IC Technology launched AX7701/7702 series current source white LED driver

Arthur Wright Driver IC Technology launched LED AX7701/7702 series Current Source, the series is composed of a charge pump (Charge Pump) and current source (Current Source) 4 channel white LED driver IC. to use a simple charge pump (Charge Pump), 1M/ 250K frequency to 1/1.5/2 times automatic modulation the output voltage is sufficient, in the current source (Current Source) way to make the current 4 channels are very similar, so that the brightness of LED equal 4 channels. The channel current size by a simple external control, and to achieve the purpose of regulating light. The input voltage 2.5 to 5.5 volts, also applies to the single use of lithium battery, which is very suitable for handheld products (mobile phone, PDA Portable, MP3 Player), LCD backlight and keypad backlight.

Application of AX7701/7702 Series in addition to providing efficient channel current stable equilibrium, with its internal short-circuit protection (SCP), (Current-limit Protection) overcurrent protection, overvoltage protection and over temperature protection (OVP) (Thermal Shutdown Protection) function, and built-in soft start function (Soft Start), can inhibit boot mode switching and instantaneous large current, and input can protect the battery life.

Because of the simple structure, so the use of external components are few, coupled with the use of QFN-16L packaging, printed circuit board significantly reduced the use of space, but also reduce the relative cost of.QFN element using the packaging itself at the bottom with cooling pad, the heat to the printed circuit board, greatly reduce the surface temperature of the components to meet customer requirements.

Source: International Electronic Business