ACT4523A

40 V, 3.5 A Sensorless CC/CV Step-Down DC/DC Converter; • 40 V input voltage surge\n• 36 V steady state operation\n• Up to 3.5 A output current\n• Output voltage up to 12 V\n• 250 kHz switching frequency\n• 91% efficiency (Vout = 5 V @ 3.5 A at Vin = 12 V)\n• Patented Active CC sensorless constant current control\n• Resistor programmable\n• +/- 6.5% CC accuracy\n• 2% feedback voltage accuracy\n• Advanced feature set\n;

Qorvo's ACT4523A is a wide input voltage, high efficiency Active CC step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4523A provides up to 3.5 A output current at 250 kHz switching frequency.\nActive CC is a patented control scheme to achieve highest accuracy with sensorless constant current control. Active CC eliminates the expensive, high accuracy current sense resistor, making it ideal for battery charging applications and adaptors with accurate current limit.\nThe product achieves higher efficiency than traditional constant current switching regulators by eliminating its associated power loss on the sensing resistor. ACT4523A provides an OVP pin for output over-voltage protection. Other protection features include cycle-by-cycle current limit, thermal shutdown, and frequency foldback at short circuit.\nACT4523A is available in a SOP-8EP package and requires very few external components for operation.\n

ACT4523A

Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

GENERALDESCRIPTION ACT4523Aisawideinputvoltage,highefficiencyActiveCCstep-downDC/DCconverterthatoperatesineitherCV(ConstantOutputVoltage)modeorCC(ConstantOutputCurrent)mode.ACT4523Aprovidesupto3.5Aoutputcurrentat250kHzswitchingfrequency. FEATURES •40VInpu

ACT4523AYH-T

Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

GENERALDESCRIPTION ACT4523Aisawideinputvoltage,highefficiencyActiveCCstep-downDC/DCconverterthatoperatesineitherCV(ConstantOutputVoltage)modeorCC(ConstantOutputCurrent)mode.ACT4523Aprovidesupto3.5Aoutputcurrentat250kHzswitchingfrequency. FEATURES •40VInpu

ACT4523AYH-T

Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

ACT4523YH-T

Wide-InputSensorlessCC/CVStep-DownDC/DCConverter

GENERALDESCRIPTION ACT4523isawideinputvoltage,highefficiencyActiveCCstep-downDC/DCconverterthatoperatesineitherCV(ConstantOutputVoltage)modeorCC(ConstantOutputCurrent)mode.ACT4523providesupto3Aoutputcurrentat225kHzswitchingfrequency. FEATURES •40VInputV

ACT4523YH-T

Wide-InputSensorlessCC/CVStep-DownDC/DCConverter

ACT4523YH-T

Wide-InputSensorlessCC/CVStep-DownDC/DCConverter

AK4523

EVALUATIONBOARDREV.AFORAK4523

GENERALDESCRIPTION TheAK4523hasadynamicrangeof100dBandiswell-suitedmiddle-rangeMD,surroundsystem, musicalinstrumentsandcaraudio.Signalinputsandoutputsaresingle-ended.TheDACoutputsare analogfilteredtoremoveoutofbandnoise.Externalcomponentsareminimized. FE

AK4523

20BITSTEREOADC&DAC

GENERALDESCRIPTION TheAK4523hasadynamicrangeof100dBandiswell-suitedmiddle-rangeMD,surroundsystem, musicalinstrumentsandcaraudio.Signalinputsandoutputsaresingle-ended.TheDACoutputsare analogfilteredtoremoveoutofbandnoise.Externalcomponentsareminimized. FE

AK4523VF

20BITSTEREOADC&DAC

GENERALDESCRIPTION TheAK4523hasadynamicrangeof100dBandiswell-suitedmiddle-rangeMD,surroundsystem, musicalinstrumentsandcaraudio.Signalinputsandoutputsaresingle-ended.TheDACoutputsare analogfilteredtoremoveoutofbandnoise.Externalcomponentsareminimized. FE