innovative power tm - 1 - www.active-semi.com copyright ? 2011 active-semi, inc. activepsr tm is a trademark of active-semi. product brief, 15-apr-11 high performance activepsr tm primary switching regulator features ? patented primary side regulation technology ? no opto-coupler ? suitable operation frequency up to 85khz ? best-in-class constant voltage, constant current accuracy ? low emi ? proprietary fast startup circuit ? built-in soft-start circuit ? integrated line and primary inductance compensation ? integrated programmable output cord resistance compensation ? line under-voltage, output over-voltage, output short-circuit and over-temperature protection ? complies with all global energy efficiency and cec average efficiency standards ? adjustable power from 2w to 6.3w ? minimum external components ? tiny sot23-6 package applications ? chargers for cell phones, pdas, mp3, portable media players, dscs, and other portable devices and appliances ? rcc adapter replacements ? linear adapter replacements ? standby and auxiliary supplies general description the act364 belongs to the high performance patented activepsr tm family of universal-input ac/dc off-line controllers for battery charger and adapter applications. it is designed for flyback topology working in discontinuous conduction mode (dcm). the act364 meets all of the global energy efficiency regulations (cec, european blue angel, and us energy star standards) while using very few external components. the act364 ensures safe operation with complete protection against all fault conditions. built-in protection circuitry is provided for output short- circuit, output over-volt age, line under-voltage, and over temperature conditions. the act364 activepsr tm is optimized for high performance, cost-sensitive applications, and utilizes active-semi?s pr oprietary primary-side feedback architecture to provide accurate constant voltage, constant current (cv/cc) regulation without the need of an opto-coupler or reference device. integrated line and primary inductance compensation circuitry provides accurate constant current operation despite wide variations in line voltage and primary inductance. integrated output cord resistance compensation further enhances output accuracy. the act364 achieves excellent regulation and transient response, yet requires less than 150mw of standby power. the act364 is optimized for compact size 2w to 6.3w charger applications. it is available in space- saving 6 pin sot23-6 package. figure 1: simplified application circuit act364 a ctive-semi
act364 product brief, 15-apr-11 innovative power tm - 2 - www.active-semi.com copyright ? 2011 active-semi, inc. pin configuration pin descriptions part number temperature range package pins packing method top mark ACT364US-T -40c to 85c sot23-6 6 tape & reel fscs sot23-6 ACT364US-T ordering information 6 5 4 1 2 3 cs fb vdd sw g bd fscr fscs pin name description 1 sw switch drive. switch node for the external npn tr ansistor. connect this pin to the external power npn?s emitter. this pin also supplies current to vdd during startup. 2 g ground. 3 bd base drive. base driver fo r the external npn transistor. 4 vdd power supply. this pin provides bias power fo r the ic during startup and steady state op eration. 5 fb feedback pin. connect this pin to a resist or divider network from the auxiliary winding. 6 cs current sense pin. connect an external resistor (r cs ) between this pin and ground to set peak current limit for the primary sw itch. the peak current limit is set by (0.396v 0.9) / r cs . for more detailed information, see application information.
act364 product brief, 15-apr-11 innovative power tm - 3 - www.active-semi.com copyright ? 2011 active-semi, inc. figure 3: universal vac input, 5v/1a output charger item reference description qty manufacturer 1 u1 ic, ACT364US-T, sot23-6 1 active-semi 2 c1, c2 capacitor, electrolytic, 4.7f/400v, 8 12mm 2 ksc 3 c3 capacitor, ceramic,1000pf/500v,1206,smd 1 poe 4 c4 capacitor, electrolytic, 4.7f/35v, 5 11mm 1 ksc 5 c5 capacitor, electrolytic, 680f/10v, 8 12mm 1 ksc 6 c9 capacitor, ceramic,1000pf/50v,0805,smd 1 poe 7 bd1 bridge,b6s,600v/0.5a,mdi,smd 1 panjit 8 d5,d6 diode, ultra fast, fr107,1000v/1.0a, do-41 2 good-ark 9 d8 diode, schottky, 40v/3a, sb340, do-15 1 good-ark 10 l1 axial inductor, 1.5m h, 0410, dip 1 amode tech 11 q1 transistor, npn, 700v,1.5a, d13003, to-126 1 huawei 12 fr1 fusible resistor, 1w, 10 ? , 5% 1 ty-ohm 13 r1,r4 chip resistor, 22 ? , 0805, 5% 2 ty-ohm 14 r2 chip resistor, 750k, 1206, 5% 1 ty-ohm 15 r3 chip resistor, 470 ? , 1206, 5% 1 ty-ohm 16 r5 chip resistor, 49.9k, 0805, 1% 1 ty-ohm 17 r6 chip resistor, 8.87k, 0805, 1% 1 ty-ohm 18 r7,r8 chip resistor, 5.1m ? , 1206, 5% 2 ty-ohm 19 r9 chip resistor, 1.0 ? , 1206, 1% 1 ty-ohm 20 r10 chip resistor, 162k, 0805, 5% 1 ty-ohm 21 r11 chip resistor, 1.1k, 0805, 5% 1 ty-ohm 22 r13 chip resistor, 10 ? , 0805, 5% 1 ty-ohm 23 t1 transformer, l p = 1.5mh7%, efd15 1 table 1: act364 bill of materials
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