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preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 1 general description the AP4340 is an output voltage detector for primary side control system. it detects the output voltage and provides a periodical signal when the output voltage is lower than a certain threshold. the periodical signal can be coupled by the transformer to the primary side and provided as an awakening signal for the main primary side controller. by fast response to secondary side voltage, the AP4340 can effectively improve the transient perfo rmance of primary side control system. the AP4340 is available in to-92 and sot-23 packages. features ? fast detector of supply voltages ? 37khz output pulse ? no external components applications adapters/chargers for cell/cordless phones, adsl modems, mp3 and other portable apparatus standby and auxiliary power supplies to-92 (bulk packing) to-92 (ammo packing) sot-23 figure 1. package types of AP4340
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 2 pin configuration z package z package to-92 bulk packing to-92 ammo packing n package sot-23 3 2 1 figure 2. pin configuration of AP4340 (top view) pin description pin number to-92 sot-23 pin name function 1 1 vcc this pin is the positive supply voltage input. vcc signal is also used to detect the secondary output voltage 3 2 out this pin supplies the pulse output current when v cc is lower than the internal trigger voltage 2 3 gnd this pin is the control ground 1 2 3 gnd vcc out 1 2 3 gnd vcc out
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 3 functional block diagram vcc power regulator band-gap logic out gnd v ref out comp + - uvlo + - driver v ref vdd uvlo vdd osc dynamic v ref 1 (1) 3 (2) 2 (3) figure 3. functional block diagram of AP4340 ordering information AP4340 - g1: green circuit type package z: to-92 n: sot-23 package temperature range part number marking id packing type AP4340z-g1 4340z-g1 bulk to-92 AP4340ztr-g1 4340z-g1 ammo sot-23 -40 to 85 c AP4340ntr-g1 gt2 tape & reel bcd semiconductor's pb-free products, as designated with "g1" suffix in the part number, are rohs compliant and green. blank: bulk tr: tape & reel or ammo a (b) a for to-92 b for sot-23
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1) parameter value unit supply voltage v cc -0.3 to 9 v voltage at out -47 to 9 v v cc to v out -0.6 to 47 v output current at out internally limited a sot-23 0.2 power dissipation at t a =25oc to-92 0.5 w operating junction temperature 150 oc storage temperature -65 to 150 oc lead temperature (soldering, 10 sec) 300 oc sot-23 137 thermal resistance junction-to-case to-92 83 oc/w note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional op eration of the device at these or any other conditions beyond those indicated under ?recommended operating conditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit supply voltage v cc 0 6 v ambient temperature t a -40 85 oc
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 5 electrical characteristics v cc =5v, t a =25 , unless otherwise specified . parameter conditions min typ max unit supply voltage ( vcc pin ) power-on voltage (v on ) 4.1 4.4 4.8 v startup current v cc =v on -0.2v 50 200 245 a operating current out pin floating v cc =5v 50 240 285 a power-off voltage 3.45 3.8 4.15 v internal trigger voltage 4.83 4.9 5 v output section/ oscillator section duty cycle v cc =4.5v 1.5 5 6.5 % normal frequency v cc =4.5v 25 38 50 khz output maximum current out pin connect 100 ? to gnd 15 23 30 ma note 2: the system output voltage is 5v.
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 6 typical performance characteristics figure 4. power-on voltage vs. ambient temperature figure 5. operating current vs. ambient temperature figure 6. power-off voltage vs. ambient temperature figure 7. internal trigger voltage vs. ambient temperature -40-20 0 20406080100120 4.32 4.33 4.34 4.35 4.36 4.37 4.38 4.39 4.40 power-on voltage (v) ambient temperature ( o c) -40-20 0 20406080100120 170 180 190 200 210 220 230 240 250 260 270 operating current ( a) ambient temperature ( o c) -40-20 0 20406080100120 3.60 3.65 3.70 3.75 3.80 3.85 3.90 3.95 4.00 4.05 4.10 power-off voltage (v) ambient temperature ( o c) -40-20 0 20406080100120 4.78 4.79 4.80 4.81 4.82 4.83 4.84 4.85 4.86 4.87 4.88 internal trigger voltage (v) ambient temperature ( o c)
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 7 typical performance char acteristics (continued) figure 8. duty cycle vs. ambient temperature figure 9. oscillation frequency vs. ambient temperature figure 10. output current vs. ambient temperature -40-20 0 20406080100120 4.50 4.75 5.00 5.25 5.50 duty cycle (%) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 30.0 32.5 35.0 37.5 40.0 42.5 45.0 oscillation frequency (khz) ambient temperature ( o c) -40-20 0 20406080100120 18 20 22 24 26 28 30 32 34 36 38 output current (ma) ambient temperature ( o c)
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 8 operation description figure 11. typical waveforms of AP4340 when vcc voltage is beyond 4.4v, the AP4340 starts up. when the vcc voltage falls below the internal trigger voltage (4.9v), the out pin asserts a periodical pulse with frequency of 37khz. the pulse signal will stop when vcc voltage increases up to the trigger voltage. when th e vcc voltage is below 3.8v, the AP4340 will be shut down.
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 9 typical application figure 12. typical application of AP4340
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 10 mechanical dimensions to-92(bulk packing) unit: mm(inch) 2.420(0. 095) 2.660(0.105) 0.360(0. 014) 0.760(0. 030) 1.600(0. 063) max 12.500(0.492) 15.500(0.610) 1.270(0. 050) typ 3.300(0.130) 3.700(0.146) 4.300(0.169) 4.700(0.185) 1.000(0.039) 1.400(0. 055) 4.400(0.173) 4.800(0.189) 3.430(0. 135) min 0.320(0.013) 0.510(0.020) 0. 000(0.000) 0. 380(0.015)
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 11 mechanical dimensions (continued) to-92 (ammo packing) unit: mm(inch)
preliminary datasheet dynamic psr accelerator AP4340 aug. 2011 rev. 1. 1 bcd semiconductor manufacturing limited 12 mechanical dimensions (continued) sot-23 unit: mm(inch)
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited

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