downloaded from elcodis.com electronic components distributor 200815071-1/7 this datasheet contains new product information. advanced power electronics corp. reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. APE1901 step-up pwm dc/dc converter ? general description the APE1901 is high effici ent step-up dc/dc converter. large output current is possible having a built in internal n chann el mosfet, and using an external coil and diode. the APE1901 can be operated at switching freque ncies of 500khz allowing for easy filtering and low noise, the size of t he external components can be reduced. output voltage is programm able with 1.0v of standard voltage supply internal, and using externally connected components, output voltage (f b) can be set up at will. this converter also contains an error amplif ier circuit as well as a soft-start circuit that prevents inrush-current at startup. an enable function and thermal shutdown functions are built inside. ? features - input voltage: 3v to 15v - output voltage: 3.3v to 28v(2.5% - duty ratio: 0% to 80% pwm control - switch current: 3a(max) - oscillation frequency: 500khz. - enable function - soft-start function - thermal shutdown function - built-in internal sw n-channel mos - sop-8l pb-free package. adva nced power electronics corp.
downloaded from elcodis.com electronic components distributor 3 2/7 APE1901 ? block diagram phase compensation + - pwm controller + - oscillator buffer driver fb en vss sw sgnd vcc thermal shutdown vref with en ? pin assignment the package of ax5101a is sop-8l; the pin assignment is given by: name description sgnd signal ground pin. en power-off pin h ? normal operation(step-up) l ? step-up operation stopped (all circuits deactivated) v cc ic power supply pin fb feedback pin sw switch pin. connect external inductor & diode here. ( top view ) 1 2 3 4 8 7 6 5 vcc fb sop-8l APE1901 sgnd en vss vss sw sw v ss gnd pin ? order/marking information order information top marking package type m: sop-8l APE1901x x frequency a : 500khz y ww sss 1901am p art number id code: internal ww: 01~52 year : 6 = 2006 s t ep-up pwm dc/dc converter adva nced power electronics corp.
downloaded from elcodis.com electronic components distributor 3 3/7 ? absolute maximum ratings (at ta=25 : ) characteristics symbol rating unit vcc pin voltage v cc v ss - 0.3 to v ss + 15 v feedback pin voltage v fb v ss - 0.3 to v cc v on/off pin voltage v en v ss - 0.3 to v cc v switch pin voltage v sw v ss - 0.3 to 30 v power dissipation pd internally limited mw storage temperature range t st -40 to +150 APE1901. ? electrical characteristics (v in = 6v, v out =12v, ta=25 : , unless otherwise specified) characteristics symbol conditions min typ max units feedback voltage v fb i out =0.1a 0.98 1.00 1.02 v quiescent current i ccq v fb =1.5v force driver off 4 6 ma feedback bias current i fb i out =0.1a - 0.1 0.5 ua shutdown supply current i sd v en =0v - 2 10 ua switch current i sw 3.2 - - a oscillation frequency f osc sw pin 400 500 600 khz v sh high (regulator on) 2.0 - - en pin logic input threshold voltage v sl low (regulator off) - - 0.8 v i sh v en =2.5v (on) - 20 - ua en pin input current i sl v en =0.3v (off) - -10 - ua soft-start time t ss 0.3 4 8 ms v cc =3v, v fb =0v - 50 70 v cc =5v, v fb =0v 40 60 internal mosfet r dson r dson v cc =12v, v fb =0v - 30 50 m ?
downloaded from elcodis.com electronic components distributor 4/7 ? application circuit 1. vcc=6v, vout=12v/0.8a c6 0.47u c7 0.1uf r1 22k r3 100k u1 APE1901 6 2 4 1 3 8 7 5 sw vcc sgnd ce fb vss vss sw c4 0.1uf l1 15uh c5 470uf r2 2k vout=+12v c3 470uf d1 b340a vcc=6v r2 r1 1. vout = vref x (1 + ------ ) vref = 1.0v ; r2 suggest 0.75k ~ 2.5k option 2. vcc=6v, vout=12v/1.4a c6 c7 0.1uf r1 22k r3 100k u1 APE1901 6 2 4 1 3 8 7 5 sw vcc sgnd ce fb vss vss sw c4 0.1uf l1 15uh r2 2k vout=+12v c3 470uf d1 b340a vcc=6v 1u c8 470uf option c5 470uf v in =6v, i sw =3a v out 12v 18v 24v l1 value 15uh 22uh 27uh s t ep-up pwm dc/dc converter adva nced power electronics corp. APE1901
downloaded from elcodis.com electronic components distributor 3 5/7 3. vcc=12v, vout=18v/1.8a c6 c7 option r1 17k r3 100k u1 APE1901 6 2 4 1 3 8 7 5 sw vcc sgnd ce fb vss vss sw c4 0.1uf l1 15uh c5 470uf r2 1k vout=+18v c3 470uf d1 b340a vcc=12v 1u v in =12v, i sw =3a v out 18v 24v 28v l1 value 15uh 22uh 27uh 4. vcc=3.0v, vout=5v/0.45a c8 c7 r1 4k r3 100k u1 APE1901 6 2 4 1 3 8 7 5 sw vcc sgnd ce fb vss vss sw c4 0.1uf l1 15uh c5 470uf r2 1k vout=+5v c3 470uf d1 b340a vcc=3v 22u option ? function descriptions pwm control the APE1901 consists of dc/dc converters that employ a pulse-width modulation (pwm) system. in converters of the APE1901, the puls e width v aries in a range from 0 to 80%, according to the load current. the ripple voltage produced by th e switching can easily be removed through a filter because the switching frequency remains constant. therefore, these converters provide a low-ripple power ov er broad ranges of input voltage and load current. s t ep-up pwm dc/dc converter adva nced power electronics corp. APE1901
downloaded from elcodis.com electronic components distributor 3 6/7 setting the output voltage application circuit item show s the basic application circui t with APE1901 adjustable output version. the external resistor sets the output voltage accord ing to the following equation: ? ? ? ? ? ? + = r r v v out output voltage ripple application circuit item shows the basic application circuit with APE1901. the output voltage ripple (v ripple ) very lager at high switch current(i sw =3a, v ripple
0.7v ? , external ?3 filters can reduce output voltage ripp le or add mlcc 22uf at output(see next page for output ripple wave): ?3?3 filters c5 470uf r3 100k c9 0.1u c7 0.1uf u5 APE1901 6 2 4 1 3 8 7 5 sw ce fb sgnd vcc pgnd pgnd sw c4 0.1uf l1 15uh r2 1k v cc=6v vout=+12v d1 b340a c3 470uf r1 11k c6 0.1u c8 330uf l2 2.2uh 3 ?3 c6=22uf(mlcc) d1 b340a c6 22u c4 0.1uf c5 470uf r2 1.1k c5 470uf r1 11k v cc=6v r3 100k vout=+12v u5 APE1901 6 2 4 1 3 8 7 5 sw ce fb sgnd vcc pgnd pgnd sw l1 15uh c3 470uf c7 0.1uf pcb layout guide if you need low tc & tj or large pd(power dissipation), the dual sw pins(5&6) at the sop-8l package are interna lly connected to die pad, t he pcb layout should allow for maximum possible copper area at the v cc pins of the APE1901. s t ep-up pwm dc/dc converter adva nced power electronics corp. APE1901
downloaded from elcodis.com electronic components distributor 3 7/7 ? typical characteristics efficiency (v in =6v, v out =12v/1.4a) efficiency (v in =6v, v out =18v/1.0a) efficiency (vin=6v,vout=12v) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0 0.5 1.0 1.5 iout (a) efficiency (v) efficiency (vin=6v,vout=18v) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0 0.2 0.4 0.6 0.8 1.0 iout (a) efficiency (v) efficiency (v in =12v, v out =18v/2.0a ) vout ripple=710mv (v in =6v, i in =3a, v out =12v/1.4a) efficiency (vin=12v,vout=18v) 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0 0.5 1.0 1.5 2.0 iout (a) efficiency (v) ( c6=22uf(mlcc ? page 6) ) vout ripple=102mv (v in =6v, i in =3a, v out =12v/1.4a ( external ?3 filters ? page 6 ) vout ripple=17mv (v in =6v, i in =3a, v out =12v/1.4a) sw v rriple i in sw v rriple i in sw v rriple i in s t ep-up pwm dc/dc converter adva nced power electronics corp. APE1901
downloaded from elcodis.com electronic components distributor package outline : so-8 millimeters symbols min nom max a 1.35 1.55 1.75 a1 0.10 0.18 0.25 b 0.33 0.41 0.51 c 0.19 0.22 0.25 d 4.80 4.90 5.00 e1 3.80 3.90 4.00 e 5.80 6.15 6.50 l 0.38 0.71 1.27 0 4.00 8.00 e 1.all dimension are in millimeters. 2.dimension does not include mold protrusions. part marking information & packing : so-8 1.27 typ advanced power electronics corp. c detail a a1 a 1901a m ywwsss package code part numbe r detail a l date code (ywwsss) y last digit of the year ww week sss sequence e b 1 34 5 6 7 8 2 d e1 e
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