AN30888A High Brightness LED Driver IC - Panasonic

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Established : 2012-02-28Revised : 2013-02-18Doc No. TA4-EA-06057Revision. 3Product StandardsAN30888APIN CONFIGURATIONTOP VIEWGND116VREGN.C.215N.C.N.C.314ENBVIN413N.C.VFB_SEL512PWMCS611SWN.C.710N.C.OVP89GNDPPIN FUNCTIONSPin No.145689111214162,3,7,10,13,15Pin nameGNDVINVFB_SELCSOVPGNDPSWPWMENBVREGN.C.TypeGroundPowerSupplyInputInputInputGroundOutputInputInputOutput—GroundPower Supply of LSIFeedback voltage select pin.Connect VFB_SEL to VREG pin for operation in 202 mV mode.Connect VFB_SEL to GND for operation in 32 mV mode.Current Sense pin.Connect a resistor to this pin to set the required LED currentOver Voltage Protection input pin for Boost modeConnect to GND for Buck modePower GroundExternal NMOS Transistor Gate DrivePWM Dimming Control.Input clock pulse of high level = VREG and low level = GNDLED current can be reduced according to the duty of this clock pulseto create dimming effectStandby On/Off Control.Connect ENB pin to VIN for Standby offConnect ENB pin to GND for Standby onRegulated Output voltage.This is internal driver voltage. Connect a 1 uF capacitor to this pin for regulatorstability—DescriptionPage 8 of 21
Established : 2012-02-28Revised : 2013-02-18Doc No. TA4-EA-06057Revision. 3Product StandardsAN30888AFUNCTIONAL BLOCK DIAGRAM3.65 VENBENUVLOSWCSPWMGNDPOVPGNDVREGVIN4BGRVREG161.262 V1411CONTROL6129VFB_SEL5Referencevoltage81Notes: This block diagram is for explaining functions. Part of the block diagram may be omitted, or it may be simplified.Page 9 of 21
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AN30888A High Brightness LED Driver IC - Panasonic

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