AS3661-EB

AS3661 Programmable 9-channel LED Driver The AS3661 is a 9-channel LED driver designed to produce General Description lighting effects for mobile devices. A high efficiency charge pump enables LED driving over full Li- Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The AS3661 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge pump gain based on LED forward voltage requirements. AS3661 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10A (typ). The AS3661 has an IC-compatible control interface with four pin selectable addresses. Also, the device has a flexible General Purpose Output (GPO), which can be used as a digital control pin for other devices. INT pin can be used to notify processor when a lighting sequence has ended (interrupt - function). Also, the device has a trigger input interface, which allows synchronization between multiple devices.The device requires only four small and low-cost ceramic capacitors. The AS3661 is available in a tiny WL-CSP-25 (2.285 2.285mm) 0.4mm pitch package. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3661, Programmable 9-channel LED Driver are listed below: Figure 1: Added Value Of Using AS3661 Benefits Features Three independent program execution engines 9 programmable outputs with 25.5 mA full-scale current, Smooth light effects for the end user 8- bit current setting resolution and 12-bit PWM control resolution Adaptive charge pump with 1x and 1.5x gain provides up Long battery operating time to 95% LED drive efficiency Charge pump with soft start and overcurrent/short Easy system integration circuit protection Easy system integration Built-in LED test Long battery operating time Automatic power save mode IVDD = 10 A (typ.) ams Datasheet Page 1 v1-31 2015-Feb-03 Document FeedbackAS36 61 Gene ral Des c rip t ion Applications The AS3661, Programmable 9-channel LED Driver is ideal for fun and indicator lights, LED backlighting, and programmable current source. Block Diagram The functional blocks of this device for reference are shown below: Figure 2: AS3661 LED Driver Block Diagram 0 1 230 0 1 230 8 9 8 9 ,- ./0 ./0 ( 3 ( % ( &% ( ( 4 5 ( 5 < : ( 2 ( ( 6 : , ) % ( . ( ( % + ( 7 : % Page 2 ams Datasheet Document Feedback v1-31 2015-Feb-03 (= (