描述 Description

The AW99706 is a highly accurate, highly matching six-string LCD backlighting power solution for notebook. It is a highly integrated step-up DC-DC converter operating with a wide input voltage for 2.7V to 24V and a temperature range from -40°C to 85°C. The AW99706 integrates a high voltage MOSFET and six high accuracy, high voltage current sinks. Each current sink can be regulated up to 50mA. The LED current can be adjusted via an I2C interface in through a PWM signal. The PWM dimming resolution is up to 12-bit.The AW99706 supports 100kHz to 1.6MHz switching frequency. Flexible selection of switching frequency according to efficiency and component size.Thorough protection features include over temperature, over current protection, input undervoltage lockout, LED open and short detection. The protection status will be showed in register.

特性 Features

Wide Operating Input Voltage: 2.7V ~ 24V
High Output Voltage: Up to 40V
Channel Current Programmable: 5mA to 50mA
Channel Current Regulation:
Accuracy ±3%
Matching ±2%
PWM and/or I2C Control
Dimming Controls
Direct PWM Dimming up to 25kHz with Minimum 1% Duty (400ns)
Up to 12-bit Resolution with 2kHz input PWM signal
Up to 11-bit Resolution with 4kHz input PWM signal
Up to 10-bit Resolution with 8kHz input PWM signal
Up to 12-bit Dimming Resolution with I2C Control Mode
I2C Programs LED Current, Switching Frequency 300kHz to 1.7MHz
Embedded Memory by MTP
Protections
Input Undervoltage Lockout(UVLO)
LED Strings Open and Short Detection
Current Limit Protection
Over Voltage Protection
Over-Temperature Protection
WBQFN 3.5mmX3.5mmX0.75mm-20L Package