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MP163 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 1 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. the future of analog ic technology description the MP163 is a primary-side regulator that provides accurate, dual-output, constant voltage (cv) regulation without an optocoupler. the MP163 supports buck, boost, buck-boost, and flyback topologies and has an integrated 700v mosfet and an ldo to simplify the structure and reduce cost. these features make the MP163 an ideal regulator for offline, low- power applications, such as home appliances and standby power. the MP163 is a green-mode operation regulator. both the peak current and switching frequency decrease as the load decreases. this feature provides excellent efficiency at light load and improves overall average efficiency. full protection features includ e thermal shutdown, vcc under-voltage lockout (uvlo), overload protection (olp), short-circuit protection (scp), and open-loop protection. the MP163 is available in soic16 and soic8- 7b package s . part number typical hv regulator peak current limit typical hv mosfet r ds(on) ldo output voltage MP163a-33 210ma 16 ? 3.3v MP163a-5* 5v MP163b-33 420ma 14 ? 3.3v MP163b-5* 5v MP163c-33 660ma 13.5 ? 3.3v MP163c-5 5v * under development. features ? primary-side constant voltage (cv) control, supporting buck, boost, buck-boost, and flyback topologies ? integrated 700v mosfet and current source ? internal ldo, optimized for dual output applications ? less than 30mw of no-load power consumption ? up to 4w of output power ? low vcc operating current ? frequency foldback ? limited maximum frequency ? peak-current compression ? internally biased vcc ? thermal shutdown, uvlo, olp, scp, and open-loop protection ? available in soic16 and soic8-7b packages applications ? home appliances, white goods, and consumer electronics ? industrial controls ? standby power a ll mps parts are lead-free, halogen-free, and adhere to the rohs directive. fo r mps green status, please visit the mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks o f monolithic power systems, inc.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 2 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. typical application
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 3 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. ordering information part number* package top marking MP163ags-33 soic8-7b see below MP163agse-33 soic16 see below MP163bgs-33 soic8-7b see below MP163bgse-33 soic16 see below MP163cgs-5 soic8-7b see below MP163cgse-5 soic16 see below MP163cgse-33 soic16 see below MP163cgs-33 soic8-7b see below * for tape & reel, add suffix ?z (e.g. MP163ags-33?z) top marking (MP163ags-33) m163a-33: part number llllllll: lot number mps: mps prefix y: year code ww: week code top marking (MP163bgs-33) m163b-33: part number llllllll: lot number mps: mps prefix y: year code ww: week code top marking (MP163agse-33) mps: mps prefix yy: year code ww: week code MP163a-33: part number lllllllll: lot number top marking (MP163bgse-33) mps: mps prefix yy: year code ww: week code MP163b-33: part number lllllllll: lot number
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 4 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. top marking (MP163cgs-5) MP163c-5: part number llllllll: lot number mps: mps prefix y: year code ww: week code top marking (MP163cgs-33) m163c-33: part number llllllll: lot number mps: mps prefix y: year code ww: week code top marking (MP163cgse-5) mps: mps prefix yy: year code ww: week code MP163c-5: part number lllllllll: lot number top marking (MP163cgse-33) mps: mps prefix yy: year code ww: week code MP163c-33: part number lllllllll: lot number
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 5 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. package reference top view top view soic-8-7b soic-16 absolute maxi mum ratings (1) drain to all other pins ................. -0.3v to 700v source, vcc, fb to all other pins (except drain) ......................................... -0.3v to 700v en, in to gnd ................................ -0.3v to 42v out to gnd ................................... -0.3v to 17v vcc, fb to source .................... -0.3v to 6.5v continuous power dissipation (t a = +25c) (2) soic - 8-7b ............................................... 1. 45 w soic - 16 ................................................... 1.56w junction temperature .............................. 150c lead temperature .................................... 260c storage temperature .............. -60c to +150c esd capability human body model ....... 2.0kv recommended operating conditions (3) operating junction temp. (t j ). .. -40c to +125c thermal resistance (4) ja jc soic - 8-7b ............................. 86 ....... 38 ... c/w soic - 16 ................................. 80 ....... 35 ... c/w notes: 1) exceeding these ratings may damage the device. 2) the maximum allowable power dissipation is a function of the maximum junction temperature t j (max), the junction-to- ambient thermal resistance ja , and the ambient temperature ta. the maximum allowance continuous power dissipation at any ambient temperature is calculated by p d (max)=(t j (max)- t a )/ ja . exceeding the maximum allowance power dissipation will produces an excessive die temperature, causing the regulator to go into thermal shutdown. internal thermal shutdown circuit protects t he device from permanent damage. 3) the device is not guaranteed to function outside of its operating conditions. 4) measured on jesd51-7, 4-layer pcb.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 6 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. electrical characteristics vcc = 5.5v, t j = -40c ~ 125c, min and max are guaranteed by characterization, typical is tested at 25c, unless otherwise specified. parameter symbol condition min typ max units start-up current source and internal mosfet (drain) internal regulator supply current i regulator vcc = 4v, v drain = 100v 2.2 4.1 6 ma drain leakage current i leak vcc = 5.8v, v drain = 400v 10 17 a breakdown voltage v ( br ) dss t j = 25 c 700 v on resistance r on MP163ags-5, MP163ags-33, MP163agse-5, MP163agse-33, t j = 25c 16 20 ? MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33, t j = 25c 14 18 MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33, t j = 25c 13.5 17 supply voltage management (vcc) vcc level (increasing) where the internal regulator stops vcc off 5.4 5.6 6 v vcc level (decreasing) where the internal regulator turns on vcc on 5.1 5.3 5.8 v vcc regulator on and off hysteresis 130 250 mv vcc level (decreasing) where the ic stops vcc stop 3 3.4 3.6 v vcc level (decreasing) where the protection phase ends vcc pro 2.4 2.8 v internal ic consumption i cc t on = maxon , t off = minoff 720 a internal ic consumption (no switching) i cc 200 a internal ic consumption, latch- off phase i cclatch vcc = 5.3v 16 24 a internal current sense leading-edge blanking leb1 350 ns leading-edge blanking for scp (5) leb1 180 ns peak current limit i limit MP163ags-5, MP163ags-33, MP163agse-5, MP163agse-33, t j = 25c 188 210 232 ma MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33, t j = 25c 380 420 460 MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33, t j = 25c 600 660 720
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 7 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. electrical characteristics (continued) vcc = 5.5v, t j = -40c ~ 125c, min and max are guaranteed by characterization, typical is tested at 25c, unless otherwise specified. parameter symbol condition min typ max units scp threshold i scp MP163ags-5, MP163ags-33, MP163ags-5, MP163ags-33, t j = 25c 330 400 510 ma MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33, t j = 25c 500 600 760 MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33, t j = 25c 750 900 feedback input (fb) minimum off time minoff MP163ags-5, MP163ags-33, MP163ags-5, MP163ags-33 7.5 10 12.5 s MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33 9 12 15 MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33 9.5 12 15 maximum on time maxon MP163ags-5, MP163ags-33, MP163ags-5, MP163ags-33 13 18 23 s MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33 17 24 31 MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33 19 24 31 primary mosfet feedback turn-on threshold v fb 2.45 2.55 2.65 v olp feedback trigger threshold v fb_olp MP163ags-5, MP163ags-33, MP163agse-5, MP163agse-33, MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33, 1.64 1.74 1.84 v MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33, 1.6 1.7 1.8 olp delay time olp MP163ags-5, MP163ags-33, MP163agse-5, MP163agse-33, t on = maxon , t off = minoff 175 ms MP163bgs-5, MP163bgs-33, MP163bgse-5, MP163bgse-33, MP163cgs-5, MP163cgs-33, MP163cgse-5, MP163cgse-33, t on = maxon , t off = minoff 220 open-loop detection v old 0.4 0.5 0.6 v thermal shutdown thermal shutdown threshold (5) 150 c thermal shutdown recovery hysteresis (5) 30 c
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 8 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. electrical characteristics (continued) v en = v in , c out = 1 f, t j = -40c ~ 125c, min and max are guaranteed by characterization, typical is tested at 25c, unless otherwise specified. parameter symbol condition min typ max units ldo ldo load current limit i ldo MP163ags-33, MP163agse-33, MP163bgs-33, MP163bgse-33, MP163cgs-33, MP163cgse-33 v out = 0v, v in = 4.3v, t j = 25c 180 270 390 ma MP163ags-5, MP163agse-5, MP163bgs-5, MP163bgse-5, MP163cgs-5, MP163cgse-5, v out = 0v, v in = 6v, t j = 25c dropout voltage v dropout i load = 150ma, v in = v out(nom) - 0.1v 620 1100 mv output voltage v ldo MP163ags-33, MP163agse-33, MP163bgs-33, MP163bgse-33, MP163cgs-33, MP163cgse-33, v in = 4.3v, i out = 0a 3.234 3.3 3.366 v MP163ags-5, MP163agse-5, MP163bgs-5, MP163bgse-5, MP163cgs-5, MP163cgse-5, v in = 6v, i out = 0a 4.9 5 5.1 en rising threshold en th_r MP163agse-5, MP163agse-33, MP163bgse-5, MP163bgse-33, MP163cgse-5, MP163cgse-33, v in = v out ( nom ) + 1v 1.32 1.48 1.64 v en falling threshold en th_f MP163bgse-5, MP163bgse-33, MP163bgse-5, MP163bgse-33, MP163cgse-5, MP163cgse-33, v in = v out ( nom ) + 1v 1.07 1.26 1.46 v shutdown supply current i shdn MP163agse-5, MP163agse-33, MP163bgse-5, MP163bgse-33, MP163cgse-5, MP163cgse-33, v en = 0v, v in = 40v 3 9 a en input current i en MP163agse-5, MP163agse-33, MP163bgse-5, MP163bgse-33, MP163cgse-5, MP163cgse-33, v en = 15v, v in = 40v 0.1 a thermal shutdown (5) 165 c thermal shutdown hysteresis (5) 20 c note: 5) guaranteed by design.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 9 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. typical characteristics 710 720 730 740 750 760 770 780 790 800 810 -40 -25-10 5 20 35 50 65 80 95 110125 5.69 5.70 5.71 5.72 5.73 2.52 2.53 2.54 2.55 2.56 5.42 5.43 5.44 5.45 5.46 5.47 5.48 5.49 5.50 2.30 2.35 2.40 2.45 2.50 2.55 2.60 -40 -25-10 5 20 35 50 65 80 95 110125 -40 -25-10 5 20 35 50 65 80 95 110125 -40 -25 -10 5203550 65 80 95 110125 -40 -25 -10 520355065 80 95 110125 -40 -25 -10 520355065 80 95 110125 -40 -25-10 5 20 35 50 65 80 95 110125 -40 -25-10 5 20 35 50 65 80 95 110125 -40 -25-10 5 20 35 50 65 80 95 110125 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.85 0.90 0.95 1.00 1.05 1.10 0.85 0.80 0.90 0.95 1.00 1.05 1.10 0.98 0.99 1.00 1.01 1.02 1.03 1.04
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 10 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. typical performanc e characteristics MP163cgs-5, v in = 230v ac , v out1 = 12v, i out1 = 200ma, v out2 = 5v, i out2 = 50ma, l = 1mh, t a = +25c, unless otherwise noted.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 11 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. pin functions pin # soic8-7b pin # soic16 name description 1 15 in input voltage of the ldo. 2 11 source internal power mosfet source. source is also the ground reference for vcc and fb. 4 8 drain internal power mosfet drain. drain is also the high-voltage current source input. 5 9 vcc control circuit power supply. 6 10 fb regulator feedback. 7 1, 4, 14 gnd ground of the ldo. 8 3 out output voltage of the ldo. - 16 en enable of the integrated ldo. drive en to logic high to enable the ldo. drive en to logic low to shut down the ldo. - 2, 5, 6, 7, 12, 13 nc no connection.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 12 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. block diagram drain vcc fb source start-up unit power management feedback control driving signal management protection unit peak current limitation ldo in out gnd figure 1: functional block diagram
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 13 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. operation the MP163 is a green-mode operation regulator . the peak current and the switching frequency both decrease with a decreasing load. as a result, the MP163 offers excellent light- load efficiency and improves overall average efficiency. the regulator also incorporates multiple features and operates with a minimum number of external components. the MP163 acts as a fully integrated regulator when used in a buck topology (see the typical application on page 2 ). start-up and under-voltage lockout (uvlo) the internal high-voltage regulator self-supplies the ic from drain. when vcc reaches vcc off , the ic starts switching, and the internal high-voltage regulator turns off. the internal high-voltage regulator turns on to charge the external vcc capacitor when vcc falls below vcc on . a small capacitor (in the low f range) maintains vcc and lowers the capacitor cost. the ic stops switching when vcc drops b e low vcc stop . under fault conditions ( such as olp, scp, and tsd ) the ic stops switching, and an internal current source (~16 a) discharges the vcc capacitor. the internal high-voltage regulator will not charge the vcc capacitor until vcc drops below vcc pro . the restart time can be estimated using equation (1): pro off pro restart vcc cclatch regulator vcc vcc vcc vcc tc ii ?? ?? ?? ? ?? ?? ?? (1) soft start (ss) the ic stops operation when vcc drops b e low vcc stop . the ic begins operation when vcc charges to vcc off . there is a soft-start period whenever the chip starts operation. soft start prevents the inductor current from overshooting by limiting the minimum off time. the MP163 adopts a two- phase minimum off - time limit soft start. each soft-start phase lasts for 128 switching cycles. during soft start, the off - time limit shortens gradually from minoff_ss1 to minoff_ss2 and reaches minoff (see figure 2). figure 2: minimum off time at start-up constant voltage (cv) operation the MP163 regulates the output voltage by monitoring the sampling capacitor (c3). at the beginning of each cycle, the integrated mosfet turns on while the feedback voltage drops below the 2.55v reference voltage, which indicates an insufficient output voltage. the peak current limitation determines the on period. after the on period elapses, the integrated mosfet turns off. the sampling capacitor (c3) voltage is charged to the output voltage through d3 when the freewheeling diode (d2) turns on. this way, the sampling capacitor (c3) samples and holds the output voltage for output regulation. the sampling capacitor (c3) voltage decreases when the inductor (l1) current falls below the output current. when the feedback voltage falls below the 2.55v reference voltage, a new switching cycle begins. figure 3 shows this operation in continuous conduction mode (ccm). mosfet diode i l i peak i o v o v fb 2.55 v figure 3: v fb vs. v o d etermine the output voltage with equation (2) : ? ?? r1 r2 vo 2.55v r2 (2)
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 14 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. frequency foldback and peak current compression the MP163 remains highly efficient at light-load condition by reducing the switching frequency automatically. under light-load or no-load conditions, the output voltage drops very slowly, which increases the mosfet off time , and the frequency decreases with the load. the switching frequency in ccm is determined with equation (3): in o o s peak o in (v v ) v f 2l(i i ) v ? ?? ? (3) the switching frequency in discontinuous conduction mode (dcm) is determined with equation (4): ? ?? in o o o s 2 peak in 2(v v ) i v f li v (4) as the peak current limit decreases from i limit , the off time increases. in standby mode, the frequency and the peak current are both minimized, allowing for a smaller dummy load. as a result, peak current compression helps further reduce no-load consumption. the peak current limit can be estimated with equation (5) : peak off min off limit i(10.0038(t )/s)i ?? ? ?? ?? (5) where off is the off time of the power module. error amplifier ( ea ) compensation the MP163 has an internal error amplifier (ea) compensation loop that samples the feedback voltage 6s after the mosfet turns off and regulates the output based on the 2.55v reference voltage. ramp compensation an internal ramp compensation circuit improves the load regulation. an exponential voltage signal is added to pull down the reference voltage of the feedback comparator (see figure 4). the ramp compensation is a function of the load conditions . the compensation is about 1mv/s in full-load condition and increases exponentially as the peak current decreases. figure 4: ea and ramp compensation over l oad protection (olp) the maximum output power of the MP163 is limited by the maximum switching frequency and peak current limit. if the load current is too large, the output voltage drops, causing the fb voltage to drop. when fb voltage drops below v fb_olp , this is considered to be an error flag, and the timer starts. if the timer reaches 220ms (f s = 28khz), overload protection ( olp ) occurs. this timer duration prevents olp from being triggered when the power supply starts up or the load transitions. the power supply should start up in less than 220ms (f s = 28khz). the olp delay time is calculated using equation (6): delay s 28khz 220ms f ?? ? (6) short-circuit protection (scp) the MP163 monitors the peak current and shuts down the mosfet when the peak current rises above the short-circuit protection ( scp ) threshold. the power supply resumes operation with the removal of the fault. thermal shutdown to prevent thermal - induced damage, the MP163 stops switching when the junction temperature exceeds 150 c. during thermal shutdown, the vcc capacitor is discharged to vcc pro , and then the internal high-voltage regulator re-charges. the MP163 recovers when the junction temperature drops below 120c.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 15 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. open-loop detection if fb voltage is less than 0.5v, the ic stops switching , and a restart cycle begins. during a soft start, the open-loop detection is blanked. leading-edge blanking (leb ) an internal leading-edge blanking (leb) unit avoids premature switching pulse termination due to a turn-on spike. a turn-on spike is caused by parasitic capacitance and reverse recovery of the freewheeling diode. during the blanking time, the current comparator is disabled and cannot turn off the external mosfet. figure 5 shows the leading-edge blanking. i limit 350ns i ds t figure 5: leading-edge blanking integrated ldo the continuous output current of the integrated ldo is up to 150ma but is also limited by the thermal performance. the peak output current is limited to 270ma in olp. when the input of the integrated ldo (usually the high-side buck output of the MP163) is much higher than its output, there is a large power dissipation on the MP163, which worsens the thermal performance. an external resistor connected to in can help with the ldo thermal by sharing part of the total voltage drop.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 16 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. application information topology options the MP163 can be used in common topologies such as buck, boost, buck-boost, and flyback. component selection is based on the typical application shown on page 2 . selecti n g the i nput capacitor the input capacitor supplies dc input voltage for the converter. figure 6 shows the typical dc bus voltage waveform of a half-wave rectifier and a full-wave rectifier. vin dc input voltage t v dc(min) v dc(max) ac input voltage vin dc input voltage t v dc( min) v dc(max) ac input voltage figure 6: input voltage waveform typically, the use of a half-wave rectifier requires an input capacitor rated at 3f/w for the universal input condition. when using a full- wave rectifier, the input capacitor is chosen between 1.5 ~ 2f/w for the universal input condition. a half-wave rectifier is recommended for output applications less than 2w. otherwise, use a full-wave rectifier. under very low input voltages, the inductor current ramps up slowly. it may not reach the current limit during maxon , so the mosfet on time should be less than the minimum value of maxon . selecting the inductor the MP163 has a minimum off time limit that determines the maximum power output. a power inductor with a larger inductance increases the maximum power. using a very small inductor may cause failure at full load. the maximum power in ccm can be calculated with equation (7) ? ?? ominoff omax o peak v pv(i ) 2l (7) the maximum power in dcm can be calculated with equation (8): ?? ? 2 o max peak minoff 11 pli 2 (8) for mass production, tolerance on the parameters (such as peak - current limitation and the minimum off time) should be taken into consideration. freewheeling diode select a diode with a maximum reverse voltage rating greater than the maximum input voltage and a current rating determined by the output current. the reverse recovery of the freewheeling diode can affect efficiency and circuit operation during ccm, so use an ultra-fast diode , such as the ugc10jh. selecting the output capacitor the output capacitor is required to maintain the dc output voltage. estimate the output voltage ripple in ccm using equation (9): ccm _ ripple esr so i vir 8f c ? ???? (9) estimate the output voltage ripple in dcm with equation (10): 2 pk o o dcm _ ripple pk esr so pk ii i vir fc i ?? ? ?? ?? ?? ?? ?? (10) it is recommended to use ceramic, tantalum, or low esr electrolytic capacitors to reduce the output voltage ripple. feedback resistors the resistor divider connected to fb determines the output voltage. choose appropriate r1 and r2 values to set the output voltage . r2 should be about a few k ? to tens of k ? in value .
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 17 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. feedback capacitor the feedback capacitor provides a sample - and - hold function. small capacitors result in poor regulation at light loads, and large capacitors affect the circuit operation. roughly estimate an optimal capacitor value using equation (11): oo oo fb 12o 12o vc vc 1 c 2r r i r r i ?? ? ? ?? (11) dummy load a dummy load is required to maintain the load regulation. this ensures sufficient inductor energy to charge the sample - and - hold capacitor to detect the output voltage. normally , a 3ma dummy load is needed and can be adjusted according to the regulated voltage. there is a compromise between small, no-load consumption and good, no-load regulation, especially for applications that require 30mw of no-load consumption. use a zener diode to reduce the no-load consumption if no-load regulation is not a concern. auxiliary vcc supply for MP163 applications which have a v out above 7v, a less than 30mw no-load power consumption can be achieved by adopting an external vcc supply to reduce overall power consumption (see figure 7). figure 7: auxiliary vcc supply circuit this auxiliary vcc supply is derived from the resistor connected between c3 and c4. c4 should be larger than the value recommended above. d3 is used in case that vcc interferes with fb. r3 is determined using equation (12) : out fw s vv5.8v r3 i ?? ? (12) where i s is the vcc consumption under a no- load condition, and v fw is the forward voltage drop of d3. because i s varies in different applications, r3 should be adjusted to meet the application?s specific i s . in a particular configuration, i s is measured at about 200a. surge performance an appropriate input capacitor value should be chosen to obtain a good surge performance. figure 8 shows the half-wave rectifier. table 1 shows the capacitance required under normal conditions for different surge voltages. fr1 is a 20 ? /2w fused resistor, and l1 is 1mh for this recommendation. l1 c1 c2 n l fr1 figure 8: half-wave rectifier table 1: recommended capacitance surge voltage 500v 1000v 2000v c1 1 f 2.2 f 3.3 f c2 1 f 2.2 f 3.3 f
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 18 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. pcb layout guidelines efficient pcb layout is critical for stable operation, good emi, and good thermal performance. for best results, refer to figure 9 and follow the guidelines below . 1) minimize the loop area formed by the input capacitor, ic, freewheeling diode, inductor, and output capacitor. 2) place the power inductor far away from the input filter while keeping the loop area to the inductor at a minimum. 3) place a capacitor valued at several hundred pf between fb and source as close to the ic as possible. 4) connect the exposed pads or large copper area with drain to improve thermal performance. top layer bottom layer figure 9: recommended layout design example table 2 shows a design example for the following application guideline specifications . table 2: design example v in 85v ac to 265v ac v out1 12v i out1 200ma v out2 5v i out2 50ma the detailed application schematic is shown in figure 10 . the typical performance and circuit waveforms are shown in the typical performance characteristics section. for additional device applications, please refer to the related evaluation board datasheets.
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 19 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. typical application circuit figure 10 shows a typical applicati on example of a 12v/200ma and 5v/50ma non-isolated power supply using the MP163cgs-5. figure 10: typical application at 12v/200ma and 5v/50ma
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 20 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. flow chart uvlo, scp, olp, otp and open-loop protections are auto restart power on vcc>vcc off internal high voltage regulator on y n soft start monitor fb voltage monitor vcc olp fault logic high y tsd, scp and open-loop monitor vcc decrease to vcc pro shut down internal high voltage regulator n fault logic high? y n stop operation y n y < v fb turn on the mosfet y n counts to 6144 switching cycle? y y n vcc stop vcc>vcc off vcc MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 21 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. signal sequence figure 11: signal evolution in the presence of a fault
MP163 ? 700v, non-isolated, offline regulator with integrated ldo MP163 rev. 1.01 www.monolithicpower.com 22 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. package information soic16 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.020(0.50) x 45 o see detail "a" 0.0075(0.19) 0.0098(0.25) 0.150 (3.80) 0.157 (4.00) pin 1 id 0.050(1.27) bsc 0.013(0.33) 0.020(0.51) seating plane 0.004(0.10) 0.010(0.25) 0.386( 9.80) 0.394(10.00) 0.053(1.35) 0.069(1.75) top view front view 0.228 (5.80) 0.244 (6.20) side view 1 8 16 9 recommended land pattern 0.213 (5.40) 0.063 (1.60) 0.050(1.27) 0.024(0.61) note: 1) control dimension is in inches. dimension in bracket is in millimeters. 2) package length does not include mold flash, protrusions or gate burrs. 3) package width does not include interlead flash or protrusions. 4) lead coplanarity (bottom of leads after forming) shall be 0.004" inches max. 5) drawing conforms to jedec ms-012, variation ac. 6) drawing is not to scale. 0.010(0.25) bsc gauge plane
MP163 ? 700v, non-isolated, offline regulator with integrated ldo notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP163 rev. 1.01 www.monolithicpower.com 23 8/11/2017 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2017 mps. all rights reserved. package information (continued) soic8-7b

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