Diodes AL8808 Manuel d'utilisateur

AL8808 Document number: DS35648 Rev. 2 - 2 1 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808COST EFFECTIVE LOW EMI 30V 1A

AL8808 Document number: DS35648 Rev. 2 - 2 10 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Application Information (co

NEW PRODUCT AL8808 Document number Applicatio PWM DimminThe CTRL pin isoutput stage. The ultimate PWlower switching the accuracy/line At the start

NEW PRODUCT AL8808 Document number Applicatio Start-up and SOn initial power than 0.45V (typithe output startsThis will cause sthe upper LED c The A

NEW PRODUCT AL8808 Document number Applicatio Inductor SeleRecommended data for selecterequired switchiLED current acc The inductor shoThe chosen c

AL8808 Document number: DS35648 Rev. 2 - 2 14 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Application Information (c

AL8808 Document number: DS35648 Rev. 2 - 2 15 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Application Information (c

NEW PRODUCT AL8808 Document number Applicatio EMI and LayoThe AL8808 is decoupling and switching speeddue to switching The turn-on edgand PCB track

AL8808 Document number: DS35648 Rev. 2 - 2 17 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Application Information (c

NEW PRODUCT AL8808 Document number Applicatio Fault ConditioThe AL8808 hasVIN and the SW If the LEDs shouthe expected cudramatically andLEDs. T

AL8808 Document number: DS35648 Rev. 2 - 2 19 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Ordering Information Pa

NEW PRODUCT AL8808 Document number Pin Descri Pin Number 1 2 3 4 5 Functiona Absolute M Symbol ESD HBM ESD MM VIN VSET VSW VCTRL ISW TJ TLEAD TS

AL8808 Document number: DS35648 Rev. 2 - 2 20 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Suggested Pad Layout Please

AL8808 Document number: DS35648 Rev. 2 - 2 3 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Recommended Operating Condi

AL8808 Document number: DS35648 Rev. 2 - 2 4 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Typical Performance Charac

NEW PRODUCT AL8808 Document number Typical Pe SW MOSFET R (m )DS(ON)Ω6050403020100.500.450.400.350.300.250.200.150.000.050.10SW MOSFET R ( )DS(ON)

AL8808 Document number: DS35648 Rev. 2 - 2 6 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Typical Performance Charact

AL8808 Document number: DS35648 Rev. 2 - 2 7 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Typical Performance Charact

AL8808 Document number: DS35648 Rev. 2 - 2 8 of 20 www.diodes.com January 2013© Diodes Incorporated NEW PRODUCT AL8808 Typical Performance Charac

NEW PRODUCT AL8808 Document number Applicatio AL8808 OperaIn normal operainductor L1, andvoltage and the This rising currevoltage to the inWhen this