tThe AAT1599 can drive 12-strings of WLEDs using current balance. The mismatch between each string current is within 2.5%. LED current is adjustable up to 60mA. Its low 600mV regulation voltage on LED current source reduces power loss and improves efficiency.


\tPWM dimming is implemented with external PWM signal or DC input signal. The dimming PWM signal of DC input can be generated internally and the frequency is programmable by an external capacitor.

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特性 Features

• Step-Up Dc-Dc Converter
•▪5V to 28V Input Voltage Range
•▪150kHz~ 500kHz Switching Frequency
•▪Maximum Output Adjustable to 60V
•▪Internal Low-Dropout 5V Regulator
•▪Adjustable OVP Voltage Level
• 12 Channels Current Regulator
•▪External Resistor Sets LED Current
•▪Adjustable LED Current up to 80mA
•▪±2.5% Current Matching Between Channels
• Dimming Control
•▪PWM or DC Input Burst PWM Dimming
• Protections
•▪Under Voltage Lockout
•▪Open and Short LED Protection
•▪OVP Protection
•▪SCP Protection
•▪Thermal Shutdown Protection
• Compact TSSOP28 (Power Pad) and SOP28

应用 Application

• Desktop LCD Flat Panel DisplaysFlat Panel Video DisplaysLCD TVs and Monitors