AN30888A High Brightness LED Driver IC - Panasonic

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Established : 2012-02-28Revised : 2013-02-18Doc No. TA4-EA-06057Revision. 3Product StandardsAN30888AELECTRICAL CHARACTERISTICSV IN = 6 V, ENB = 6 V, PWM = V REGNote) T a = 25 C 2 C unless otherwise specified.ParameterSymbolConditionMinLimitsTypMaxUnitNoteCircuit Current ConsumptionStandby CurrentI STBENB = 0 V——10µA—Operating Quiescent CurrentENB Low Input LogicVFB_SEL High Input LogicVFB_SEL Low Input LogicPWM High input LogicPWM Low input LogicInput Pin Current ConsumptionEnable Pin CurrentOutput DriverSW High Output LogicSW Low Output LogicUnder Voltage Lock Out (UVLO)Under Voltage protection onvalueUnder voltage protectionHysteresisI CCV ENBLV VFBSELHV VFBSELLV PWMHV PWMLI ENBV SWHV SWLV UVLOONV UVLOHYSENB = V INNo load conditionENABLE (ENB), VFB_SEL, ENABLE (ENB), VFB_SEL and PWM Control FunctionENB High Input LogicV ENBHENB = 6 V——————SW output High logic;MOSFET ON conditionSW output Low logic;MOSFET OFF conditionV IN Falling SW OFF;V REG = no loadV IN Rising SW ON ,V IN Falling SW OFF;V REG = no load—300.7 V REG00.7 V REG0—0.7 V— REGV REG +0.2V —–0.2 — 0.2 V —1.9 2.1 2.3 V —0.1————————0.3150.3 V REG50.3 V REG250.5mAV IN V —0.3 V —VVVVµAV———————Page 6 of 21
Established : 2012-02-28Revised : 2013-02-18Doc No. TA4-EA-06057Revision. 3Product StandardsAN30888AELECTRICAL CHARACTERISTICSV IN = 6 V, ENB = 6 V, PWM = V REGNote) T a = 25 C 2 C unless otherwise specified.ParameterReference Voltage ControlVFB Reference Voltage 1VFB Reference Voltage 2SymbolV VFB1V VFB2ConditionVFB_SEL = HighOVP = 0 VBuck mode)VFB_SEL = LowOVP = 0 V(Buck mode)Min——LimitsTyp20232Max——UnitmVmVNote*1*1Over Voltage Protection (Boost Mode ,Buck-Boost mode Only)Over Voltage Protection ThresholdV OVPR1 = 470 k, R2 = 30 k—21—V*1*2Output DriverDriver Off TimeT OFFFix off time at SW pin0.512s—Maximum Operating FrequencyF Max——1.2—MHz*1Regulator Voltage (VREG)VREG Output VoltageV REG4V V IN 20 VNo Load Condition,CVREG = 1 F—3.65—V*1EfficiencyEfficiencyEffV IN =6V1 LED of V F =3.7VI LED = 400 mAVFB_SEL = HighOVP = 0 V (Buck mode)—90—%*1Note) *1 : Typical design value*2 : See OPERATION (Functions and properties descriptions) (9) Over Voltage Protection (OVP)Page 7 of 21
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AN30888A High Brightness LED Driver IC - Panasonic

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