Austria 4x400mA LED drive Microelectronics

Austria Microelectronics Corporation (austriamicrosystems) for the rapid development of high brightness and high brightness LED market launched a 4 * 400mA LED driver AS3691, which further extended its LED driver lineup. "Along with the rapid development of high brightness LED, ordinary LED driver IC can only provide general backlight brightness or LCD display, is no longer the most ideal solution." Austria microelectronics company communication department senior vice president and general manager Alexander Harrer said, "AS3691 is very suitable for white color and high brightness LED applications, because it can not only support the current high, can provide great flexibility in ensuring accuracy, high efficiency, and easy to use."

AS3691 has four independent high-precision current source, the current of each current source is 400mA. The working current of each LED channel can be set by an external resistor. The LED brightness can be controlled by four independent pulse width modulation input elements. The AS3691 integrates four independent current sources on each chip, enabling it to drive up to four white LED with each absorption current of 400mA and a white LED with an absorption current of up to 1.6A.

This IC absolute current accuracy of 0.5%, can achieve a high degree of brightness settings, and become the ideal choice to support RGB backlight LCD display and other complex color management applications." Austria microelectronics company power and lighting management market manager Ronald Tingl said: "has four independent current source of AS3691 in RGGB and RGBA on different color LED settings have great flexibility. The voltage compatibility range of the current source is up to 15V, and the special built-in circuit can support a high LED supply voltage, which is limited to the maximum power consumption of the whole application itself."

AS3691 linear actuator can avoid all kinds of typical problems derived from induction booster LCD display applications, such as severe electromagnetic interference or image dithering.

In order to optimize the efficiency of the application, each channel contains a feedback output, which can be controlled by one or more external power supply, the overall power consumption in the minimum range.

AS3691 uses a small QFN4 x 4 package or custom mode.