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| MP3394 step-up, 4-string max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 1 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. the future of analog ic technology description the MP3394 is a step-up controller with 4- channel current sources designed for driving the wled arrays for large size lcd panel backlighting applications. the MP3394 is flexible for extending led channels with two or more MP3394s in parallel while operating from a single inductor power source. the MP3394 uses current mode, fixed frequency architecture. the switching frequency is programmable by an external frequency setting resistor. it drives an external mosfet to boost up the output voltage from a 5v to 28v input supply. the MP3394 regulates the current in each led string to the programmed value set by an external current setting resistor. the MP3394 applies 4 internal current sources for current balance and the current matching can achieve 2.5% regulation accuracy between strings. its low 350mv regulation voltage on led current sources reduces power loss and improves efficiency. pwm dimming is implemented with external pwm input signal or dc input signal. the dimming pwm signal can be generated internally and the dimming frequency is programmed by an external setting capacitor. features ? 4-string, max 200ma/string wled driver ? 5v to 28v input voltage range ? 2.5% current matching accuracy between strings ? programmable switching frequency ? pwm or dc input burst pwm dimming ? open and short led protection ? programmable over-voltage protection ? cascading capability with a single power source ? under voltage lockout ? thermal shutdown ? tssop16ep soic16, soic20 package applications ? desktop lcd flat panel displays ? flat panel video displays ? lcd tvs and monitors all mps parts are lead-free and adhere to the rohs directive. for mps green status, please visit mps website under quality assurance. ?mps? and ?the future of analog ic technology? are registered trademarks of monolithi c power systems, inc. typical application vin 5v~28v MP3394 isense en osc bosc dbrt ovp led1 led2 led3 5 7 3 6 13 12 11 10 enable dimming l1 d1 c in r1 r2 r set c bosc r osc r sense m1 led4 r comp 9 8 vin vcc comp 15 16 1 2 iset c ou t c comp c vc c r bosc gate 14 gnd 4
MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 2 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ordering information part number package top marking MP3394ef * tssop16ep MP3394 MP3394es ** soic16 MP3394 MP3394ey *** soic20 MP3394 * for tape & reel, add suffix ?z (e.g. MP3394ef?z). for rohs compliant packaging, add suffix ?lf (e.g. MP3394ef?lf?z) ** for tape & reel, add suffix ?z (e.g. MP3394es?z). for rohs compliant packaging, add suffix ?lf (e.g. MP3394es?lf?z) *** for tape & reel, add suffix ?z (e.g. MP3394ey?z). for rohs compliant packaging, add suffix ?lf (e.g. MP3394ey?lf?z) package reference 18 17 16 15 20 19 7 8 top view 14 13 3 4 5 6 1 2 ovp led1 nc vcc vin g a t e i s e n s e n c gnd comp en iset dbrt nc nc osc 9 10 led4 bosc 12 11 led2 led3 tssop16ep soic16 soic20 absolute maxi mum ratings (1) v in .................................................-0.3v to +30v v gate ..............................................-0.5v to 6.8v v cc .................................................-0.5v to 6.8v v led1 to v led4 ....................................-1v to +55v all other pins ...............................-0.3v to +6.3v continuous power dissipation (t a = +25c) (2) tssop16ep????????????...2.78 w soic16 ??????????????1.56 w soic20 ?????????????? 1.74w junction temperature ...............................150 c lead temperature ....................................260 c storage temperature............... -65 c to +150 c recommended operating conditions (3) supply voltage v in ..............................5v to 28v led current (backlight) ...........10ma to 180ma operating junction temp. (t j ). -20c to +125c thermal resistance (4) ja jc tssop16ep ...........................45 ...... 10 ... c/w soic16 ...................................80 ...... 35 ... c/w soic20 ...................................72 ...... 30 ... 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 t a . the maximum allowable continuous power dissipation at any ambient temperature is calculated by p d (max) = (t j (max)-t a )/ ja . exceeding the maximum allowable powe r dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. internal thermal shutdown circuitry protects the device from permanent damage. 3) the device is not guaranteed to function outside of its operation conditions. 4) measured on jesd51-7, 4-layer pcb. MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 3 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. electrical characteristics v in =12v, v en = 5v, t a = +25 c, unless otherwise noted. parameters symbol condition min typ max units operating input voltage v in 5 28 v supply current (quiescent) i q v in =12v, v en =5v, no load with switching 4 ma supply current (shutdown) i st v en =0v, v in =12v 2 a ldo output voltage v cc v en =5v, 7v MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 5 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions tssop16ep &soic16 soic20 name description 1 1 comp step-up converter compensation pin. this pin is used to compensate the regulation control loop. connect a ceramic capacitor from comp to gnd. 2 2 en enable control input. do not let this pin float. 3 3 dbrt brightness control input. to use external pwm dimming mode, apply a pwm signal on this pin for brightness control. to use dc input pwm dimming mode, apply a dc voltage range from 0.2v to 1.2v on this pin linearly to set the internal dimming duty cycle from 0% to 100%. the MP3394 has positive dimming polarity on dbrt. 4 5 gnd ground. 5 7 osc switching frequency set. connect a resistor between osc and gnd to set the step-up converter switching fre quency. the voltage at this pin is regulated to 1.23v. the clock frequency is proportional to the current sourced from this pin. 6 8 iset led current set. tie a current setting resistor from this pin to ground to program the current in each led string. this pin voltage is regulated to 1.23v. the led current is proportional to the current through the iset resistor. 7 9 bosc dimming repetition set. this is the ti ming pin for the oscillator to set the dimming frequency. to use dc input pwm dimming mode, connect a capacitor from this pin to gnd to set the internal dimming frequency. a saw- tooth waveform is generated on this pin. to use external pwm dimming mode, connect a resistor from this pin to gnd, and apply the pwm signal on dbrt pin. 8 10 led4 led string 4 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 4 cathode to this pin. 9 11 led3 led string 3 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 3 cathode to this pin. 10 12 led2 led string 2 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 2 cathode to this pin. 11 13 led1 led string 1 current input. this pin is the open-drain output of an internal dimming control switch. connect the led string 1 cathode to this pin. 12 14 ovp over-voltage protection input. connect a resistor divider from output to this pin to program the ovp threshold. when this pin voltage reaches 1.23v, the MP3394 triggers over voltage protection mode. MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 6 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. pin functions (continued) tssop16ep &soic16 soic20 name description 13 17 isense current sense input. during normal operat ion, this pin senses the voltage across the external inductor current sensing resistor for peak current mode control and also to limit the inductor cu rrent during every switching cycle. if this pin is not used in extending app lication with other master MP3394, tie this pin to gnd, do not let this pin floating. 14 18 gate step-up converter power switch gate ou tput. this pin drives the external power n-mos device. 15 19 vin supply input. vin supplies the power to the chip, as well as the step-up converter switch. drive vin with a 5v to 28v power source. must be locally bypassed. 16 20 vcc the internal 6v linear regulator output. vcc provides power supply for the external mosfet switch gate driver an d the internal control circuitry. bypass vcc to gnd with a ceramic capacitor. 4, 6, 15, 16 nc no connect. MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 7 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical performanc e characteristics v in =12v, 12 leds in series, 4 strings parallel, 120ma/string, unless otherwise noted. v sw 20v/div. v out 20v/div. i led 500ma/div. steady state v sw 20v/div. v out 20v/div. v in 10v/div. i led 500ma/div. vin startup v sw 20v/div. v out 20v/div. v en 5v/div. i led 500ma/div. ven startup v sw 20v/div. v bosc 500mv/div. v out 20v/div. i led 500ma/div. dc burst dimming v pwm = 0.1v, c bosc = 1.8nf v sw 20v/div. v out 20v/div. v pwm 5v/div. i led 500ma/div. external pwm dimming f pwm = 2khz, d pwm = 50% v sw 20v/div. v out 20v/div. v in 10v/div. i led 500ma/div. open led protection open all led strings at working v sw 20v/div. v out 20v/div. v in 10v/div. i led 500ma/div. open led protection open one led string at working v sw 20v/div. v out 20v/div. v led1 20v/div. i led 500ma/div. short led protection short v out to ledx at working efficiency efficiency vs. vin 0.8 0.825 0.85 0.875 0.9 0.925 0.95 0.975 1 51015202530 input voltage (v) MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 8 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. function diagram figure 1?MP3394 function block diagram MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 9 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. operation the MP3394 employs a programmable constant frequency, peak current mode step-up converter and 4-channels regulated current sources to drive the array of 4 strings white leds. the operation of the MP3394 can be understood by referring to the block diagram of figure 1. internal 6v regulator the MP3394 includes an internal linear regulator (vcc). when vin is greater than 6.5v, this regulator offers a 6v power supply for the external mosfet switch gate driver and the internal control circuitry. the vcc voltage drops to 0v when the chip shuts down. the MP3394 features under voltage lockout. the chip is disabled until vcc exceeds the uvlo threshold. and the hysteresis of uvlo is approximately 200mv. system startup when the MP3394 is enabled, the chip checks the topology connection first. the chip monitors the ovp pin to see if the schottky diode is not connected or the boost output is short to gnd. if the ovp voltage is lower than 70mv, the chip will be disabled. the MP3394 will also check other safety limits, including uvlo and otp after the ovp test is passed. if they are all in function, it then starts boosting the step-up converter with an internal soft-start. it is recommended on the start up sequence that the enable signal comes after input voltage and pwm dimming signal established. step-up converter the converter operation frequency is programmable (from 150khz to 500khz) with a external set resistor on osc pin, which is helpful for optimizing the external components sizes and improving the efficiency. at the beginning of each cycle, the external mosfet is turned on by the internal clock. to prevent sub-harmonic oscillations at duty cycles greater than 50 percent, a stabilizing ramp is added to the output of the current sense amplifier and the result is fed into the pwm comparator. when this result voltage reaches the output voltage of the error amplifier (v comp ) the external mosfet is turned off. the voltage at the output of the internal error amplifier is an amplified signal of the difference between the 350mv reference voltage and the feedback voltage. the converter automatically chooses the lowest active ledx pin voltage for providing enough bus voltage to power all the led arrays. if the feedback voltage drops below the 350mv reference, the output of the error amplifier increases. it results in more current flowing through the power fet, thus increasing the power delivered to the output. in this way it forms a close loop to make the output voltage in regulation. at light-load or vout near to vin operation, the converter runs into the pulse-skipping mode, the fet is turned on for a minimum on-time of approximately 100ns, and then the converter discharges the power to the output in the remain period. the external mosfet will keep off until the output voltage needs to be boosted again. dimming control the MP3394 provides two pwm dimming methods: external pwm signal or dc signal input pwm dimming mode (see figure 2). + - dpwm oscillator dpwm comparator dbrt bosc ex-pwm input c bosc dpwm output figure 2?pwm dimming method MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 10 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. when bias the bosc pin to a dc level by a resistor, applying an external pwm signal to the dbrt pin to achieve the external pwm dimming. a dc analog signal can be directly applied to the dbrt pin to modulate the led current with a capacitor on bosc pin. and the dc signal is then converted to a dpwm dimming signal with the setting oscillation frequency. the brightness of the led array is proportional to the duty cycle of the dpwm signal. the dpwm signal frequency is set by the cap at the bosc pin. open string protection the open string protection is achieved through detecting the voltage of ovp and led1~4 pin. if one or more strings are open, the respective ledx pins are pulled to ground and the ic keeps charging the output voltage until it reach ovp threshold. then the part marks off the open strings whose ledx pin voltage is lower than 196mv. once the mark-off operation completes, the remaining led strings force the output voltage back into tight regulation. the string with the highest voltage drop is the ruling string during output regulation. the MP3394 always tries to light at least one string and if all strings are open, the MP3394 shuts down the step-up converter. the part maintains mark-off information until resetting it. short string protection the MP3394 monitors the ledx pin voltage to judge if the short string fault occurs. if one or more strings are short, the respective ledx pins tolerate high voltage stress. if the ledx pin voltage is higher than 6.3v, the short string condition is detected on the respective string. when the short string fault (ledx over-voltage fault) keeps for 2048 switching clocks, the fault string is marked off and disable. once a string is marked off, its current regulation is forced to disconnect from the output voltage loop regulation. the marked-off led strings will be shut off totally until the part restarts. if all strings are short, the MP3394 will shut down the step-up converter. the part maintains mark-off information until resetting it. MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 11 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. application information selecting the switching frequency the switching frequency of the step-up converter is recommended from 150khz to 500khz for most of application. an oscillator resistor on osc pin sets the internal oscillator frequency for the step-up converter according to the equation: f sw (khz) = 62100 / r osc k ? for r osc =330k ? , the switching frequency is set to 188 khz. setting the led current the led string currents are identical and set through the current setting resistor on the iset pin. i led (ma) = 790 x 1.23v / (r set +0.4)(k ? ) for r set =7.68k ? , the led current is set to 120ma. the iset pin can not be open. selecting the input capacitor the input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. the input capacitor impedance at the switching frequency should be less than the input source impedance to prevent high frequency switching current from passing through the input. ceramic capacitors with x5r or x7r dielectrics are highly recommended because of their low esr and small temperature coefficients. for most applications, a 4.7 f ceramic capacitor paralleled a 220uf electrolytic capacitor is sufficient. selecting the inductor and current sensing resistor the inductor is required to force the higher output voltage while being driven by the input voltage. a larger value inductor results in less ripple current, resulting in lower peak inductor current and reducing stress on the internal n-channel mosfet. however, the larger value inductor has a larger physical size, higher series resistance,and lower saturation current. choose an inductor that does not saturate under the worst-case load conditions. the minimum value of inductor is selected to ensure that the boost converter works in continuous conduction mode for high efficiency and good emi performance. calculate the required inductance value by the equation: 2 out sw load v d(1d) l 2 f i ? out in v v 1 d ? = where v in and v out is the input and output voltage, f sw is the switching frequency, i load is the led load current, and is the efficiency. the switch current is usually used for the peak current mode control. in order to avoid hitting the current limit, the voltage across the sensing resistor r sense should be less than 80% of the worst case current limit voltage, v sense . sense sense l(peak) 0.8 v r i = out load in out in l(peak) in sw out vi v(v-v) i v 2lfv =+ where i l(peak) is the peak value of the inductor current. v sense is shown in figure 3. current limit-vsense (mv) duty cycle (%) vsense vs. duty cycle 0 100 200 300 400 500 0 102030405060708090100 figure 3?v sense vs duty cycle selecting the power mosfet the MP3394 is capable of driving a wide variety of n-channel power mosfets. the critical parameters of selection of a mosfet are: 1. maximum drain to source voltage, v ds(max) 2. maximum current, i d(max) 3. on-resistance, r ds(on) 4. gate source charge q gs and gate drain charge q gd 5. total gate charge, q g MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 12 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. ideally, the off-state voltage across the mosfet is equal to the output voltage. considering the voltage spike when it turns off, v ds(max) should be greater than 1.5 times of the output voltage. the maximum current through the power mosfet happens when the input voltage is minimum and the output power is maximum. the maximum rms current through the mosfet is given by rms(max) in(max) max iid = where: out in(min) max out vv d v ? the current rating of the mosfet should be greater than 1.5 times i rms the on resistance of the mosfet determines the conduction loss, which is given by: k r i p (on) ds 2 rms cond = where k is the temperature coefficient of the mosfet. the switching loss is related to q gd and q gs1 which determine the commutation time. q gs1 is the charge between the threshold voltage and the plateau voltage when a driver charges the gate, which can be read in the chart of v gs vs. q g of the mosfet datasheet. q gd is the charge during the plateau voltage. these two parameters are needed to estimate the turn on and turn off loss. sw in ds plt dr g gd sw in ds th dr g gs1 sw f i v v v r q f i v v v r q p ? + ? = where v th is the threshold voltage, v plt is the plateau voltage, r g is the gate resistance, v ds is the drain-source voltage. please note that the switching loss is the most difficult part in the loss estimation. the formula above provides a simple physical expression. if more accurate estimation is required, the expressions will be much more complex. for extended knowledge of the power loss estimation, readers should refer to the book ?power mosfet theory and applications? written by duncan a. grant and john gowar. the total gate charge, q g , is used to calculate the gate drive loss. the expression is sw dr g dr f v q p = where v dr is the drive voltage. selecting the output capacitor the output capacitor keeps the output voltage ripple small and ensures feedback loop stability. the output capacitor impedance should be low at the switching frequency. ceramic capacitors with x7r dielectrics are recommended for their low esr characteristics. for most applications, a 4.7 f ceramic capacitor paralleled 22 f electrolytic capacitor will be sufficient. setting the over voltage protection the open string protection is achieved through detecting the voltage of ovp pin. in some cases, an led string failure results in the feedback voltage always zero. the part then keeps boosting the output voltage higher and higher. if the output voltage reaches the programmed ovp threshold, the protection will be triggered. to make sure the chip functions properly, the ovp setting resistor divider must be set with a proper value. the recommended ovp point is about 1.1~1.2 times higher than the output voltage for normal operation. high ovp low r v1.23(1 ) r =+ selecting dimming control mode the MP3394 provides 2 different dimming methods 1. direct pwm dimming an external pwm dimming signal is employed to achieve pwm dimming control. connect a 100k ? resistor from bosc pin to gnd and apply the 100hz to 20khz pwm dimming signal to dbrt pin. the minimum recommended amplitude of the pwm signal is 1.2v. the low level should be less than 0.4v(see figure 4). MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 13 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. bosc dbrt MP3394 pwm dimming 100hz~20khz r1 100 k o figure 4?direct pwm dimming table 1 shows the pwm dimming duty range with different pwm dimming frequency. table 1?the range of pwm dimming duty fpwm(hz) dmin dmax 100 MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 14 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. typical application circuit 10 r3 nc r1 0 r9 vin gnd en dim c4 nc c5 c1 f1 l1 b360 d1 nc c7 c2 c6 c3 357k r2 10k r4 nc c8 led led1 led2 led3 led4 0 r12 0 r13 0 r15 0 r5 m1 100v/4a 2k r16 20k r18 nc c12 100k r14 330k r10 2k r8 20k r11 c9 270 r7 470nf c10 0.05 r6 8v-28v 12s 4p 120ma/string iset 6 dbrt 3 osc 5 en 2 comp 1 vcc 16 vin 15 led4 8 led3 9 led2 10 led1 11 ovp 12 gnd 4 isense 13 gate 14 bosc 7 u1 MP3394 nc c11 7.68k r17 nc c13 gnd gnd gnd gnd gnd gnd figure 7?drive 12 leds in series, 4 strings 120ma/string 10 r3 nc r1 0 r9 vin gnd en dim c4 nc c5 c1 f1 l1 b360 d1 nc c7 c2 c6 c3 562k r2 10k r4 nc c8 led led1 led2 led3 led4 0 r12 0 r13 0 r15 0 r5 m1 100v/4a 2k r16 20k r18 nc c12 100k r14 220k r10 2k r8 20k r11 c9 270 r7 470nf c10 0.05 r6 8v-28v 18s 4p 120ma/string iset 6 dbrt 3 osc 5 en 2 comp 1 vcc 16 vin 15 led4 8 led3 9 led2 10 led1 11 ovp 12 gnd 4 isense 13 gate 14 bosc 7 u1 MP3394 nc c11 7.68k r17 nc c13 3 1 ,2 , 5 , 6 4 m2 3 1 , 2, 5, 6 4 m3 3 1,2,5,6 4 m4 3 1,2,5,6 4 m5 0 r19 nc r20 vin m2-m5: am3490n 100v/1a tsop-6 gnd gnd gnd gnd gnd gnd figure 8 ? drive 18leds in series, 4 strings 120ma/string note: for vin>15v application, use r19 and r20(10k ? ) divider to make a 15v bias voltage for m2-m5. MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 15 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. package information tssop16 with external thermal pad bottom view 2.80 3.30 3.65 4.15 note: 1) all dimensions are in millimeters . 2) package length does not include mold flash , protrusion or gate burr . 3) package width does not include interlead flash or protrusion. 4) lead coplanarity (bottom of leads after forming ) shall be 0.10 millimeters max. 5) drawing conforms to jedec mo-153, variation abt. 6) drawing is not to scale. 0.19 0.30 4.90 5.10 seating plane 0.65 bsc pin 1 id 4.30 4.50 6.20 6.60 18 9 16 0.80 1.05 1.20 max 0.00 0.15 top view front view side view 0.09 0.20 recommended land pattern 5.80 typ 1.60 typ 0.40 typ 0.65 bsc 3.30 typ 4.20 typ detail a 0.45 0.75 0 o -8 o 0.25 bsc gauge plane see detail "a" MP3394?4-string, max 200ma/string white led driver MP3394 rev. 1.07 www.monolithicpower.com 16 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. 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 MP3394?4-string, max 200ma/string white led driver notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. MP3394 rev. 1.07 www.monolithicpower.com 17 3/21/2013 mps proprietary information. patent protec ted. unauthorized photocopy and duplication prohibited. ? 2013 mps. all rights reserved. soic20 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 0.10 millimeters max. 5) drawing conforms to jedec ms-013, variation ac. 6) drawing is not to scale. 0.013(0.33) 0.020(0.51) 0.496(12.60) 0.512(13.00) seating plane 0.050(1.27) bsc pin 1 id 0.291 (7.40) 0.299 (7.60) 0.394 (10.00) 0.418 (10.60) 1 10 11 20 0.093(2.35) 0.104(2.65) 0.004(0.10) 0.012(0.30) top view front view side view 0.009(0.23) 0.013(0.33) recommended land pattern 0.370 (9.40) 0.079 (2.00) 0.024 (0.61) 0.050 (1.27) see detail "a" 0.016(0.41) 0.050(1.27) 0 o -8 o detail "a" 0.010(0.25) 0.030(0.75) x 45 o 0.010(0.25) bsc gauge plane |
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