Wide Peng Technology launched LED backlight driver IC A723

Wide Peng Technology (ADDtek Corp.) launched 80 LED, the efficiency of up to 93% of the channel, the constant current LED backlight driver IC - A723. 4.5V to 25V wide input voltage range, with a variety of power supply driven 18 ~ 80 LED uniform brightness. The same series of products - six channel A706 and the three channel A707, has been widely used in Korea and Taiwan in Netbook PC and Notebook PC backlight drive on the LED. A723 is focused on the larger size Notebook PC with Monitor backlight applications LED.

Guangpeng technology A706/A707/A723 series is composed of a built-in high-voltage switch boost driver core and multi-channel constant current source, and the voltage feedback mechanism to drive the IC to work at the best efficiency model, not only can make up for the LED forward voltage (VF) difference, more due to the LED forward voltage following temperature change, real-time adjustment of the output voltage, to drive the IC maintained at high efficiency. Design of constant current source multi channel current size set by users with an external resistor, the current in each LED string, eliminate the brightness difference between LED series, is a can provide extremely uniform brightness backlight solution. The series IC can use pulse width modulation (PWM) mode dimming, dimming frequency in the range of 100Hz ~ 25KHz, can provide a good linearity, but also can reach more than 256 orders of dimming. The time difference switching mechanism, which can stagger the turn-on and turn off time of each channel current, can reduce the interference caused by the PWM dimming.

Multiple protection mechanism Guangpeng technology innovation patent technology A706/A707/A723 series IC: LED open circuit protection circuit can make the channel without LED open circuit condition to maintain normal work, to avoid the back light source is completely extinguished; overvoltage protection circuit can drive IC and peripheral components from overvoltage damage, and can be used by users according to the periphery set the pressure component overvoltage protection, and thus reduce the cost of output capacitor; overcurrent protection circuit can protect the driver IC and peripheral components from over-current damage; overheat protection circuit will be excessive in the number of LED short circuit damage, triggering overheating protection mechanism and close the driving circuit to avoid burning, when the temperature dropped, automatically reactivated and output current; other protection circuits such as undervoltage lockout protection (UVLO), can improve the stability and safety of the operation .